756 research outputs found
Albunea groeningi Boyko 2002
No full text<i>Albunea groeningi</i> Boyko, 2002 (Figs. 1, 2) <p> <i>Albunea groeningi</i> Boyko, 2002: 296–303, figs. 96, 97 (full synonymy).— Markham & Boyko, 2003: 1, 2, 4, 5.— Boyko, 2007: 181.— Osawa & Fujita, 2007: 137–139, fig. 5f, g.— Boyko & McLaughlin, 2010: 140.— Osawa <i>et al.</i>, 2010: 12–14, figs. 5–6.</p> <p> <b>Material examined</b>. ZSI/ MARC A6785, 2 males, coll. J. S. Yogesh Kumar, 17 July 2019, Digha coast, West Bengal, India, 21°36.950’N, 87°30.264’E.</p> <p> <b>Distribution</b>. Japan (type locality: Honshu Island), Taiwan, Philippines, Singapore, Malaysia, Vietnam, Australia (Queensland, Victoria) and India (present study).</p> <p> <b>Remarks</b>. The key morphological characteristics of the specimens in identifying them as <i>A. groeningi</i> are as follows: CG11 absent, and anterior margin of carapace with 8–11 spines on both sides of ocular sinus; CG1 to CG10 show the same pattern as in the holotype. The rostrum, triangular ocular plate and distal peduncular segment with cornea at tip are present. The pereopod III dactylus has the base to heel deeply concave, heel to tip with a broadly concave indent and slightly concave indent present at the midpoint of the proximal margin, tip acute, and tip to base smoothly convex. The telson of the male specimen is elongated with the length greater than width and the distal tip rounded with a median indentation. Additional measurements of a male 6.30 mm CL and 7.43 mm CW include: right pereopod I length 4.50 mm, width 5.48 mm; pereopod II length 5.46 mm, pereopod III length 6.87 mm, telson length 2.85 mm, abdominal somite I dorsal length 7.74 mm, abdominal somites II–VI dorsal (combined) length 5.71 mm (Figs. 1, 2).</p> <p> <i>Albunea groeningi</i> is very similar to <i>A. symmysta</i> and <i>A. okinawaensis</i> Osawa & Fujita, 2007 but all three species can be distinguished on the basis of their carapace groove pattern, pereopod I–III shape and telson structure (see Osawa & Fujita 2007). The present specimens of <i>A. groeningi</i> are smaller than many previously reported; males are known up to 14.4 mm CL. The species was previously reported from southern Japan southward to Western Australia and Victoria down to 45.7 m depth (Serene & Umali 1965; Boyko 2002) but was unknown west of this range. In general, albuneids are uncommonly collected and poorly known due to their peculiar burrowing habits (Boyko 2002; Osawa & Fujita 2012). Only three species (<i>A. symmysta, A. occulta, A. thurstoni</i>) were previously reported from the Indian coast (Henderson 1893; Serene & Umali 1965; Subramoniam & Panneerselvam 1985; Roy & Mitra 2010; Marimuthu <i>et al.</i> 2015; Reshmi <i>et al.</i> 2017; Kumar <i>et al.</i> 2018) and <i>A. groeningi</i> is newly recorded from India, specifically from West Bengal on the east coast. Additional surveys and taxonomic studies are required to better ascertain the true diversity of sand crabs in India.</p>Published as part of <i>Yogesh Kumar, J. S., Boyko, Christopher B., Arun, G., Geetha, S. & Raghunathan, C., 2020, A new distribution record of Albunea groeningi (Crustacea: Anomura: Decapoda: Albuneidae) from the Digha Coast, West Bengal, India, pp. 588-592 in Zootaxa 4766 (4)</i> on pages 590-591, DOI: 10.11646/zootaxa.4766.4.5, <a href="http://zenodo.org/record/3765765">http://zenodo.org/record/3765765</a>
Capitoniscidae Boyko & Williams 2023, n. fam.
No full textFamily Capitoniscidae n. fam. <p>(Fig 4A–D, I)</p> <p>http://zoobank.org/ urn:lsid:zoobank.org:act: 74A054D1-D0A9-4034-BC19-0B809F43FA3E</p> <p> <b>Diagnosis:</b> Cryptoniscus larva /male body elongate. Head wider than long, anteroposteriorly inflated, posterior margin wider than pereomere 1; eyes absent. Antennule article 1 short, rounded, without marginal teeth; dense setal brush present. Coxal plates with weak marginal crenulations but without teeth. Pereopods 1–3 gnathopodal, 1 and 2 with globular propodi and thick dactyli extending to distal margin of merus, pereopod 3 with ovate propodus and slender dactylus extending to distal margin of carpus; pereopods 4–7 ambulatory with propodi tapering distally; all pereopodal dactyli bearing a distal tooth. Pleotelson triangular, with or without distal row of few stout teeth. Mature female spheroid in dorsal view, unsegmented, possibly with two pairs of pereopods and two pairs of posterior tubercles. Parasitizing cumaceans.</p> <p> <b>Included genera and species:</b> <i>Capitoniscus</i> Bourdon, 1972, type genus (type species = <i>Capitoniscus cumacei</i> Bourdon, 1972 by monotypy); <i>Capitoniscus australis</i> Bourdon, 1981; <i>Capitoniscus peruvicus</i> (Menzies & George, 1972) <b>n. comb.</b>; <i>Carocryptus</i> Schultz, 1977 (type species = <i>Carocryptus laticephalus</i> Schultz, 1977 by original designation).</p> <p> <b>Distribution:</b> Off coast of South Africa (35°44’S, 34°16’E), 3800 m (<i>C</i>. <i>cumacei</i>) (Bourdon 1972); South Pacific Ocean (50°06’S, 127°31’W – 50°12’S, 127°30’W), 3914 m (<i>C</i>. <i>australis</i>) (Bourdon 1981a); off coast of Peru (09°05’S, 80°43’W), 5586–5648 m (<i>C</i>. <i>peruvicus</i> <b>n. comb.</b>) (Menzies and George 1972); Southern Ocean (64°58’S, 114°13’W – 65°19’S, 114°06’W), 3312 m (<i>C</i>. <i>laticephalus</i>) (Schultz 1977).</p> <p> <b>Host:</b> Cumacea: <i>Bathylamprops natalensis</i> Jones, 1969 (Bourdon, 1972) for <i>C</i>. <i>cumacei</i>; hosts of other species not known.</p> <p> <b>Remarks:</b> The three species of <i>Capitoniscus</i> and one of <i>Carocryptus</i> are very similar in all known characters. Of these species, only <i>C. cumacei</i> was described based on a male associated with a female; all others are known only from the cryptoniscus larval stage collected in plankton samples. Cryptoniscus larvae/males of these species are characterized by their inflated heads (Fig. 4A), antennules (Fig. 4B), and pereopod morphologies (Fig. 4C–E), a unique combination of characters within Cryptoniscoidea; thus, the new family Capitoniscidae is herein erected for these two genera that were previously placed as Cryptoniscoidea <i>incertae sedis</i>. <i>Capitoniscus peruvicus</i> <b>n. comb.</b> was very incompletely described and figured but is clearly congeneric with <i>C</i>. <i>cumacei</i> and <i>C</i>. <i>australis</i>, albeit that <i>C</i>. <i>peruvicus</i> n. comb. has the most inflated head of all these species (Fig. 4F).</p> <p> The species of <i>Capitoniscus</i> and <i>Carocryptus</i> can be distinguished by the following characters of the cryptoniscus larvae: coxal plates not visible in dorsal view (<i>Capitoniscus</i>; Fig. 4A) vs. visible in dorsal view (<i>Carocryptus</i>; Fig. 4G) and pleotelson distal margin with few blunt teeth (<i>Capitoniscus</i>; Fig. 4H) vs. smooth (<i>Carocryptus</i>; Fig. 4G). The female of <i>C</i>. <i>cumacei</i> (Fig. 4I) was incompletely described and figured due to the specimen being lost after a preliminary sketch was made (Bourdon 1972).</p>Published as part of <i>Boyko, Christopher B. & Williams, Jason D., 2023, Nomenclatural and taxonomic changes in parasitic isopods (Isopoda: Epicaridea) including two new families and note on the questionable association between monogeneans and bopyrids, pp. 251-269 in Zootaxa 5258 (3)</i> on page 260, DOI: 10.11646/zootaxa.5258.3.1, <a href="http://zenodo.org/record/7780211">http://zenodo.org/record/7780211</a>
Diogenioninae Detorre & Williams & Boyko 2023, n. subfam.
No full textSubfamily Diogenioninae n. subfam. <p> <b>Type genus</b>: <i>Diogenion</i> Codreanu, Codreanu & Pike, 1960</p> <p> <b>Diagnosis</b>: As for genus, see below.</p> <p> <b>Included genera</b>: <i>Diogenion</i> Codreanu, Codreanu & Pike, 1960 (1 species).</p> <p> <b>Remarks:</b> As discussed by Adkison (1990), <i>Diogenion</i> exhibits two apomorphic characters among entoniscids: females with seven pairs of pereopods and lack of pleopods. This genus appears to be the most primitive group of entoniscids and sister taxon to the other two subfamilies, Entoniscinae (apomorphies: females with host derived sheath and oostegites forming brood pouch, first oostegite not different from others, males with unsegmented pereopods) and Entionine (apomorphies: females with heart in pleomere 3 and at least some pleural lamellae complexly folded). Specimens belonging to <i>Diogenion</i> contain characters found in both previously recognized subfamilies; specifically, they share characters with species in Entioninae (presence of a maxilliped in females, and males with segmented pereopods) and Entoniscinae (heart in pleomere 1, absence of pleural lamellae and uropods in females). In terms of larval development, the sole species of <i>Diogenion</i> exhibits synchronous development as is found in species of Entioninae, in contrast to the asynchronous development (i.e., multiple stages at one time in brood chamber) in species of Entoniscinae.Although Adkison (1990) concluded that <i>Diogenion</i> should belong in its own subfamily, he referred to the taxon only as “Subfamily A” throughout the work and his dissertation was never published. In addition, Adkison (1990) never examined any specimens of <i>Diogenion</i>; his conclusions were made solely from analysis of the original description (Codreanu <i>et al.</i> 1960). Based on our examination of new material of <i>Diogenion</i> cf. <i>vermifactus</i> from the Philippines and confirmation of the unique suite of characters, we conclude that the genus should be placed in its own subfamily as designated herein.</p>Published as part of <i>Detorre, Marissa, Williams, Jason D. & Boyko, Christopher B., 2023, A review of the endoparasitic isopods (Epicaridea: Entoniscidae) from hermit crabs, including description of the new subfamily Diogenioninae and a new species of Paguritherium Reinhard, 1945 from the Philippines, pp. 12-40 in Zootaxa 5249 (1)</i> on page 16, DOI: 10.11646/zootaxa.5249.1.2, <a href="http://zenodo.org/record/7685279">http://zenodo.org/record/7685279</a>
Cancrion khanhensis Oanh & Boyko 2020, sp. nov.
No full text<i>Cancrion khanhensis</i> sp. nov. (Figs 1–4, 8 A–C, 9C, D) <p>LSID urn:lsid:zoobank.org:act: 5DACACB1-3B6D-4EB9-916A-27F4C6DC6490</p> <p> <b>Type material.</b> <i> <b>Holotype</b>.</i> Female (24.4 mm TL, stage 12), Nha Trang bay, Khanh Hoa, Vietnam, from Ke Ga cape (12.30°N, 109.24°E) to Cu Hin cape (12.15°N, 109.23°E), ex male <i>Monomia haanii</i> (Stimpson, 1858) (82 mm CW), 25 Apr 2019, coll. L. T. K. Oanh (NOMV-E.56943).</p> <p> <i>Allotype</i>. Male (4.9 mm), same locality and collector data as holotype, ex female <i>M</i>. <i>haanii</i>, 23 Feb 2019 (NOMV-E.56945).</p> <p> <i> <i>Paratypes</i>.</i> All same locality and collector data as holotype. <b>January 2019.</b> Mature female (26 mm TL, stage 12), ex female <i>M. haanii</i> (57 mm CW), 2 Jan 2019 (CNVB 10002); Mature femae (24 mm TL, stage 12), ex male <i>M. haanii</i> (92 mm CW), 2 Jan 2019 (CNVB 10003); Two mature females (26–35 mm TL, stage 12, larger infested with <i>Stellatoniscus tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (3.1 mm), ex female <i>M. haanii</i> (70 mm CW), 2 Jan 2019 (CNVB 10004); Mature female (29 mm TL, stage 12), male (4.3 mm), ex male <i>M. haanii</i> (61 mm CW), 8 Jan 2019 (CNVB 10005); Mature female (32 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (4.3 mm), ex male <i>M. haanii</i> (89 mm CW), 8 Jan 2019 (CNVB 10006).</p> <p> <b>February 2019.</b> Mature female (26 mm TL, stage 12, infested with <i>Stellatoniscus tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), ex female <i>M. haanii</i> (69 mm CW), 23 Feb 2019 (CNVB 10007); Juvenile female (22 mm TL, stage 8), ex male <i>M. haanii</i> (65 mm CW), 23 Feb 2019 (CNVB 10008); Mature female (31 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b> <b>)</b>, male (4.5 mm), ex male <i>M. haanii</i> (65 mm CW), 28 Feb 2019 (NOMV-E.56944); Two mature females (29–32 mm TL, stage 12) male (3.9 mm), ex female <i>M. haanii</i> (65 mm CW), 28 Feb 2019 (CNVB 10009); Juvenile female (26 mm TL, stage 8), ex male <i>M. haanii</i> (64 mm CW), 28 Feb 2019 (CNVB 10010); Two mature females (28–31 mm TL, stage 12, largest infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), two males (3.4–4.8 mm), ex immature male <i>M. haanii</i> (55 mm CW), 28 Feb 2019 (CNVB 10011); Two mature females (24–34 mm TL, stage 12, both infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (4.2 mm), ex male <i>M. haanii</i> (61 mm CW), 28 Feb 2019 (CNVB 10012).</p> <p> <b>March 2019.</b> Juvenile female (21 mm TL, stage 8), ex immature female <i>M. haanii</i> (47 mm CW), 5 Mar 2019 (CNVB 10013); Mature female (31 mm TL, stage 12), male (4.2 mm), ex female <i>M. haanii</i> (73 mm CW), 5 Mar 2019 (CNVB 10014); Two mature females (25–34 mm TL, stage 12), two males (3.7–4.7 mm), ex female <i>M. haanii</i> (70 mm CW), 5 Mar 2019 (CNVB 10015); Mature female (27 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (4.0 mm), ex female <i>M. haanii</i> (66 mm CW), 5 Mar 2019 (CNVB 10016); Mature female (32 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), ex female <i>M. haanii</i> (58 mm CW), 21 Mar 2019 (CNVB 10017); Two immature females (21–23 mm TL, stage 8), male (3.6 mm), ex male <i>M. haanii</i> (73 mm CW), 21 Mar 2019 (CNVB 10018).</p> <p> <b>April 2019.</b> Mature female (26 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (3.6 mm), ex male <i>M. haanii</i> (74 mm CW), 5 Apr 2019 (CNVB 10019); Immature female (21 mm TL, stage 8, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), ex male <i>M. haanii</i> (82 mm CW), 25 Apr 2019 (CNVB 10020).</p> <p> <b>May 2019.</b> Mature male (30 mm TL, stage 12), ex male <i>M. haanii</i> (75 mm CW), 5 May 2019 (CNVB 10021); Mature female (29 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (3.9 mm), ex male <i>M. haanii</i> (65 mm CW), 5 May 2019 (CNVB 10022); Immature female (5 mm TL, stage 2), mature female (24 mm, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), ex male <i>M. haanii</i> (59 mm CW), 5 May 2019 (CNVB 10023); Two mature females (26–30 mm TL, stage 12, both infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), two males (3.2–4.7 mm), ex male <i>M. haanii</i> (71 mm CW), 5 May 2019 (CNVB 10024); Mature male (32 mm TL, stage 12), ex female <i>M. haanii</i> (57 mm CW), 16 May 2019 (CNVB 10025); Two mature females (26–29 mm TL, stage 12, smaller infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (4.1 mm), ex female <i>M. haanii</i> (57 mm CW), 16 May 2019 (CNVB 10026).</p> <p> <b>June 2019.</b> Mature female (28 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (4.1 mm), ex female <i>M. haanii</i> (66 mm CW), 9 Jun 2019 (CNVB 10027); Mature female (33 mm TL, stage 12), male (4.4 mm), ex female <i>M. haanii</i> (65 mm CW), 30 Jun 2019 (CNVB 10028); Immature female (18 mm TL, stage 5), two cryptoniscus larvae (partially damaged), ex female <i>M. haanii</i> (69 mm CW), 30 Jun 2019 (CNVB 10029); Mature female (33 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), ex male <i>M. haanii</i> (82 mm CW), 30 Jun 2019 (CNVB 10030).</p> <p> <b>July 2019.</b> Immature female (3.5 mm TL, stage 1), mature female (26 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), ex ovigerous female <i>M. haanii</i> (73 mm CW), 6 Jul 2019 (CNVB 10031); Mature female (29 mm TL, stage 12), male (4.1 mm), ex immature male <i>M. haanii</i> (57 mm CW), 6 Jul 2019 (CNVB 10032); Two mature females (26–32 mm TL, stage 12, largest infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), two males (3.8–4.1 mm), ex female <i>M. haanii</i> (71 mm CW), 21 Jul 2019 (CNVB 10033); Mature female (34 mm TL, stage 12), male (4.8 mm), ex male <i>M. haanii</i> (64 mm CW), 21 Jul 2019 (CNVB 10034).</p> <p> <b>August 2019.</b> Mature female (31 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), male (4.8 mm), ex female <i>M. haanii</i> (82 mm CW), 7 Aug 2019 (CNVB 10035); Mature female (39 mm TL, stage 12, infested with <i>S</i>. <i>tentaculus</i> <b>gen. nov.</b>, <b>sp. nov.</b>), ex male <i>M. haanii</i> (58 mm CW), 13 Aug 2019 (CNVB 10036); Mature female (39 mm TL, stage 12), ex female <i>M. haanii</i> (76 mm CW), 24 Aug 2019 (CNVB 10037).</p> <p> <b>Comparative material examined.</b> <i>Cancrion australiensis</i> Shields & Earley, 1993: mature holotype female, 15.1 mm, Moreton bay, 27°00’S, 153°00’E, between the mouth of Cabbage Tree Creek and the mouth of the Brisbane River, Queensland, Australia, 5–7 m depth, ex <i>Thalamita sima</i> H. Milne Edwards, 1834, 20 Nov 1990 [in publication; 23 Nov 1990 on label in vial], coll. J. D. Shields (QM W17079); Mature paratype male, 2.3 mm, same data as holotype except 20 Oct 1990 collection date; 1 mature female, Sta. 36A-25, Moreton bay, Mud island, Queensland, Australia, 27°15’S, 153°15’E, ex <i>T</i>. <i>sima</i>, 13 Feb 1991, coll. J. D. Shields (USNM 284172); 1 mature female, Sta. 31-A, Moreton bay, Queensland, Australia, 27°15’S, 153°15’E, ex <i>T</i>. <i>sima</i>, 4 Dec 1990, coll. J. D. Shields (USNM 284173); 1 mature female, Sta. 29-2, Moreton bay, Queensland, Australia, 27°15’S, 153°15’E, ex <i>T</i>. <i>sima</i>, 20 Dec 1990, coll. J. D. Shields (USNM 284174).</p> <p> <b>Etymology.</b> The name refers to the province of Vietnam, Khanh Hoa, in which the species was collected.</p> <p> <b> Description. <i>Mature female</i></b> (stage 12, see Remarks) (Figs 1 A–D) <i>body</i> occupying most of host hemocoel; total length of cephalon, thorax, and abdomen 24–35 mm. Sheath formed by host surrounds entire parasite except for perforation at posterior end (exit pore not observed). Body dorsally recurved, V-shaped from cephalon to posterior end of pleon. <i>Cephalon</i> rounded, 3.0– 4.5 mm, dorsally distinctly divided into 2 bulbous lobes (Fig. 1B), with 2 pairs of antennae and pair of maxillipeds. Both pairs of <i>antennae</i> as slender lobes, subequal in length, inner pair slightly broader (Fig. 1B). <i>Maxilliped</i> with subquadrate coxopodite, folded concave, lamellar exopodite (Fig. 1B); endopodite absent or vestigial (not observed).</p> <p> <i>Pereon</i> compact, 8.0–10.0 mm, ovaries cream to orange, four pairs of large dorsolateral ovarian processes, first pair slightly smaller than others, covering most or all of dorsal, lateral, and ventral margins of pereon (Fig. 8B), <i>pereopod 1</i> absent, <i>pereopods 2–7</i> rudimentary; pereopods 2–5 present as small projections arising from dorsal side at median of respective oostegites, pereopods 6, 7 located on angle between pereon and pleon (Fig. 1H). Five pairs of oostegites forming brood pouch, margins entire. Oostegite 1 with ascendant lobe projecting anteriorly and dorsally, 2 simple transverse lobes, one recurrent lobe extending entire length of pereon with complex folding flap on lateral and flower-shaped fold on dorsal surface (Fig. 1C). Oostegites 2–5 delicate, scarcely overlapping, fused in mature females; oostegite 2 covering base of oostegite 1 and ventral surface of cephalon (Fig. 1A); oostegites 3–5 arising from lateral margins of dorsolateral ovarian processes.</p> <p> <i>Pleon</i> white, 12.0–17.0 mm, composed of 5 segments. Pleomeres 1–5 each with distinct uniramous flattened pair of pleopods that overlay one another (Fig. 1D). Two pairs of complex pleural lamellae positioned medially on pleomeres 1 and 2 (Fig. 1A, D). Oval, bulbous heart in pleomere 3 (Fig. 1A, H). Distal end of pleon with two minute finger-like projections (possibly uropods) (Fig. 1H).</p> <p> <i>Immature females</i> (Figs 1 E–H, 8C) immature newly molted from cryptoniscus females found lying along the median shaft of host gill; vermiform, cylindrical, without appendages (Fig. 1E), immature females found in hemocoel ranging from vermiform, recurved, without appendages (stage 2, Fig. 1F) to V-shaped with rudimentary pleural lamellae (stage 5, Fig. 1G) to V-shaped with developing oostegites plus rudimentary pleural lamellae (stage 8, Fig. 1H); latter stage with ovaries as two cream-colored wavy ridges lying along lateral margins of pereon (Figs 1H, 8C); mature ovigerous females (stage 12, Fig. 8A, B) with orange gonadal tissue.</p> <p> <i>Male</i> (Fig. 2) body elongated, white, markedly curved ventrally, 3.1–4.9 mm long, 0.7–0.85 mm wide, all pereomeres clearly separated dorsally, pereomere 1 fused with rounded cephalon (Fig. 2 A–C). Cephalon with pair of minute dorsolateral eyes (Fig. 2C). Antennulae as large ovate lobes fused medially, with group of short setae anteroventrally (Fig. 2A, B); antennae absent. Mandibles inside oral cone; no vestiges of maxillipeds (Fig. 2B).</p> <p> <i>Pereon</i> maximal width at pereomeres 4–6, gradually tapering anteriorly and posteriorly; lateral margins of pleomeres 1–6 expanded and directed ventrally, overlying bases of pereopods; lateral margins of pleomere 7 directed posteriorly; pereomeres 2–7 each with small setose medioventral tubercle (Fig. 2A). Six pairs of pereopods (absent on pereomere 7) (Fig. 2A), pereopods subequal in size, each with minute dactylus; propodus, carpus fused into single cylindrical segment distally covered with small spinules, merus small, subcircular, variably distinct from propodus/carpus; ischium, basis distinctly separated (Fig. 2A, B, D).</p> <p> <i>Pleon</i> with 5 cylindrical segments plus pleotelson (Fig. 2A). Pleomeres distinctly narrower posteriorly, all separated, with horizontal fold in posterior portion of each segment, when folded, each anterior pleomere overlies base of following segment, pleopods absent. Pleotelson with 2 short, distally rounded, spinulose posterolateral lobes (Fig. 2A, E); anal cone and uropods absent.</p> <p> <i>Epicaridium larva</i> (Fig. 3) approximately 250–265 µm long (anterior margin of cephalon to end of telson), 96–102 µm wide (excluding pereopods). <i>Body</i> tear-drop shaped; anterior margin of head rounded; black-pigmented posterolateral eyespots. <i>Antennula</i> of 2 rounded articles, article 1 wider but scarcely longer than terminal article; terminal article with 2 or 3 long setae and several short setae (Fig. 3A). <i>Antenna</i> elongated, nearly as long as body (Fig. 3A); composed of 6 articles, articles 1 and 2 subequal in size; articles 3 and 4 longer, flagellar article 1 approximately 1.5 times as long as terminal article, with 2 distolateral setae; terminal article bearing long medial seta nearly half as long as entire antenna (Fig. 3A). <i>Mandibles</i> within oral cone.</p> <p> <i>Pereon</i> with 5 anterior pairs of gnathopodal pereopods, subequal in size, each with slender, slightly curved dactylus extending approximately half length of propodus, tip of dactylus hooked; propodus, carpus fused with ventral area of blunt spinules; merus small, subrectangular, ischium and basis cylindrical (Fig. 3A). <i>Pereopod 6</i> greatly elongated, dactylus reduced, not adpressed against carpopropodus; propodus, carpus fused, larger than carpopropodus of other pereopods, ventrally with rounded expansion and distoventral finger-like extension; elongate, flattened, distally expanded and distomedially indented process articulated with propodus/carpus dorsal to dactylus, slightly longer than carpopropodus; 2 lateral setae on stalk and 2 long, simple setae at distolateral margins of process; merus triangular, approximately 1/3 length of ischium; ischium cylindrical, approximately subequal in size to basis; basis cylindrical; merus approximately 3 times longer than on other pereopods; ischium approximately 3 times than on other pereopods; basis approximately 2 times longer than on other pereopods (Fig. 3B).</p> <p> <i>Pleon</i> with 5 pairs of uniramous pleopods (Fig. 3A); triangular sympod bearing 2 long setae at inner distal point, cylindrical exopod articulated with outer distal point of sympod bearing 3 long setae. <i>Uropods</i> biramous, cylindrical peduncle flared slightly at distal end with 1 stout seta on outer angle, distally with 2 slender rami, exopod ending in 2 thin, short setae and 1 long, robust seta, endopod subequal in length to exopod, with 1 long, robust seta (Fig. 3A).</p> <p> <i>Cryptoniscus larva</i> (Fig. 4A) body fusiform, length 700 µm, maximum width at pereomeres 3 and 4. <i>Cephalon</i> anterior margin round (anterior portion of sole specimen damaged). Body pigmentation lacking. <i>Antennula</i> missing. <i>Antenna</i> with four peduncular and 1+ flagellar articles (damaged) (Fig. 4A), distal 2 peduncular articles longer than proximal 2; flagellar article approximately half width of peduncular articles (Fig. 4A). Oral cone triangular, anteriorly directed (Fig. 4A). <i>Pereomeres 1–7</i> with entire (not toothed) coxal plates (Fig. 4A). <i>Pereopods 1–5</i> subequal in shape with long, curved dactylus, propodus expanded proximally with distoventral ridge corresponding to dactylus position bearing small bulges; carpus slender, distally forking; merus triangular, approximately half length of carpus; ischium subrectangular, approximately 2.5 times as long as merus; basis cylindrical, approximately twice as long as ischium (Fig. 4B). Pereopods 1 and 2 subequal in size, 3–5 subequal in size and slightly larger than 1 and 2 (Fig. 4A). Pereopod 6 and 7 missing. Each pleomere with a median ventral acute projection (Fig. 4A); 5 pairs of uniramous pleopods; sympod with distomesial short, subquadrate, extension, proximomesial and distomesial corner with few long setae; exopods recurved with few long terminal setae (Fig. 4C). Pleotelson subquadrate. <i>Uropods</i> biramous, composed of wide subquadrate sympod with single long seta at distolateral corner, endopod slightly longer than exopod, pair of long distal setae on endopods and exopods, short seta at distolateral and distomesial margins of endopods and exopods (Fig. 4D).</p> <p> <b>Distribution.</b> Known only from <i>Monomia haanii</i> collected in Nha Trang bay, Khanh Hoa province, Vietnam.</p> <p> <b>Remarks.</b> The new entoniscid isopod appears to belong to the genus <i>Cancrion</i> with some of whose species it shares the following characters: oostegite 1 of the female of 3 parts; female without ventral ovarian processes; female with two pairs of pleural lamellae; epicaridium larva with elongate pereopod 6 with a highly modified process arising from the distodorsal margin of the propodus. However, it needs to be noted that <i>Cancrion</i> is a potentially heterogeneous grouping in that not all the females have the same number of pleural lamellae (2 in <i>C</i>. <i>australiensis</i> Shields & Earley, 1993, <i>C</i>. <i>carolinus</i> Pearse & Walker, 1939, <i>C</i>. <i>deltoides</i> Shiino, 1942, and <i>C</i>. <i>needleri</i> Pearse & Walker, 1939; 2 or 3 (unclear) in <i>C</i>. <i>cancrorum</i> Müller, 1864; more than 2 in <i>C</i>. <i>miser</i> Giard & Bonnier, 1887; unknown number in <i>C</i>. <i>floridus</i> Giard & Bonnier, 1887. Additionally, the epicaridium larvae are known from only three other species: <i>C</i>. <i>australiensis</i>, <i>C</i>. <i>deltoides</i>, and <i>C</i>. <i>carolinus</i>, and only <i>C</i>. <i>australiensis</i> and <i>C</i>. <i>deltoides</i> show the long process arising from the propodus of pereopod 6 as seen in <i>C</i>. <i>khanhensis</i> <b>sp. nov.</b> It is possible that <i>Cancrion</i> is paraphyletic but a complete redescription of <i>C</i>. <i>miser</i>, the type species, is needed, including details of the epicaridium larval morphology, before any conclusions can be drawn.</p> <p> In comparison to other species of <i>Cancrion, C. khanhensis</i> <b>sp. nov.</b> most resembles <i>C. australiensis</i> and <i>C. deltoides</i> in all known life history stages based on the characters noted above (cryptoniscus larvae for the latter two species are unknown). However, females, males and epicaridium larvae of <i>C. khanhensis</i> <b>sp. nov.</b> possess several characters that distinguish this species from the other two. The length of both females (24–35 mm) and males (3.1–4.9 mm) is considerably la
Asymmetrorbione drepanopleon Boyko 2003, n. sp.
No full textAsymmetrorbione drepanopleon n. sp. (Figs 1-5) Orbione cf. kempi – Markham 1994: 236, fig. 7 (non Orbione kempi Chopra, 1923). TYPE MATERIAL. — New Caledonia. Norfolk Ridge, NORFOLK 1, stn DW 1652, 23°26.1’S, 167°50.3’E, 290-378 m, in left branchial chamber of Sicyonia truncata (Kubo, 1949) (8.3 mm), 19. VI.2001, brooding sinistral holotype 4.43 mm, allotype 2.14 mm (MNHN-Ep 898). — SMIB 2, stn DW 16, 22°51’S, 167°12’E, 390 m, in right branchial chamber of S. truncata (12.9 mm), 19.IX.1986, 1 brooding dextral paratype 6.45 mm, 1 paratype 2.48 mm (MNHN- Ep 904). — SMIB 3, stn DW 28, 22°47’S, 167°12’E, 394 m, in left branchial chamber of S. truncata (7.7 mm), 25. V.1987, 1 non-brooding sinistral paratype 3.68 mm (MNHN-Ep 900). — SMIB 4, stn DW 55, 23°21.4’S, 168°04.5’E, 260 m, in left branchial chamber of S. curvirostris Balss, 1913 (10.8 mm), 9.III.1989, 1 brooding sinistral paratype 4.50 mm, 1 paratype 1.95 mm (MNHN-Ep 923). — Norfolk Ridge, SMIB 4, stn DW 68, 22°55.0’S, 167°16.0’E, 440 m, in left branchial chamber of S. truncata (12.25 mm), 10.III.1989, 1 brooding sinistral paratype 6.23 mm, 1 paratype 2.4 mm (MNHN-Ep 815). — Norfolk Ridge, SMIB 5, stn DW 97, 23°01.1’S, 168°18’E, 300 m, in left branchial chamber of S. truncata (7.6 mm), 14.IX.1989, 1 brooding sinistral paratype 3.98 mm, 1 paratype 1.99 mm (MNHN-Ep 903). — Sponge Bank, Mount B, SMIB 8, stn DW 146, 24°55.2’S, 168°21.7’E, 514-522 m, in right branchial chamber of S. truncata (11.15 mm), 27.I.1993, 1 brooding dextral paratype 4.65 mm, 1 paratype 2.14 mm (MNHN-Ep 902). — Jumeau East Bank, SMIB 8, stn DW 178, 23°45.1’S, 168°17’E, 400 m, in right branchial chamber of S. truncata (9.6 mm), 30.I.1993, 1 brooding dextral paratype 4.88 mm, 1 paratype 2.18 mm (MNHN-Ep 899). — BATHUS 2, stn DW 717, 22°44’S, 167°16.6’E, 350-393 m, in right branchial chamber of S. truncata (8.1 mm), 11. V.1993, 1 brooding dextral paratype 3.45 mm, 1 paratype 2.18 mm (MNHN-Ep 901). ETYMOLOGY. — The specific name is given for the long, curving, sickle-shaped (Greek, drepane) lateral plates that are strongly developed on one side of pleomeres I-III. DISTRIBUTION. — Known only from Sicyonia truncata (Kubo, 1949) and S. curvirostris Balss, 1913, from the vicinity of New Caledonia. Depth: between 260 and 522 m. DESCRIPTION Female (Figs 1; 2) Based on holotype. Body length 4.43 mm, maximal width 3.15 mm, head length 1.05 mm, head width 1.20 mm. Pereon somewhat sinuous but essentially straight, one side distinctly longer than other. All body regions and pereomeres distinctly segmented. Head broad, weakly produced with strong anterior lamina equal to half length of head (Fig. 1A). Eyes absent. Antenna and antennule of three articles each (Fig. 2A). Maxilliped (Fig. 2B) with thin distally rounded spur; upper margin subovate with subdistal, broad, rounded, non-articulating palp and fringe of short setae. First oostegite proximal lobe ovate, distal lobe subtriangular, distally tapering and rounded, internal ridge smooth (Fig. 2C, D). Pereon composed of seven pereomeres, broadest across pereomere III, tapering anteriorly and posteriorly. Coxal plates well developed on longer side, clearly separated from pereomeres on I-V, indistinctly separate on VI and VII; elongateovate in shape on pereomeres I-III, narrowing and becoming longer on IV and V, tapering and bladelike on VI and VII. Dorsolateral bosses clearly demarcated and larger on longer side. Oostegites enclosing only approximately half of marsupium. Pereomeres II-VII with pronounced tergal projections on shorter side. Pereopods V- VII longer than I-IV (Fig. 2E, F). Outer margin of propodus, carpus, and merus with “serrate” region (acute scales along margin). Basis of all pereopods bearing pronounced rounded medial boss having scales on distal half. First pair of pereopods surrounding head region; pereopods I-V evenly spaced, VI and VII closely approximated. Pleon with five distinct pleomeres plus pleotelson; contours of all pleomeres sinuous (Fig. 1A). Pleomeres I-V with biramous pleopods and uniramous lateral plates; short side of body with lateral plates short and thin on pleomeres I-III, becoming shorter and rounded on IV and V; long side of body with lateral plates greatly elongated and bladelike on pleomeres I and II, thinner and shorter on III, short and rounded on IV and V; edges and surfaces of all lateral plates smooth; pleopodal exopodites and endopodites ovate and subequal with lightly tuberculate surfaces, all pairs proportionally longer on long side of body; pleopods only slightly decreasing in size posteriorly; uropods uniramous, slightly larger than, but similar in shape to lateral plates of pleomere V. A B Male (Figs 3; 4) Based on allotype. Length 2.14 mm, maximal width 1.05 mm, head length 0.23 mm, head width 0.60 mm, pleon length 0.38 mm. Head subovate, widest medially, distinct from first segment of pereon (Fig. 3A). Eyes absent. Antenna of three articles, distally setose; not extending beyond margin of cephalon; antennule of two articles; antennae and antennule with long thin setae on distal margins of segments (Fig. 4A). Pereomeres III-V broadest, tapering anteriorly and posteriorly. All pereomeres directed laterally, distolateral margins rounded. No detectable pigmentation. Pereopods (Fig. 4B, C) all subequal, all articles distinctly separated, palm of propodus with “serrate” region on surface and outer margin, outer margin and distal tip of carpus with long thin setae. Pleon with all five segments plus pleotelson fused into single segment, tapering posteriorly with sinuous margins and rounded tip. No midventral tubercles, pleopods or uropods. VARIATIONS The tergal projections on the pereon of the female are variable, sometimes being very indistinct; the frontal lamina is either smooth on the anterior margin or with a few faint indentations; the degree of closure of the marsupium is variable but never approaching fully closed; the medial region of the pleomeres is distinctly bulging dorsally in some specimens (probable artifact of preservation); and the shape of the anteriormost pleopods is variable from ovate to elongate-ovate, but never as tapered as those of A. kempi n. comb. (Chopra 1923: text-fig. 4a). The pleotelson of the male sometimes exhibits residual suture marks from pleomere fusion (Fig. 5); the lateral shape of the pereomeres varies from rounded to bluntly angled, but not acute or subacute. REMARKS Asymmetrorbione drepanopleon n. gen., n. sp. can be separated from its only congener, A. kempi n. comb., by numerous female characters such as the width of the anterior lamina of the cephalon (half of head length in A. drepanopleon n. gen., n. sp., less than half head length in A. kempi n. comb.), presence of eyes (only in A. kempi n. comb.), number of articles in the antenna (three in A. drepanopleon n. gen., n. sp., five in A. kempi n. comb.), scales on the maxilliped (only in A. kempi n. comb.), strong angle on the outer margin of the posterior lobe of the first oostegite (only in A. kempi n. comb.), coxal plates of pereomeres VI and VII distinctly longer and narrower than I-V (A. drepanopleon n. gen., n. sp.), tergal projections on pereomeres (A. drepanopleon n. gen., n. sp.), pleomeres indistinctly separated (A. kempi n. comb.) vs well separated (A. drepanopleon n. gen., n. sp.), lateral plates of pleomeres I-III on long side of body elongate ovate with rounded tips (A. kempi n. comb.) or lamellar and blade-like with acute tips (A. drepanopleon n. gen., n. sp.), pleopodal exopodites and endopodites lamellar (A. kempi n. comb.) or ovate (A. drepanopleon n. gen., n. sp.), and uropods nearly two times longer than lateral plates of pleomere V (A. kempi n. comb.) or subequal to lateral plates of pleomere V (A. drepanopleon n. gen., n. sp.). The males present only minor differences, such as the presence of eyes (only in A. kempi n. comb.) and the number of articles of the antennule (two in A. drepanopleon n. gen., n. sp., three in A. kempi n. comb.). Asymmetrorbione drepanopleon n. gen., n. sp. is also known from two different host species and at considerably greater depths than A. kempi n. comb.Published as part of Boyko, Christopher B., 2003, A new genus and species of bopyrid isopod (Crustacea, Isopoda, Bopyridae, Orbioninae) parasitic on Sicyonia (Crustacea, Decapoda, Penaeoidea) from New Caledonia, pp. 593-600 in Zoosystema 25 (4) on pages 595-599, DOI: 10.5281/zenodo.468952
Parabopyrella symmetros An & Boyko & Li 2015, n. sp.
No full text<p> <i>Parabopyrella symmetros,</i> n. sp. Figure 18</p> <p> <i>Parabopyrella mortenseni:</i> An, 2006: 84–85, fig. 39 (not <i>Parabopyrella mortenseni</i> Nierstrasz and Brender à Brandis, 1929)).</p> <p> MATERIAL EXAMINED: Infesting <i>Alpheus microstylus</i> (Bate, 1888), holotype ♀ (CIEAL 800505), allotype ♂ (CIEAL 800506), Xisha, Shanhu Islands, 111 <b>°</b> 40′E, 16 <b>°</b> 45′N, 9–12 May 1980. Paratypes: 3 ♀♀ (CIEAL 800507), 3 ♂♂ (CIEAL 800508), same data as for holotype.</p> <p>DESCRIPTION: Holotype female (CIEAL 800505): Length 5.92 mm, maximal width 3.81 mm, head length 1.48 mm, head width 1.55 mm, almost symmetrical (fig. 18A, B). Head an inverted trapezoid, lateral margins distinct, posterior margin fused with first pereomere; black eyes near anterolateral corners (fig. 18A). Antennule of three articles, terminally setose, visible in dorsal view, basal article stout. Antenna of two articles, terminally setose. Maxilliped (fig. 18C) with stout palp, terminally truncate, setose. Barbula (fig. 18D) with two pairs of falcate lateral projections on each side, medially flattened.</p> <p>Pereon broadest across third pereomere (fig. 18A). Coxal plates and dorsolateral bosses on first four pereomeres. Brood pouch completely open (fig. 18B), oostegite 1 and barbula visible in ventral view. Oostegite 1 (fig. 18E, F) with two articles, anterior margin of first article concave, internal ridge bearing two or three small projections, posterolateral point directed laterally. Pereopods of similar size (fig. 18G), with slender bases and small dactyli. Pleon of six pleomeres, first pleomere distinct, second to fourth pleomeres on right side distinct, but those on left side obscure and only indicated by lateral indentations. Fifth and sixth pleomeres fused and indicated by lateral notches. Pleotelson fan shaped, terminal margin entire. First five pleomeres with flaplike biramous pleopods; uropods absent.</p> <p>DESCRIPTION: Allotype male (CIEAL800 506): Length 1.95 mm, maximal width across pereomere 3 0.70 mm, head width 0.38 mm, head length 0.17 mm, pleonal length 0.39 mm (fig. 18H, I). Head elliptical, fused with first pereomere, but with lateral notch between head and pereon (fig. 18H); black eyes mediolaterally (fig. 18H). Antennule of two articles, antenna of three articles, lacking terminal setae (fig. 18I). Pereomeres subequal in width, lacking midventral projections (fig. 18I). Pereopods of similar size, but first two with slightly larger dactyli, last four pereopods with longer carpi than first three (fig. 18I). Pleon with first three segments distinct, last three segments fused but indicated by weak lateral indentations. First three pleomeres with midventral tubercles. Pleopods and uropods lacking (fig. 18I).</p> <p> ETYMOLOGY: The specific name <i>symmetros</i> is feminine and refers to the female having an almost symmetrical body shape.</p> <p> HOSTS AND LOCALITY: Infesting <i>Alpheus microstylus</i> (Bate, 1888) (Alpheidae), Xisha (Paracel Islands), China.</p> <p> REMARKS: <i>Parabopyrella symmetros,</i> n. sp., belongs to the “A” group with the female pleotelson posterior margin entire, not incised or indented. The new species can be distinguished from the other five species of “A” group by the symmetrical female having the first, second, and third pleomeres on the right side distinct, and the male with the first three pleomeres distinct. This species is most closely related to <i>P</i>. <i>perplexa</i>, but <i>P</i>. <i>perplexa</i> females have an asymmetrical body, lack eyes, have the posterolateral point of oostegite 1 acute, and the palp of the maxilliped triangular. <i>Alpheus microstylus</i> is also known to be infested by <i>Bopyrione toloensis</i> Markham, 1982.</p> <p> KEY TO THE 28 SPECIES OF <i>PARABOPYRELLA</i> MARKHAM, 1985, BASED ON MALE AND FEMALE CHARACTERS</p> <p>1a. Posterior edge of female pleotelson entire.. 2</p> <p>1b. Posterior edge of female pleotelson not entire........................... 15</p> <p>2a. Posterior edge of female pleotelson truncate or very weakly convex........... 3</p> <p>2b. Posterior edge of female pleotelson strongly convex.................... 4</p> <p> 3a. Body symmetrical.... <i>P</i>. <i>symmetros</i> <i>,</i> n. sp.</p> <p> 3b. Body asymmetrical............................ <i>P. perplexa</i> Markham, 1990</p> <p>4a. Posterior edge of female pleotelson rounded.. 8</p> <p>4b. Posterior edge of female pleotelson not rounded......................... 5</p> <p>5a. Anterior margin of female head crenulated</p> <p>............. <i>P. crenulata</i> (Shiino, 1939) 5b. Anterior margin of female head smooth.. 6 6a. Dorsolateral bosses reduced on both sides</p> <p> of female pereon............. <i>P. choprai</i></p> <p>(Nierstrasz and Brender à Brandis, 1929) 6b. Dorsolateral bosses on at least one side of female’ s first four pereomeres......... 7 7a. Distal margin of female pleotelson acute</p> <p>........... <i>P. delagoae</i> (Bourdon, 1982) 7b. Distal margin of female pleotelson blunt</p> <p>.......... <i>P. angulosa</i> (Bourdon, 1980a) 8a. Coxal plates and dorsolateral bosses of female absent... <i>P. setoensis</i> (Shiino, 1939) 8b. Coxal plates and dorsolateral bosses of female present.................... 9 9a. Lateral margin of pleon of male deeply indented......................... 10 9b. Lateral margin of pleon of male slightly indented......................... 12 10a. Median of female pleon fused, segments obscure......... <i>P. angusta</i> (Shiino, 1963) 10b. Median of female pleon not fused, only last two pleomeres fused................ 11 11a. Male with five pairs of pleopods........</p> <p>........... <i>P. nierstraszi</i> (Chopra, 1930) 11b. Male with four pairs of pleopods.......</p> <p>........... <i>P. tanyensis</i> (Bourdon, 1979) 12a. Female barbula with one pair of lateral projections................. <i>P. saronae</i></p> <p>(Bourdon and Bruce, 1979) 12b. Female barbula with two pairs of lateral projections....................... 13 13a. First oostegite with long posterior portion</p> <p>... <i>P. essingtoni</i> (Bourdon and Bruce 1983) 13b. Oostegite 1 with short posterior portion.. 14 14a. Pleon of male much broader than pereon</p> <p>......... <i>P. richardsonae</i> (Nierstrasz and</p> <p> Brender à Brandis, 1929) 14b. Pereon of male equal to or broader than pleon...... <i>P. mortenseni</i> (Nierstrasz and</p> <p> Brender à Brandis, 1929) 15a. Distal edge of female pleon deeply separated........................ 16 15b. Distal edge of female pleon slightly indented......................... 17 16a. Pereon of female much wider than pleon........... <i>P. lata</i> (Nierstrasz and</p> <p> Brender à Brandis, 1929) 16b. Pereon of female equal to or slightly wider than than pleon.......... <i>P. megatelson</i></p> <p>(Nierstrasz and Brender à Brandis, 1929)</p> <p>17a. Divergent pleotelson of female terminally rounded......................... 18</p> <p>17b. Divergent pleotelson of female not terminally rounded...................... 20</p> <p> 18a. Male with slender pleon, all segments fused, without lateral indentations...... <i>P. thomasi</i> (Nierstrasz and Brender à Brandis, 1929)</p> <p>18b. Male with broad pleon, lateral indentations indicating segments............. 19</p> <p> 19a. Barbula of female with one pair of lateral projections.... <i>P</i>. <i>intermedia</i> (Nierstrasz and Brender à Brandis, 1923)</p> <p> 19b. Barbula of female with two pairs of lateral projections.... <i>P. distincta</i> (Nierstrasz and Brender à Brandis, 1923)</p> <p>20a. Pleotelson of female divergent and terminally quadrate..................... 21</p> <p>20b. Pleotelson of female slightly divergent, terminus with two points............... 25</p> <p> 21a. Male with uropods............................... <i>P. pacifica</i> (Shiino, 1933)</p> <p>21b. Male without uropods............... 22</p> <p>22a. Male pleomeres not completely fused... 23</p> <p>22b. Male pleon fused, segments indicated only by lateral indentations............... 24</p> <p> 23a. Male pleon segments indicated by dorsal obscure sutures and deep lateral indentations......... <i>P. barnardi</i> (Nierstrasz and Brender à Brandis, 1931)</p> <p> 23b. Male pleon segments without any fusion, distinct............. <i>P</i>. <i>cuspidata</i> <i>,</i> n. sp.</p> <p> 24a. Female with eyes................................ <i>P. elongata</i> (Shiino, 1949)</p> <p> 24b. Female without eyes........................ <i>P. australiensis</i> (Bourdon, 1980a)</p> <p>25a. Pleomeres of male fused, with very weak lateral indentations................. 26</p> <p>25b. Pleomeres of male fused only medially... 27</p> <p> 26a. Male first two pleomeres with midventral tubercles...... <i>P. bonnieri</i> (Nierstrasz and Brender à Brandis, 1923)</p> <p> 26b. Male first pleomere only with midventral tubercle........ <i>P. incisa</i> (Chopra, 1923)</p> <p> 27a. Male first two pleomeres much wider than pleon........ <i>P. hodgarti</i> (Chopra, 1923)</p> <p> 27b. Male first pleomere only wider than pleon....... <i>P. indica</i> (Chopra, 1923)</p>Published as part of <i>An, Jianmei, Boyko, Christopher B. & Li, Xinzheng, 2015, A Review Of Bopyrids (Crustacea: Isopoda: Bopyridae) Parasitic On Caridean Shrimps (Crustacea: Decapoda: Caridea) From China, pp. 1-85 in Bulletin of the American Museum of Natural History 2015 (399)</i> on pages 59-61, DOI: 10.1206/amnb-921-00-01.1, <a href="http://zenodo.org/record/4612506">http://zenodo.org/record/4612506</a>
Parabopyrella cuspidata An & Boyko & Li 2015, n. sp.
No full textParabopyrella cuspidata, n. sp. Figure 13 Parabopyrella cuspidatus An, 2006: 85–86, fig. 40 (unavailable name). MATERIAL EXAMINED: Infesting Alpheus digitalis De Haan, 1844, holotype ♀ (CIEAL 560301), allotype ♂ (CIEAL 560302), Haimen, Jiangsu Province, 121 ° 15′E, 31 ° 54′N, 12–14 March 1956, coll. Ruiyu Liu and Zhengang Fan. DESCRIPTION: Holotype female (CIEAL 560301): Length 9.24 mm, maximal width 5.53 mm, head length 2.06 mm, head width 2.1 mm, distorted 22 ° (fig. 13A, B). Head fused with first pereomere except in anterolateral corners, obscure posterior margin sharply curved and anterior margin of head irregular. Small black eyes near posterior margin of head (fig. 13A). Antennule of three articles, antenna of five articles. Maxilliped articulated with triangular palp laterally fringed with setae (fig. 13C, D). Barbula with two pairs of short falcate lateral projections on each side (fig. 13E). Pereon broadest across third pereomere (fig. 13A). Pereomeres 2–5 medially fused. Coxal plates well developed on left side of all pereomeres and on right side of first four pereomeres. Round dorsolateral bosses on first four pereomeres. Brood pouch widely open (fig. 13B). Oostegite 1 (fig. 13F, G) with two articles, internal ridge bearing small simple projections, posterolateral point directed straight backward, distal portion of posterior edge fringed with setae. Posterior pereopods slightly larger (fig. 13H, I), carpi and meri smooth, dactyli short, bases of all pereopods produced into lobes. Pleon of six pleomeres, segments indicated by dorsal sutures and deep lateral indentations (fig. 13A), first five bearing biramous flaplike pleopods (fig. 13B), sixth pleomere incised medially, uropods lacking (fig. 13B). DESCRIPTION: Allotype male (CIEAL56 0302): Length 2.20 mm, maximal width across pereomere 4 0.82 mm, head width 0.47 mm, head length 0.28 mm. All segments distinct (fig. 13J, K). Head elliptical with curved posterior edge (fig. 13J), large black eyes near posterior margin of head (fig. 13J). Antennule of three articles with setae on distal article, antenna of one article, terminally smooth (fig. 13L). Pereomeres widest across fourth pereomere, lacking midventral projections (fig. 13K). All pereopods of similar size and structure, dactyli sharp but short (fig. 13M). Pleon of six distinct segments, without midventral projections, pleopods or uropods (fig. 13K). Sixth pleomere produced into two extend subacute lobes with medioventral anal cone (fig. 13K). ETYMOLOGY: The specific name, cuspidata, refers to the head of the female having a sharply curved posterior margin and an irregular anterior margin. HOST AND LOCALITY: Infesting Alpheus digitalis De Haan, 1844 (Alpheidae), Jiangsu Province, China. REMARKS: The new species belongs to the “C1” group with a medially incised pleotelson and can be distinguished from the other four species of the “C1” group by characters of oostegite 1, maxilliped, and the posterior margin of the head. The male of the new species differs from those of all other Parabopyrella species by the characters given below in (4). Parabopyrella cuspidata, n. sp., is most closely related to P. barnardi, but (1) the female of the new species bears a pleon with dorsal sutures and deep indentations on both sides (the female of P. barnardi has the pleon fused dorsally and with only the left side deeply indented), (2) the maxilliped of the new species has a triangular palp (P. barnardi with cylindrical palp), (3) the posterolateral point of oostegite 1 of the new species is sharp and backwardly directed (that of P. barnardi round and laterally directed), (4) the male of the new species has distinct pleomeres and laterally separated lobes on the pleotelson (male of P. barnardi with fused pleomeres and rounded pleotelson).Published as part of An, Jianmei, Boyko, Christopher B. & Li, Xinzheng, 2015, A Review Of Bopyrids (Crustacea: Isopoda: Bopyridae) Parasitic On Caridean Shrimps (Crustacea: Decapoda: Caridea) From China, pp. 1-85 in Bulletin of the American Museum of Natural History 2015 (399) on pages 48-50, DOI: 10.1206/amnb-921-00-01.1, http://zenodo.org/record/461250
Fig. 12 in Abdominal bopyrid parasites (Crustacea: Isopoda: Bopyridae: Athelginae) of diogenid hermit crabs from the western Pacific, with descriptions of a new genus and four new species
No full textFig. 12. Parathelges aniculi (Whitelegge, 1897) Form B, scanning electron micrographs of cryptoniscus larva, USNM 1283385 (A-F). A, ventral view; B, head, dorsal view; C, right antennule, ventral view; D, right antenna, laterodorsal view; E, right pereopods 1–4; F, right pereopods 5–7. Scale bars = 200 µm [A], 100 µm [B, D], 50 µm [C, E, F].Published as part of <i>Williams, Jason D. & Boyko, Christopher B., 2015, Abdominal bopyrid parasites (Crustacea: Isopoda: Bopyridae: Athelginae) of diogenid hermit crabs from the western Pacific, with descriptions of a new genus and four new species, pp. 33-69 in Raffles Bulletin of Zoology 64</i> on page 56, DOI: <a href="http://zenodo.org/record/10108824">10.5281/zenodo.10108824</a>
Aegophila cappa Williams & Boyko 2021, n. sp.
No full textAegophila cappa n. sp. (Figs 1; 2) urn:lsid:zoobank.org:act: 4FF870BA-A6D1-4A86-87AE-84160A0EA65F “parasite” – Richardson 1909: 125, figs 49, 50. “eine Form ohne Namen auf dem Isopode Aega symmetrica vom Behring-Meer” – Nierstrasz & Brender à Brandis 1931: 220. “ Aegophila socialis sp. nov.?” – Bresciani 1966: 108-109, fig. 6 (after Richardson 1909) (not A. socialis Bresciani, 1966). TYPE MATERIAL. — Holotype. Bering Sea • USNM 39524; ovigerous female (3.4 mm W, 2.4 mm L); attached to pereopod of Aegiochus symmetricus (Richardson, 1905) (USNM 39293); Sta. 4772; 54°30’30”N, 179°14’E; “Bowers Bank”; 344-372 fathoms (= 629- 680 m); coll. United States Bureau of Fisheries steamer Albatross, taken by 12-foot Tanner beam trawl (Anonymous 1907); 4.VI.1906. Allotype. Bering Sea • USNM 1616634; mature male (920 µm L); same data as for holotype. TYPE LOCALITY. — 54°30’30”N, 179°14’E, “Bowers Bank”, Bering Sea, 629- 680 m. TYPE HOST. — Aegiochus symmetrica (Richardson, 1905) [Crustacea: Isopoda: Aegidae] (originally as Aega symmetrica in Richardson, 1909; see WoRMS 2008b onwards). ETYMOLOGY. — The species name is derived from the Latin for cloak or cape (cappa), in reference to the fused oostegite 5 and lateral body wall of the female’s resemblance to a cloak drawn around the body. The gender is feminine. DISTRIBUTION. — Known only from the type locality and type host. DESCRIPTION Female Body (Fig. 1A, B) semicircular, approximately 1.25 times as wide as maximum length, dorsoventrally flattened, with pair of broad lateral lamellae filled with numerous embryos; lateral lamellae not reaching beyond frontal margin of cephalon. Cephalon (Fig. 1 A-C) indistinctly dorsally separated from pleon, without eyes. Antennules and antennae apparently absent. Oral cone (Fig. 1B, D) with flaring rounded mandibles, extended, distal surface covered with scale-like structures; posterior margin of oral cone with two finger-like projections. Maxillipeds subquadrate (Fig. 1E). Pereon with few faint transverse and longitudinal folds in cuticle (Fig. 1A). Pereopods 1-5 subequal in size and shape, without setae (Fig. 2 F-I, K); dactylus short but highly recurved, propodus and carpus fused, carpus expanded into cup receiving tip of dactylus, basis elongate. Oostegite 1 ovate, expanded, few small setae on posterior margin (Fig. 1H); oostegite 2 slender, rounded at narrowed distal tip, fringe of setae on proximoventral margin (Fig. 1I); oostegite 3 broader than 2, fringe of thick setae on proximoventral margin (Fig. 1J); oostegite 4 subquadrate, fringe of thick setae on proximoventral margin (Fig. 1K); oostegite 5 fused with lateral pleon, medioventral area with region of setae and small, rounded lobe (Fig. 1B, L). Pleon segments fused, minute, vermiform, without lateral plates or pleopods (Fig. 1B). Male Body not recurved ventrally (Fig. 2A). Cephalon wider than long (Fig. 2A, B), fused with pereomere 1, anterior margin rounded, posterolateral margins (pereomere 1) as small, rounded lobes; lacking eyes, cephalic slits present. Antennules each as single flattened lobe with five or six long setae on medial and distal margins (Fig. 2B, C). Antennae of three segments each with single distal thin flagellum (Fig. 2B, C). Oral cone triangular (Fig. 2B, C). Pereomeres 2-7 distinct, 4-6 subequal in width, others narrower (Fig. 3B); lateral margins of pereomeres 2-7 extended ventrally, with multiple thin setae on margins (Fig. 2B, E). Pereopods with all segments distinct; 1, 2 each with recurved dactylus approximately as long as rounded propodus (Fig. 2 B-D), 3-7 with recurved dactylus approximately 25% as long as slender elongate propodus (Fig. 2E); all ischia and bases elongate. Pleon elongate, subtriangular, segments fused but faint indication of pleomere 1 by rounded lobes and presence of lateral setae similar to those on pereomeres 2-7 (Fig. 2A, B); pleon tapering posteriorly with small distal rounded protrusion bearing terminal setae surrounding anal slit (Fig. 2A, B); pleopods lacking. REMARKS The new species is clearly conspecific with Aegophila socialis; females of both species show dorsoventral compression of the body, lack of antennules and antennae, expanded, clublike mandibles, the same arrangement of oostegites 1-4, the presence of a rounded knob and fringe of thin papillae on the mediovental margin of oostegite 5, as well as fusion of the fifth oostegites with the ventral body wall, and the pleon being a small, unsegmented protuberance. Males of the two species are similar in having fusion of the cephalon with the first pereomere and presence of rounded posterolateral lobes corresponding to the side of pereomere 1, the antennules as unsegmented flaps fringed by setae, and the pleon with all segments fused and lacking pleopods. Diagnostic differences between females of the two species include: oostegite 1 large, ovate in A. cappa n. sp. (small, “spoon-like” in A. socialis), oostegite 2 narrow in A. cappa n. sp. (broad in A. socialis), and oostegite 4 subquadrate in A. cappa n. sp. (ovate in A. socialis). Bresciani (1966) described A. socialis as lacking maxillipeds, but they are clearly present in A. cappa n. sp. and it is unclear if he overlooked them or if they are truly lacking in A. socialis; the latter appears unlikely since maxillipeds are required for oxygenation of the brood (Gilson 1909; Cericola & Williams 2015). Bresciani (1966) described the pereopods of A. socialis as “small and badly segmented, and do not show any special characters” but did not illustrate them well. In A. cappa n. sp., the pereopods have highly recurved dactyli and show fusion only of the propodus and carpus, with the carpus inner margin being expanded as a cup for insertion of the dactylus. The males of the two species differ in the form of the antennae (multisegmented with a single flagellum in A. cappa n. sp. vs a single segment with a single flagellum in A. socialis) and the shape of the pleon (much longer than wide in A. cappa n. sp. vs length and width subequal in A. socialis). Bresciani (1966) did not describe the pereopods in detail but did illustrate them. His illustrations appear to show a difference in pereopods 1 and 2 (rounded propodus with typically recurved dactylus) vs 3-7 (elongate propodus and highly recurved dactylus) that is also seen in A. cappa n. sp. However, he drew pereopod 1 as having the propodus and carpus fused whereas in A. cappa n. sp., they are distinct. It is not clear which specimen of Aegiochus symmetrica was the host of A. cappa n. sp. as all the of the potential host aegids collected at the parasite’s type locality (Sta. 4772, USNM 39293) have their legs intact and no evidence of damage is visible; however, a label reading “1 sent to W. W. Alpator / Jan 1923 ” is present in the jar and it is possible that this gifted specimen was the (now lost) host specimen of the holotype of A. cappa n. sp.Published as part of Williams, Jason D. & Boyko, Christopher B., 2021, Out on a limb: novel morphology and position on appendages of two new genera and three new species of ectoparasitic isopods (Epicaridea: Dajidae) infesting isopod and decapod hosts, pp. 79-100 in Zoosystema 43 (4) on pages 82-83, DOI: 10.5252/zoosystema2021v43a4, http://zenodo.org/record/455546
Marojejy longimerus Cumberlidge & Boyko & Harvey 2002, n. sp.
No full text<i>Marojejy longimerus</i> n. sp. <p>(®gures 1± 3)</p> <p> <i>Material examined.</i> HOLOTYPE: male adult (cw 23, cl 15.1, ch 7.45, fw 5.9 mm) (AMNH 18345), under rocks, at source of Andranomifototr a river (14 <i>ss</i> 26 <i>¾</i> 8 <b>²</b> S, 49 <i>ss</i> 44 <i>¾</i> 1 <b>²</b> E), 1,875 m, 11 km north-west of Manantenina, Province d’ Antsiranana, ReÂserve Naturelle InteÂgrale de Marojejy, <b>Madagascar</b>, leg. E. Quinter, 13± 19 November 1996. PARATYPES: subadult female (cw 15.1, cl 11.3, ch 5.4, fw 4.5 mm), juv. male (cw 11.1, cl 8.4, ch 4.5, fw 3.1 mm) (AMNH 17833); four males (cl 13.0± 14.7 mm), ®ve females (cl 12.2±14.2 mm) (FMNH 4656), under rocks, at source of Andranomifototr a river (14 <i>ss</i> 26 <i>¾</i> 8 <b>²</b> S, 49 <i>ss</i> 44 <i>¾</i> 1 <b>²</b> E), 1,875 m, 11 km north-west of Manantenina, Province d’Antsiranana, ReÂserve Naturelle InteÂgrale de Marojejy, <b>Madagascar</b>, leg. E. Quinter, 13± 19 November 1996; ovigerous female (cl 13.1 mm) (AMNH 17831), three males (cl 12±14.2 mm) (AMNH 17834), along tributary at head of Andranomifototr a River (14 <i>ss</i> 26 <i>¾</i> 4 <b>²</b> S, 49 <i>ss</i> 44 <i>¾</i> 5 <b>²</b> E), 1,625 m, 10.5 km northwest of Manantenina, Province d’Antsiranana, ReÂserve Naturelle InteÂgrale de Marojejy, <b>Madagascar</b>, leg. E. Quinter and S. M. Goodman, 6± 12 November 1996.</p> <p> <i>Diagnosis.</i> As for genus.</p> <p> <i>Description.</i> Based on holotype, an adult male from Marojejy, Madagascar, cw 23.0 mm (AMNH 18345). Carapace ovoid outline, high (ch/fw 1.26), extremely wide anteriorly (cw/fw 3.8), tapering sharply posteriorly; posterior margin straight, relatively wide (0.33 cw). Anterolateral regions of carapace granular, rest of dorsal carapace smooth; semi-circular, urogastric, cardiac grooves shallow; cervical grooves deep, long, ending before meeting postorbital crests. Epigastric crests lying posterior to epibranchial teeth; postorbital crests low, indistinct, aligned with, but not joined to, epigastric crests; postorbital crests fading laterally before meeting epibranchial teeth; front slightly indented, margin thin, raised, smooth; front moderately deēxed, not meeting inferior margin of antennulular fossae; epistomial tooth triangular, deēxed, granulated. Exorbital angle low, lacking tooth, continuous with anterolateral margin. Epibranchial tooth reduced to small granule; anterolateral margin between exorbital angle and epibranchial tooth short, lacking intermediate tooth; anterolateral margin granular, curving sharply outward, posterior end curving inward, not continuous with posterolateral margin of carapace. Eyestalk tapering sharply distally, cornea very reduced; suborbital margin smooth. Subhepatic, pterygostomial regions of carapac e sidewall granulated, suborbital region smooth. Vertical sulcus on carapace sidewall granular, curving, running from base of epibranchial tooth to epimeral sulcus, separating suborbital from subhepatic region, dividing carapace sidewall into three parts.</p> <p>Mandibular palp two-segmented, terminal segment bilobed, with medium-sized anterior process (about 0.5 as large as terminal segment) arising from junction between segments. Exopod of third maxilliped medium length, reaching to midpoint of merus; exopod with distinctly reduced, but still substantial, ¯agellum; ischium with faint, shallow, vertical groove. First sternal sulcus s1/s2 short but visible; second sternal sulcus s2/s3 deep, completely crossing sternum, s2 distinctly lower than s3. Sternal sulcus s3/s4 consisting of two short notches at edges of sternum, continuing over s4 as shallow, barely visible, v-shaped groove whose point meets granulated anterior margin of sterno-abdominal cavity midway along s4. Anterior sternum appearing smooth, but sparse short hairs visible under magni®cation. Episternal sulci s4/e4, s5/e5, s6/e6, s7/e7 smooth, all lacking visible groove. Sternite s5 with pair of sternal knobs (`bouton-pressions ’ of Guinot, 1977). Last ®ve segments of adult male abdomen (a3 to a7) forming triangle, a3 widest, telson (a7) narrowest. Telson with straight sides, triangular, not bell-shaped; a6 long, almost as long as width of distal margin of a6. Sternal groove s4/s5 meeting a7 close to junction between a7/a6; s5/s6 meeting a 6 in middle of segment, s6/s7 meeting a5 just short of a5/a6 junction.</p> <p>Terminal article of gonopod 1 relatively short (ratio of length of terminal article to subterminal segment 0.3), longitudinal groove on terminal article wide near junction, narrowing sharply distally, clearly visible on ventral, superior sides, not visible on dorsal side; lateral, medial folds on ventral terminal article equal in height, width; terminal article cone-shaped, almost straight, directed slightly outward; slim, tapering to upcurved tip with clear apical opening; subterminal segment of gonopod 1 with distinct, raised, rounded shoulder on external margin near junction with terminal article. Junction between terminal article and subterminal segment of gonopod 1 not clear on ventral side, but marked by deep sulcus dorsally; gonopod 1 with broad dorsal membrane. Gonopod 2 longer than gonopod 1; terminal article of gonopod 2 ¯agellum shorter than subterminal segment (ratio length terminal article to subterminal segment 0.7).</p> <p>Merus, carpus, propodus, dactylus of P1 all elongated, chelipeds both extremely elongated: ratio of total length of chelipeds (from ischium to dactylus) to cw (P1/cw) 2.7 (right), 2.3 (left). Dactylus of right, left chelipeds relatively slim (one-third height of palm); upper margin of dactylus smooth; ®nger of propodus slim (one-third height of palm), lower margin of propodus of cheliped slightly indented. Finger of propodus with large, fused molar tooth in proximal region, rest of propodus and dactylus with series of small teeth, closed ®ngers leaving long, narrow interspace. Inner margin of inferior face of ischium of pereiopod 1 with two small teeth; outer margin smooth. Inner margin of inferior face of merus of pereiopod 1 lined by row of small uneven teeth, outer margin lined by small even teeth; low, faint tooth in middle of distal margin; superior surface of merus rough, granulated. Inner margin of carpus of pereiopod 1 with two large teeth, second about half size of ®rst; ®rst carpal tooth broad, triangular, blunt, second carpal tooth small, low, blunt. Merus, carpus, propodus, dactylus of P2 to P5 all elongated, walking legs slender: ratio of total length of P2/cw to P5/cw 1.36, 1.47, 1.53, 1.23 respectively. Inner margins of propodi of P2 to P5 smooth.</p> <p> <i>Size.</i> Largest known specimen is the male holotype, cw 23 mm.</p> <p> <i>Colour.</i> Carapace, eyestalks, chelipeds uniformly pale orange. Merus of cheliped with dark brown wash, ®ngertips pale white. Merus, carpus of walking legs pale white with pale orange mottling; mottling decreasing on propodus and dactylus.</p> <p> <i>Distribution.</i> Madagascar.</p> <p> <i>Type locality.</i> Andranomifototr a river (14 <i>ss</i> 26 <i>¾</i> 8 <b>²</b> S, 49 <i>ss</i> 44 <i>¾</i> 1 <b>²</b> E), 1,875 m, 11 km north-west of Manantenina, Province d’Antsiranana, ReÂserve Naturelle InteÂgrale de Marojejy, Madagascar.</p> <p> <i>Comparisons. Marojejy longimerus</i> is super®cially similar to other small long-legged crabs found in Madagascar (<i>Gecarcinautes</i>, <i>Madagapotamon</i> and <i>Skelosophusa</i>) but can be distinguished from these taxa by the characters discussed above for the genus.</p> <p> <i>Remarks.</i> The ReÂserve Naturelle InteÂgrale de Marojejy is a 60,000 ha reserve in north-east Madagascar, north of Andapa, that includes the Marojejy mountains and consists of a continuous steep climb from 100 m to over 2100 m. The vegetation in the reserve includes closed canopy forest, mountain woodland, and ericoid bush, and palms, ferns, orchids and balsams are abundant. Some of the fauna, including lemurs, birds and insects, is endemic to the reserve (Jolly <i>et al.</i>, 1984).</p>Published as part of <i>Cumberlidge, Neil, Boyko, Christopher B. & Harvey, Alan W., 2002, A new genus and species of freshwater crab (Crustacea, Decapoda, Potamoidea) from northern Madagascar, and a second new species associated with Pandanus leaf axils, pp. 65-77 in Journal of Natural History 36 (1)</i> on pages 67-71, DOI: 10.1080/00222930010003800, <a href="http://zenodo.org/record/5298434">http://zenodo.org/record/5298434</a>
- …
