5,083 research outputs found
Eremitione lata Boyko & Williams 2023, n. comb.
No full textEremitione lata (Shiino, 1958) n. comb. = Parapseudione lata Shiino, 1958 Distribution: Japanese and Russian sides of the Sea of Japan (Shiino 1958; Kornienko et al. 2018). Hosts: Pagurus brachiomastus (Thallwitz, 1891), P. middendorfii Brandt, 1851, P. minutus Hess, 1865, P. ochotensis Brandt, 1851 (Shiino 1958; Kornienko et al. 2018) Remarks: Parapseudione lata cannot remain in Parapseudione as that genus is synonymized with Pleurocrypta in the present work (see below). Aside from the female having four pairs of biramous pleopods and one pair of uniramous pleopods, all the characters of the females and males indicate that this species belongs to Eremitione, and we transfer it to that genus herein. Markham (1986) and Boyko & Williams (2004) suggested that P. lata might be a synonym of Pseudione hyndmanni (Spence Bate & Westwood, 1867). However, given the geographic distance between Japan and Europe, as well as several morphological differences (e.g., smooth oostegite 1 internal ridge in E. lata vs. digitate in P. hyndmanni; male without pleopods in E. lata vs. with pleopods in P. hydmanni; see Bourdon 1968), we retain E. lata as a distinct species.Published as part of 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) on page 259, DOI: 10.11646/zootaxa.5258.3.1, http://zenodo.org/record/778021
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
Cumoechidae Boyko & Williams 2023, n. fam.
No full textFamily Cumoechidae n. fam. <p>(Fig 4J)</p> <p>https://zoobank.org/ urn:lsid:zoobank.org:act: 603E3A47-7E2D-454E-A42A-F0D7CA01656C</p> <p> <b>Diagnosis:</b> Epicaridium larva with antennules as long as body; setae on antennules and uropodal exopod and endopod as long as or longer than body. Cryptoniscus larva/male body elongate. Head longer than wide, conical, posterior margin no wider than pereomere 1; eyes absent. Antennule article 1 elongate with ca. 16 marginal acute teeth. Coxal plates with posterior margins toothed. Pereopods 1–3 gnathopodal, 4–7 ambulatory with propodi tapering distally, dactyli as long as propodi. Pleotelson margin with 10 teeth, distalmost pair longest. Mature female spheroid in dorsal view, dorsoventrally compressed, segmented, ventral surface with long median cleft and raised segmented pad surrounding cleft; anterior region with reduced antennae and pair of pereopods. Parasitizing cumaceans.</p> <p> <b>Included genus and species:</b> <i>Cumoechus</i> Hansen, 1916, type genus (type species = <i>Cumoechus insignis</i> Hansen, 1916 by monotypy).</p> <p> <b>Distribution:</b> South of Jan Mayen, Norway (69°31’N, 07°06’W), 1309 fms (2394 m); northwest of the Faeroes, Denmark (63°26’N, 07°56’W and 61°08’N, 09°28’W), 436–471 fms (797–861 m); southwest of the Faeroes, Denmark (61°08’N, 09°28’W), 436 fms (797 m) (Hansen 1916).</p> <p> <b>Hosts:</b> Cumacea: <i>Diastylis echinata</i> Spence Bate, 1865, <i>D. polaris</i> G. O. Sars, 1871, <i>Hemilamprops cristatus</i> (G. O. Sars, 1870) (Hansen 1916).</p> <p> <b>Remarks:</b> Nierstrasz & Brender à Brandis (1931) noted similarities between the females of the nebaliacean parasite <i>Apocumoechus paranebaliae</i> Nierstrasz & Brender à Brandis, 1931 and <i>Cumoechus insignis</i> Hansen, 1916 and placed both species in Cabiropidae, although with hesitation and noting that the cabiropids represented a heterogenous grouping. Danforth (1970) proposed a new subfamily of Cryptoniscidae, Apocumoechinae, to contain the nebaliacean parasite and another new subfamily, Cumoniscinae, to include <i>Cumoniscus</i> Bonnier, 1903 and <i>Cumoechus</i>; this work was not published (i.e., not recognized by the ICZN) and there were no characters provided to differentiate these taxa. These subfamily names were also mentioned by Adkison (1990) in his unpublished dissertation. Trilles (1999) placed <i>Cumoechus</i> in Apocumoechinae without comment and, again, provided no characters to differentiate Apocumoechinae from other taxa. Trilles (1999) also mentioned Cumoniscinae but it appears that he considered it to be a synonym of Apocumoechinae. Although Apocumoechinae has never been made available, Cumoniscidae is an available name from Nierstrasz & Brender à Brandis (1923; see Boyko & Boxshall 2018) but the type genus <i>Cumoniscus</i> is a tantulocaridan, not an epicaridean, and <i>Cumoechus</i> does not belong to this family.</p> <p> It is clear from the characters of the females, cryptoniscus larvae/males, and epicaridium larvae of <i>Cumoechus insignis</i>, that this genus and species does not belong in Cabiropidae (see Boyko 2013). We consider the characters of <i>C</i>. <i>insignis</i>, in particular those of the cryptoniscus larva, to indicate that this genus and species belongs in its own family, Cumoechidae <b>n. fam.</b></p> <p> The female of <i>C</i>. <i>insignis</i> is superficially similar to that seen in species of <i>Clypeoniscus</i> Giard & Bonnier, 1895 (Cabiropidae), particularly in the structure of the appendages: compare Hansen (1916: pl. 16, fig 5b, herein Fig. 4J) with Giard & Bonnier (1895: pl. 8, fig 22), but there are no lateral lobes in <i>C</i>. <i>insignis</i> (Hansen 1916: pl. 16, fig 5a). The cryptoniscus larva of <i>C</i>. <i>insignis</i> (slender body, elongate antennule basal segment, antennule peduncular segment 2 with large distal teeth, pereopods 1–3 prehensile, uropodal exopod and endopod slender and elongate; see Hansen 1916: pl. 16, fig 5c, e, f, i) is very different from that seen in species of <i>Clypeoniscus</i> (short, tear-drop shaped body, short antennular basal segment, antennule peduncular segment 2 without large distal teeth, pereopods 1, 2 prehensile, uropodal exopod and endopod stout and short). Likewise, the epicaridium larvae are different, with those of <i>Cumoechus insignis</i> (Hansen 1916: pl. 16, fig 5k) having the antennules as long as the body and setae on the antennules and uropods that are as long as or longer than the length of the body while the antennules, antennular setae, and uropodal setae of <i>Clypeoniscus</i> species are much shorter than the body.</p> <p> The unusual epicaridium larva of <i>Cumoechus insignis</i> superficially resembles that of <i>Scalpelloniscus vomicus</i> Hosie, 2008 (Hemioniscidae) as both have antennules, antennular setae and uropodal setae that exceed the length of the body. However, the seta on the distolateral corner of the uropodal sympod is shorter than the exopod in <i>C</i>. <i>insignis</i> and the anal tube is much shorter than the exopod while the epicaridium larva of <i>S</i>. <i>vomicus</i> have setae on the sympod that are more than three times as long as the exopod and the anal tube is as long as the exopod.</p> <p> The female of <i>Apocumoechus paranebaliae</i> is much less well described than that of <i>C</i>. <i>insignis</i> and no larval stages are known. From the limited data presented by Nierstrasz & Brender à Brandis (1931), it appears that <i>Apocumoechus</i> may be closer to <i>Clypeoniscus</i> than to <i>Cumoechus</i> but new collections and redescription of the type species are needed.</p> <p> Hansen (1916) figured specimens from three different collections and two different host species. Nielsen & Str̂mberg (1965) indicated the specimens (all syntypes) of <i>Cumoechus insignis</i> from the three different hosts might not “all belong to the same species” but this was speculative as they examined no specimens.</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 pages 260-261, DOI: 10.11646/zootaxa.5258.3.1, <a href="http://zenodo.org/record/7780211">http://zenodo.org/record/7780211</a>
Akrophryxus milvus Williams & Boyko 2021, n. sp.
No full textAkrophryxus milvus n. sp. (Figs 3-5, 11Q, R) urn:lsid:zoobank.org:act: AC0E5AFB-69BB-434D-86A6-A679F9EACDBC “sacculinid (? parasite attached to antennular fossa)” – Castro 2013: 443. TYPE MATERIAL. — Holotype. Madagascar • MNHN-IU-2014-20314; ovigerous female (3.1 mm diameter), attached to left antennule of male Ethusa machaera Castro, 2005 (9.2 mm CL, 9.0 mm CW; MNHN-IU-2010-1997); Sta. CP 3595; 25°35’28.2012’’S, 44°15’25.2’’E; south of Pointe Barrow; 821-910 m; coll. Bouchet et al. on the shrimper Nosy Be 11; ATIMO VATAE expedition, collected by trawling; 12.V.2010. Allotype. Madagascar • MNHN-IU-2014-20315; mature male (740 µm L); same data as for holotype. TYPE LOCALITY. — 25°35’28.2012”S, 44°15’25.2”E, Madagascar, south of Pointe Barrow, 821- 910 m. TYPE HOST. — Ethusa machaera Castro, 2005 [Crustacea: Brachyura: Ethusidae]. ETYMOLOGY. — The species name is derived from the Latin for “kite” in reference to the plate partially surrounding the host antennule that is reminiscent of the shape of a kite shield, defensive armor used primarily in Western Europe in the 10th-13th centuries. The gender is masculine. DISTRIBUTION. — Known only from the type locality and type host. DESCRIPTION Female Body spheroid, length and width nearly equal, filled with numerous eggs (Figs 3A, B; 4A, C-G). Cephalon externally indistinguishable from pereon, without eyes. Antennules absent, antennae each as oblong flat plate lateral to oral cone, covered with minute scales (not shown) (Figs 4G; 5G). Oral cone rounded (Fig. 4G); mouthparts indistinct. Maxillipeds ovate with recurved digitiform extension (Fig. 5H). Pereopods 1-5 subequal in size and shape, without setae (Figs 4G; 5E, F); dactylus short, recurved, propodus carpus and merus fused, ischia and bases stout. Oostegite 1 largest (Figs 4G; 5J), broadly ovate with small posterior accessory lobe, broad lobe medially divided in lateral view (Fig. 5K); oostegites 2/3, 4, 5 progressively larger; oostegite 2 present, thin and closely applied to oostegite 3, lobes subequal in size and shape (Fig. 5L); oostegite 3 subtriangular (Fig. 5L), expanded posteriorly, medial and anterior finger-like extensions present with small setae distally, oostegites 4 and 5 subquadrate, small setae on medial and posterior margins (Fig. 5M). Pleon presumably modified (see Discussion) as oblong, narrow, thickened plate (Fig. 4 A-G) partially surrounding host antennule with three circular medial holes: largest surrounding antennule of host and closest to mouthparts of parasite, smallest hole at midpoint of plate, intermediate sized hole farthest from mouthparts of parasite. Male Body not recurved ventrally (Fig. 5A, B). Cephalon fused with pereomere 1 (Fig. 5A, B), anterior margin rounded, posterolateral margins evenly rounded; lacking eyes, cephalic slits present. Antennules reduced, each apparently composed of three flattened disc-shaped segments (Fig. 5C); antennae each as single broad elongate lobes lateral to oral cone, flagella absent (Fig. 5C). Oral cone triangular (Fig. 5B, C). Pereomeres 2-6 distinct, 4-6 subequal in width, others slightly narrower (Fig. 5A, B); pereomere 7 fused with pleon, lateral margins recurved ventrally. Pereopods 1-6 subequal in size and shape, all segments distinct, carpi rounded, ischia short, bases elongate; dactylus, propodus and carpus with isolated marginal setae (Fig. 5 B-D); pereopod 7 lacking. Pleon compact, rounded, all segments fused and fused with pereomere 7, rounded posteriorly; anal slit and pleopods lacking (Fig. 5A, B). REMARKS The female of Akrophryxus milvus n. gen., n. sp. is very different from those in all other dajids, excepting Telephryxus clypeus n. gen., n. sp. (Table 1). The spheroid shape of the body and possession of a plate partially surrounding the host antennule are shared only by these two genera. The male of A. milvus n. gen., n. sp. is likewise very different from those in all other dajid genera (Table 2), including T. clypeus n. gen., n. sp. in having only six pairs of pereopods with no trace of the seventh pair (pereopod 7 of two elongate segments in the sole species of Oculophryxus and of one or two stub-like segments in T. clypeus n. gen., n. sp.). The male of A. milvus n. gen., n. sp. also differs from those in most genera in having the pleon fused with pereomere 7 (distinct from pereomere 7 in males in all other genera except Holophryxus Richardson, 1905 and Oculophryxus), and from all other genera in having a reduced antennule and an antenna with a single large segment (males of other genera with antennules of at least one well-developed segment and all with antennae segmented and with distal flagella). The female of A. milvus n. gen., n. sp. can be distinguished from that of T. clypeus n. gen., n. sp. in lacking antennules and in having three medial holes on the narrow, triangular attachment plate partially surrounding the host antennule with no additional lateral holes (T. clypeus n. gen., n. sp. has flattened antennules and a broad, subquadrate attachment plate partially surrounding the host antennule and having two large medial holes, the largest with two additional small lateral holes). The male of A. milvus n. gen., n. sp. can be distinguished from that of T. clypeus n. gen., n. sp. in having only six pairs of pereopods (six fully-developed pairs plus a rudimentary seventh pair of one or two small segments in T. clypeus n. gen., n. sp.), a reduced antennule and a single segmented antenna (large ovate single segmented antennule and two segmented short antennae in T. clypeus n. gen., n. sp.), and the short and rounded pleon fused to pereomere 7 (pleon distinct from pereomere 7, elongate and tapered pleon in T. clypeus n. gen., 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 85-86, DOI: 10.5252/zoosystema2021v43a4, http://zenodo.org/record/455546
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>
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
Eophrixus brevicauda An & Boyko & Li 2015, n. comb.
No full textEophrixus brevicauda (Chopra, 1923), n. comb. ? “Parasite” de Man, 1913: 263. Hemiarthrus brevicauda Chopra, 1923: 416, 419, 430, 431, 439–440, pl. 11, figs. 8–9. — Monod, 1933: 244. Phrixus (Paraphrixus) brevicauda: Caroli, 1930: 259. Paraphrixus brevicauda: Nierstrasz and Bren- der a Brandis, 1931: 205. — Markham, 1992a: table 1. ? Paraphrixus brevicauda: Markham, 1990: 563–564. MATERIAL EXAMINED: None. HOSTS AND LOCALITIES: Infesting Synalpheus hastilicrassus Coutière, 1905, S. tumidomanus tumidomanus (Paul’ son, 1875) (Alpheidae), Indonesia (?), Andaman Islands, Hong Kong, 2–9 fathoms (= 3.7–16.5 m). REMARKS: Markham (1985a) transferred the type species of Paraphrixus, Phryxus subcaudalis Hay, 1917, to Eophrixus, synonymizing the two genera. However, Markham (1990, 1992a) continued to use the combination Paraphrixus brevicauda while admitting (1990) that “ Paraphrixus is no longer a valid name, but revision of the genus is not appropriate here.” It is clear that, based on current data, Hemiarthrus brevicauda must be placed in Eophrixus, as this is the genus with which it shares the most characters and, as a synonymized genus, it cannot be used as a valid name. Rediscovery of E. brevicauda is desirable in order to determine whether it really belongs in Eophrixus, as Chopra’ s (1923) description is incomplete and the type specimens are inaccessible.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 page 67, DOI: 10.1206/amnb-921-00-01.1, http://zenodo.org/record/461250
Sigyn branchialis An & Boyko & Li 2015, n. sp.
No full textSigyn branchialis, n. sp. Figures 21C, D, 22, 23 Eophrixus branchialis An, 2006: 174, fig. 89 (unavailable name). MATERIAL EXAMINED: Infesting Alpheus digitalis De Haan, 1844, holotype ♀ (CIEAL 920301), Sanya, 18 ° 14′N, 109 ° 30′E, 23 March 1992. Allotype ♂ (CIEAL920301b), same locality as holotype. Female bopyrid parasiting right branchial chamber of host (fig. 21C, D). DESCRIPTION: Holotype female (CIEAL 920301a): Length 4.67 mm (including brood pouch), head length 0.67 mm, head width 0.67 mm. pereon length 0.78 mm (fig. 22A, B). Head length equal to width, eyes absent (fig. 22A). Head with frontal lamina. Only a single pair of antennae of five articles present (fig. 22C). Maxilliped with much larger anterior article, without palp, plectron highly blunted and not visible as distinct structure (fig. 22D). Barbula (fig. 22E) not located at exact bottom of maxilliped, inclines left, with seven to eight acute lobes on margin. First pereomere concealed by head, only visible lateral to head. Second to seventh pereomeres distinct only on short side (fig. 22A). Brood pouch large and completely closed (fig. 22B). Oostegite 1 (fig. 22F–I) with distinct asymmetry, left side much larger than right side. Oostegite 1 of left side (fig. 22F, G) with nearly smooth internal ridge, posterolateral point long and sharp, directed laterally. Oo‐ stegite of right side (fig. 22H, I) with smooth internal ridge, posterolateral point blunt and posteriorly directed. First two pereopods of long side near head, third pereopod attached to ventral surface of brood pouch, opposite head (fig. 22B). Fourth to seventh pleopods crowded near pleon (fig. 22B). All pereopods of short side arranged in a line (fig. 22A). Pereopods of same size and structure, with long bases and blunt dactyli (fig. 22J, K). Pleon of five pleomeres, first four pleomeres bearing uniramous flaplike pleopods and lateral plates. Fifth pleomere a bulging sphere, surface covered with tubercles (fig. 22L). DESCRIPTION: Allotype male (CIEA920302): Length 1.64 mm, maximal width (across pereomere 4) 0.52 mm, head length 0.16 mm, head width 0.36 mm, pleon length 0.44 mm. All pereon segments distinct (fig. 22M, 23A). Allotype attached at pereon/pleon boundary of holotype. Body elongate, sides nearly parallel except for rounded head and posterior abdomen (fig. 22M). Head subovate, wider than long, fused with pereomere 1. Small dark eyes near posterolateral corners (fig. 22M). Antennule of three articles, terminally setose (fig. 23C). Antenna of five articles, much longer than antennule, terminal two articles setose (fig. 22B). Pereomeres subequal in width, with truncate and setose margins (fig. 23D). All pereopods with similar structure and proportions, carpi and meri fused (fig. 23D, E). Flap-shaped scales with serrated edges on surface of ischia, meri, and carpi (fig. 23D, F). Propodi with many flap-shaped scales embedded in dactyli (fig. 23E), scale surfaces not smooth but covered with microscales (fig. 23G). Pereon without midventral projections, but with many setae on ventral surface of pereon (fig. 23H). Pleon fused into single piece, without pleopods or uropods, terminally setose (fig. 23J). ETYMOLOGY: The specific name, branchialis, refers to the type specimens found in the branchial chamber of the host. HOST AND LOCALITY: Infesting Alpheus digitalis De Haan, 1844 (Alpheidae), Hainan Province, China. REMARKS: The present specimens parasitize a caridean shrimp host, the female has a swollen brood pouch formed by the oostegites from one side of the body, asymmetrical oostegite 1, a highly distorted body, and the male has a fused pleon; therefore this species belongs to Hemiarthrinae. However, no genera in this subfamily described to date are known to infest the branchial chamber of their host shrimps. Most hemiarthrine species are ventral abdominal parasites, but a few are found parasitizing other parts of the shrimp hosts, such as the dorsal pleon (Filophryxus dorsalis Bruce, 1972b), or even embedded in the mouthparts (Orophryxus shiinoi, Bruce, 1972a). The closest position of a hemiarthrine species on a host to that found with Sigyn branchialis, n. gen., n. sp., is seen with Metaphrixus intutus Bruce, 1966, which is positioned over the host branchial chamber and is attached underneath a raised flange derived from the first abdominal pleuron of the host. The branchial mode of parasitism is considered to be the ancestral condition for bopyrids (see Boyko et al., 2013) and Sigyn branchialis, n. gen., n. sp., with its branchial position and full complement of pereopods on both sides of the female body may represent the most primitive hemiarthrine known to date. The present specimens differ sufficiently from other hemiarthrine genera and deserve generic status. The new genus is most closely related to Loki Markham, 1972, Eophrixus Caroli, 1930, Anisarthrus Giard, 1907, and Cataphryxus Shiino, 1936. Sigyn, n. gen., can be distinguished from those four genera by its mode of parasitism within the branchial chamber, female with uniramous pleopods and globular terminal pleomere, and male with fused pleon lacking any lateral notches or appendages. The differences are summarized in table 2. Additionally, the fourth pleopod of the female has a tubercle that may indicate an endopodite (fig. 22L). There are two saclike organisms parasitizing the abdomen of the host shrimp (fig. 21C). The more anterior specimen is a shriv‐ eled sac with a distinct mantle opening, indicating that it is a rhizocephalan. The posterior specimen also appears to be a rhizocephalan, is ovate and filled with eggs, but there is no mantle pore. It is unclear whether TABLE 2 Comparison of Sigyn n. gen. with Four Other Closely Related Hemiarthrine Genera these represent two species or different stages of development of female externae of the same species. The only rhizocephalans known from alpheids are members of Thylacoplethus Coutière, 1902 (Cirripedia: Rhizocephala: Akentrogonida), but neither of these belongs to that genus.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 72-75, DOI: 10.1206/amnb-921-00-01.1, http://zenodo.org/record/461250
Eophrixus caudatus An & Boyko & Li 2015, n. sp.
No full textEophrixus caudatus, n. sp. Figures 20, 21A, B Eophrixus shojii An, 2006: 172–173, fig. 88 (not Eophrixus shojii Shiino, 1941). MATERIAL EXAMINED: Infesting Alpheus microstylus (Bate, 1888) (fig. 17A, B), holotype ♀ (CIEAL 800501), allotype ♂ (CIEAL 800502): Xisha Coral Island, 16 ° 32′ N, 111 ° 36′E, 9–21 May 1980. DESCRIPTION: Holotype female (CIEAL 800501): Length 6.11 mm, including lateral plates, maximal width 4.43 mm, including brood pouch, head length 0.56 mm, head width 1.56 mm (figs. 20A, 21A, B). Body strongly asymmetrical, with swollen pereon. Head inserted into pereon, with bilobate anterior and posterior margins, without eyes (fig. 20A). Antennule of three articles, antenna of four articles, both setose, with stout bases (fig. 20C). Maxilliped rectangular, without palp, plectron blunt, anterior article 3 times larger than posterior article (fig. 20D). Barbula with two pairs of simple falcate lateral projections on each side (fig. 20E). Left side of body somewhat fused, but right side distinctly segmented with pereopods closely crowded together. Dorsolateral bosses and coxal plates absent. Swollen brood pouch completely closed (fig. 20A). Oostegite 1 (fig. 20F, G) with smooth internal ridge, posterolateral point rounded and directed laterally. Seven pereopods crowded together on short side, but first two pereopods on long side near head, third pereopod inserted in brood pouch, last four pereopods crowded between brood pouch and lateral plates. All pereopods slender, with long meri, dactyli longer in posterior pereopods (fig. 20H, I). Pleon with four pairs of lateral plates and biramous pleopods, segmentation indistinct. All lateral plates and exopodites of pleopods lobate, endopodites well developed (fig. 20B). Terminal pleomere with distinct uniramous uropods (fig. 20B). DESCRIPTION: Allotype male (CIEAL8 00502): Length 3.53 mm, maximal width (across pleon 4) 0.93 mm, head width 0.67 mm, head length 0.33 mm (fig. 20J, K). Head semicircular (fig. 20J), fused with first pereomere; small black eyes posterolaterally (fig. 20J). Antennule of three articles, almost smooth, antenna of six articles, terminal two articles setose (fig. 20L). All pereomeres subequal in width, lacking midventral projections (fig. 20K). All pereopods of same size and structure, carpi and meri terminally setose, dactyli blunt (fig. 20N). Pleon fused into single piece, without any pleopods; lateral margins straight, without any notches or incisions. Posterior margin of pleon with pair of fingerlike uropodal rami, anal cone in median (fig. 20M). ETYMOLOGY: The specific name, caudatus, refers to the female bearing a pair of distinct, forked, fingerlike uropods. HOST AND LOCALITY: Infesting Alpheus microstylus (Bate, 1888) (Alpheidae), Xisha (Paracel Islands), China. REMARKS: The female of the new species has a swollen brood pouch, seven pairs of pereopods on both sides, and the male has a fused pleon, indicating that the present specimens belong to Eophrixus. The new species can be distinguished from the other 10 well-described species by its unique forked fingerlike uropods. Eophrixus caudatus, n. sp., is most closely related to E. shojii Shiino, 1941, but the new species differs from E. shojii as follows: (1) the first lateral plates of the new species are almost equal in size to the others, whereas the first lateral plates of E. shojii are much smaller than the others; (2) the female of the new species has prominent forked uropods while the uropods of E. shojii are small and globular; (3) the male of the new species lacks any indentation or notch on the pleon margin, but the male of E. shojii shows a distinct series of indentations indicating the pleomeres.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 67-70, DOI: 10.1206/amnb-921-00-01.1, http://zenodo.org/record/461250
Septembopyrina tozeumaophila An & Boyko & Li 2015, n. sp.
No full textSeptembopyrina tozeumaophila, n. sp. Figure 19 Parabopyrina tozeumaus An, 2006: 74–75, fig. 32 (unavailable name). MATERIAL EXAMINED: Infesting Tozeuma lanceolatum Stimpson, 1860, holotype ♀ (CIE- HI790502 a), allotype ♂ (CIEHI790502 b), Beibu Gulf, Stn. 7905, 108 ° 30′E, 18 ° 30′N, 29 m, 6 January 1962, coll. Fuzeng Sun. Paratypes: 1 ♀, 2 ♂ (CIEHI620301), South China Sea, Stn. 6203, 109 ° 00′E, 18 ° 15′N, 23.8 m, 16 July 1959, coll. Fengshan Xu. Other material: 2 ♀♀, 1 ♂ (CIEHI790501), Beibu Gulf, Stn. 7905, 108 ° 30′E, 18 ° 30′N, 26 m, 16 August 1962, coll. Fuzeng Sun; 2 ♀♀ (CIEHI405401), East China Sea, Stn. 4054, 123 ° 30′E, 29 ° 30′N, 69 m, 8 December 1959, coll. Yongliang Wang and Jinzou Zhu; 1 ♀ (CIEHI590201), East China Sea, Stn. 4054, 123 ° 30′E, 29 ° 30′N, 86 m, 1 February 1959, coll., Jieshan Xu; 2♂♂ (CIEHI622201), Beibu Gulf, Stn. 6222, 108 ° 30′E, 18 ° 45′N, 23 m, 26 January 1959, coll. Zhengang Fan; 1 ♀ (CIEHI606601), South China Sea, Stn. 6066, 113 ° 30′E, 20 ° 30′N, 88 m, 9 April 1960, coll. Zhican Tang; 2 ♀♀ (CIEHI405402), East China Sea, Stn. 4054, 123 ° 30′E, 29 ° 30′N, 75 m, 7 April 1959, coll. Yulin Liao and Ming‐ shou Li. DESCRIPTION: Holotype female (CIEHI790 502a): Length 4.41 mm, maximal width 2.94 mm, head length 0.76 mm, head width 1.24 mm, slightly distorted (fig. 19A, B). Head an inverted trapezoid, lateral margin distinct, posterior margin fused and embed‐ ded in first pereomere. Head with large frontal lamina, boundary between head and frontal lamina obscure; without eyes (fig. 19A). Antennule and antenna of two and three articles, respectively, terminally without setae (fig. 19C). Maxilliped (fig. 19D) without palp, first article cube shaped, short and with blunt spur. Barbula (fig. 19E) with pair of falcate lateral projections on each side and pair of triangular tubercles medially. Pereon broadest across third and fourth pereomeres (fig. 19A). Dorsolateral bosses only on first pereomeres (fig. 19A). Brood pouch widely open (fig. 19B), with seven pairs of oostegites. Oostegite 1 of left side and right side asymmetrical: oostegite 1 of left side (fig. 19F, G) with broad posterolateral point, of right side (fig. 15H, I) with trianglar posterolateral point. Oostegite 1 with smooth internal ridge; oostegites 2, 3 larger than others, oostegite 7 smallest. Pereopods of similar size and structure (fig. 19J, K). Pleon of five pleomeres, first four narrow with obscure sutures. Fifth pleomeres broad and terminally extended into two small tubercles. Five pairs of uniramous flaplike pleopods, uropods lacking (fig. 19B). DESCRIPTION: Allotype male (CIEHI790 502b): Length 1.50 mm, maximal width (across pereomere 2) 0.45 mm, head width 0.31 mm, head length 0.17 mm, pereon length 0.95 mm (fig. 19L, M). Head elliptical, fused with first pereomere but separated by lateral notch between head and pereon (fig. 19L). Black eyes in lateral corners (fig. 19L). Antennule of two articles, antenna of three articles, terminally nonsetose. Pereomeres distinct, lacking midventral projections (fig. 19M). Pereopods with similar structure, but posteriorly smaller (fig. 19M). Pleon with first three segments distinct, last three segments fused but indicated by lateral indentations and ventral sutures. Pleopods and uropods lacking (fig. 19I). VARIATION: One female from CIEHI790501 is different from the other female specimen in the lot as well as all other material as it has very reduced oostegites. ETYMOLOGY: The specific name tozeumaophila refers to the generic name of the host shrimp. HOST AND LOCALITIES: Infesting Tozeuma lanceolatum Stimpson, 1860 (Hippolytidae), Beibu Gulf, South China Sea, East China Sea, 23– 88 m. REMARKS: The present specimens represent a new genus and species related to Bopyrina and Schizobopyrina. Tozeuma lanceolatum is first recorded here as a host for parasitic isopods. Other species of bopyrids known to parasitize Tozeuma hosts are Parabopyrella thomasi (Nierstrasz and Brender à Brandis, 1929) (infesting T. carolinense Kingsley, 1878, in St. Thomas) and Schizobopy ‐ rina lobata (Bourdon and Bruce, 1983) (infesting Tozeuma sp. in Queensland, Australia).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 page 63, DOI: 10.1206/amnb-921-00-01.1, http://zenodo.org/record/461250
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