122 research outputs found
Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific
No full textAn, Jianmei, Chen, Ruru, Paulay, Gustav (2020): Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific. Zootaxa 4845 (2): 264-274, DOI: 10.11646/zootaxa.4845.2.
Loki Markham 1972
No full textGenus Loki Markham, 1972 Type species: Loki circumsaltanus Markham, 1972, by original designationPublished as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on page 268, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
Allodiplophryxus Markham 1985
No full textGenus Allodiplophryxus Markham, 1985 Type species: Allodiplophryxus floridanus Markham, 1985 by original designationPublished as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on page 266, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
Hemiarthrus Giard & Bonnier 1887
No full textGenus Hemiarthrus Giard & Bonnier, 1887 Type species: Hemiarthrus abdominalis (Krøyer, 1840) by monotypyPublished as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on page 270, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
FIGURE 4 in Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific
No full textFIGURE 4. Alpheus crinitus (species complex) (UF 15684), with type of Hemiarthrus alphei n. sp. (UF 15685) attached; image of live specimens; host and parasite (A, B), parasite (C, D).Published as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on page 271, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
FIGURE 3. Loki athanus n in Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific
No full textFIGURE 3. Loki athanus n.sp., holotype female (UF18690) (A–F), paratype male (UF18690) (G–K): A, dorsal view (lp = lateral plates; ur = uropods; pl = pleopod; pe1 = pereopod 1; pe2 = pereopod 2; pe3 = pereopod 3; eg = eggs); B, right antennula and antennae; C, right part of barbula; D, right maxilliped, external view; E, left oostegite 1, internal view; F, right pereopod 2; G, dorsal view; H, ventral view; I, right antennula and antenna; J, left pereopod 1; K, left pereopod 7. Scale bar: A = 1 mm; B, D–F = 0.63 mm; C, G, H= 0.44 mm; I–K=0.13 mm.Published as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on page 269, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
Loki athanus An & Chen & Paulay 2020, n. sp.
No full textLoki athanus n. sp. Figs 2, 3 Material examined. Holotype female, ovigerous, 1.06 mm, paratype male, 0.5 mm, UF Arthropoda 18690, Madagascar, Nosy Be, across bay from CNRO complex, off Lokobe Reserve, 1–3 meters, 13.4139°S, 48.3056°E, coll. G. Bakary, H. Bruggemann, F. Michonneau, G. Paulay, and T. Werner, 16 May 2008. Infesting Athanas parvus de Man 1910 (UF Arthropoda 14367) (Fig. 2). Description. Holotype female (UF 18690) length 1.06 mm, head length 0.29 mm, head width 0.35 mm, pleonal length 0.40 mm (Fig. 3A). Head subquadrate, white, with black eyes near anterior margin. Antennulae with two articles, antennae with three articles, without setae (Fig. 3B). Barbula with one falcate lateral projection on each side (Fig. 3C). Maxilliped without palp, and with short, blunt plectron (Fig. 3D). Pereon yellow. First three pereomeres merged into ring encircling the head. Other pereomeres distinct on short side of the body but fused on long side (Fig. 3A). Brood pouch pigmented, swollen, full of eggs, covering entire ventral surface of head and pereon. First oostegite with unadorned internal ridge, with broad notch along posterior margin (Fig. 3E). All pereopods of similar size and shape (Fig. 3F), with stout ischia and short, blunt dactyli. First two pairs of pereopods clustered near head; other five on short side in line along pereon, while on long side pereopod 3 is near middle of brood pouch, 4, 5 near posterolateral border of brood pouch, and 6, 7 near posterior end of brood pouch. Pleon of five pleomeres (Fig. 3A), first four produced into uniramous lateral plates, with uniramous pleopods, fifth without lateral plates, with divergent pair of uniramous uropods. Paratype male (UF 18690) length 0.5 mm, maximum width (across pereomere 1) 0.19 mm, head length 0.09 mm, head width 0.15 mm, pleonal length 0.12 mm (Fig. 3G, H). Head semicircular, with large black eyes near posterolateral margin (Fig. 3G). Antennae visible from dorsal view, antennulae and antennae with 3 and 5 articles respectively, terminal articles setose (Fig. 3I). Pereon with first segment fused with head, two to seven distinct laterally, but slightly fused near midline (Fig. 3G); with curved margins; first segment widest. Pair of pigmented lines extending from third to seventh pereomere (Fig. 3G). All pereopods with short dactyli; first two pereopods slightly larger than others, but similar in structure (Fig. 3J, K). Pleon fused into triangular piece, narrower than last pereomere (Fig. 3G, H). Pleopods and uropods absent. Etymology. The specific name, athanus, refers to the host genus. Remarks. The present specimens are placed in the previously monotypic genus Loki because the female has 7 pairs of pereopods which on the long side have the following position: first two clustered around the head, third near middle of brood pouch, last four clustered around posterior of brood pouch. It further matches Loki because the fifth pleomere lacks lateral plates and has divergent uropods. The male fits Loki because it has a triangular pleon and the head is completely fused with the first pereomere. The new species differs from L. circumsaltanus Markham, 1972 in the following characters (character states in L. circumsaltanus given in parentheses): female with well-developed lateral plates on pleomere 4 (pleomere 4 with reduced lateral plates on short side, without lateral plates on long side) and with four pairs of uniramous pleopods (three pairs of uniramous pleopods); male with large black eyes (lacking eyes), and with pleon distinctly separated from pereomere 7 (pleon medially fused with pereomere 7). The new species extends the range of Loki from the west Atlantic to the Indo-West Pacific.Published as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on pages 268-269, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
Allodiplophryxus unilateralis An & Chen & Paulay 2020, n. sp.
No full textAllodiplophryxus unilateralis n. sp. Fig. 1 Material examined. Holotype female, ovigerous, 1.53 mm (maximum length, from anterior end of head to uropods), paratype male, 0.94 mm, WAM C75202 & C75203 (ex UF Arthropoda 23161), Australia, Western Australia, Ningaloo Reef, S shallow bommies, back reef, patchy corals on sand, in rubble 2–3 meters snorkel, by hand, 22.7415°S, 113.6836°E, coll., Robert Lasley, 15 May 2009. Infesting Jocaste lucina (Nobili, 1901) WAM C 75204 (ex UF Arthropoda 21490). Description. Holotype female (WAM C75202) length 1.53 mm, pleonal length 0.67 mm. Body outline oval, sinistrally distorted (Fig. 1A, B). Head subovate, embedded in pereon, not visible in dorsal view, covered by oostegite 2. Eyes not discernible (Fig. 1A). Antennulae with two articles; antennae absent (Fig. 1C). Right maxilliped articulated, anterior article triangular, much large than posterior one, without palp, plectron short and blunt, (Fig. 1D). Anterior apex of left maxilliped rolled inward (Fig. 1E). Barbula (Fig. 1F) with 12 irregular marginal projections, as well as two pairs of short, blunt projections on raised layer. Pereon with segments distinct on concave side only (Fig. 1A). Pereomere 2 ventrally produced into several irregular fleshy projections (Fig. 1B). First oostegite of two sides different, left (Fig. 1G) much wider than right (Fig. 1H, I); right with long, slender posterior part and internal ridge with two tubercles (Fig. 1H, I); left with broad posterior part and internal ridge nearly entire (Fig. 1H). Five pereopods discernible on short side, anterior two well developed, while posterior three small and clustered together. Three pereopods present on long side, first two well developed (Fig. 1J), third represented only by scar-like basis. Pleon of six pleomeres, first four bearing biramous lateral plates (Fig. 1A), fifth with uniramous lateral plates, pleotelson small and globose, embedded into fifth pleomere (Fig. 1K). Biramous pleopods present on first four pleomeres only, restricted to short side (Fig. 1B). Paratype male (UF 23161) length 0.94 mm, maximum width (across pereomere 4) 0.39 mm, head length 0.18 mm, head width 0.25 mm, pleonal length 0.18 mm. Black pigmentation on dorsal surface of first pereomere and head. Head oblong; black eyes near lateral margin (Fig. 1L). Antennulae and antennae each with 3 articles (Fig. 1M, N). Pereon segments distinct (Fig. 1L), with truncate margins and lacking midventral projections (Fig. 1M). First three pereopods with large dactyli, decreasing in size posteriorly, last four pereopods with smaller dactyli; all dactyli sharp and pointed (Fig. 1O, P). Carpi and meri of first pereopods larger than those of others (Fig. 1M, O, P). Pleon fused into single piece, but with obscure indentation demarcating first pleomere; narrower than the last pereomere (Fig. 1M); with scattered black pigmentation on ventral surface. Pleopods and uropods absent. Etymology. The specific name, unilateralis, refers to the restriction of pleopods to the short side of the body in the female. Remarks. Species in four genera within the Hemiarthrinae have biramous lateral plates on the pleon: Allodiplophryxus, Diplophryxus, Micropodiphryxus, and Cataphryxus. The present specimens are placed in Allodiplophryxus because the female has biramous lateral plates and two prominent pereopods on the long side but five on the short side, and because the male has a fused pleon. The new species differs from the only congener, A. floridanus Markham, 1985, in the following characters of the female (character states in A. floridanus given in parentheses): 1) pleon with six segments (five segments); 2) first oostegite asymmetrical (symmetrical); 3) pleopods restricted to short side (pleopods on both sides). The new species extends the range of Allodiplophryxus from the West Atlantic to the Indo-West Pacific.Published as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on pages 266-267, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
Hemiarthrus alphei An & Chen & Paulay 2020, n. sp.
No full textHemiarthrus alphei n. sp. Figs 4, 5 Material examined. Holotype female, ovigerous, 1.97 mm, paratype male, 1.06 mm, UF Arthropoda 15685 (Fig. 4C, D), French Polynesia, Society Island, Moorea, N end of Temae, near lighthouse, outer reef slope, 29 meters, from within rubble, 17.479°S, 149.7643°W, coll. J. Poupin, 17 October, 2008. Infesting ovigerous Alpheus crinitus Dana, 1852 (species complex) UF Arthropoda 15684 (Fig. 4A, B). Description. Holotype female (UF 15685) length 1.97 mm; head length 0.57 mm; head width 0.8 mm; pleon length 0.86 mm. Body extremely asymmetrical, 45°dextral distortion; no pigmentation (Fig. 5A). Head oval, anterior margin deeply bilobate anteriorly, posterior margin rounded (Fig. 5A). Eyes absent. Both antennulae and antennae rudimentary, with one article, without setae (Fig. 5C). Barbula (Fig. 5D) with three slender falcate pointed lateral projections on each side. Maxilliped (Fig. 5E) with two segments, anterior segment subtriangular and much larger than irregularly-shaped posterior one, without palp, plectron slender. Pereon broadest across seventh pereomere (Fig. 5A). Pereomeres 3–7 separated along middle region but fused along both sides. Coxal plates absent. Brood pouch enclosed by oostegites, open medially (Fig. 5B). First oostegites highly asymmetrical; left one (Fig. 5F, G) with two subequal articles, internal ridge entire, with blunt posterolateral point; right one (Fig. 5H, I) with anterior article approximately three times longer than posterior article, internal ridge entire, with sharp posterolateral point. Seven pereopods on right side of pereon, but only first pereopod discernible on left side. Pereopod with stout basis, small meri and carpi, short but pointed dactyli (Fig. 5J). Pleon of five pleomeres, extending away from pereomere 7 in dorsal view (Fig. 5A). First four pleomeres with uniramous, symmetrical lateral plates and four pairs of similar, uniramous pleopods. Terminal pleomere extending to form rounded pleotelson, terminating in sharp point (Fig. 5B). Paratype male (UF 15685) length 1.06 mm; maximum width (across pereomere 5) 0.39 mm; head length 0.15 mm; head width 0.20 mm, pleon length 0.31 mm. All pereomere regions distinct; pleon fused (Fig. 5K, L). Head elliptical, with rounded anterior margin, posterior margin fused with first pereomere; irregular dark eyes near posterolateral corners (Fig. 5K). Antennulae and antennae with three and five articles respectively, terminally setose; antennae prominently extending beyond head, visible in dorsal view. (Fig. 5L, M). Pereon with seven segments (Fig. 5K). Pereomeres 3–5 subequal in width, lacking midventral projections, with patches of pigmentation on pereomeres 4–5 (Fig. 5K). Pereopods subequal, except last pair slightly larger than others (Fig. 5L, N, O). Pleon fused into single piece (Fig. 5L), inflated, with scattered black pigmentation on dorsal surface. Pleopods and uropods absent. Etymology. The specific name, alphei, refers to the host genus, Alpheus. Remarks. This new species is placed in Hemiarthrus because the female has 5 pleomeres, four pairs of uniramous lateral plates and uniramous pleopods, and only one pereopod on the long side. It can be distinguished from the other species of Hemiarthrus by the barbula of the female having three pairs of falcate pointed lateral projections, pleomeres having well-developed, symmetrical lateral plates, and the pleon ending in a sharp point. The present species is most similar to H. synalphei, but it can be distinguished from H. synalphei (character states in H. synalphei given in parentheses) because the barbula of the female has three pairs of lateral projections (only two pairs); the pleotelson is short and oval (long and cylindrical); and the head of the male is fused with pereomere 1 (head separated from pereomere 1); it lacks sucker discs on the oostegite (with sucker discs on the oostegite). Hemiarthrus surculus, H. synalphei and H. alphei infest alpheid shrimp, H. abdominalis infests pandalid and hippolytid shrimp, while H. nematocarcini is parasitic on nematocarcinid shrimp. Chopra (1923) thought Palaemon specimens parasitized by bopyrids are difficult to identify owing to the fact that the parasite inhibits sexual activity and prevents the full manifestation of secondary sexual characters, and females never carry eggs. Rajkumar et al., (2011) found that infestation with Epipenaeon ingens had a significant effect on reproduction in Metapenaeopsis stridulans. But the host of H. alphei was ovigerous, suggesting that hosts can remain reproductive after bopyrid infestation.Published as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on pages 270-272, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/440660
Oil and gas in the exclusive economic zone
No full textThis article summarises some of the key points in a paper prepared by the author for the New Zealand Law Society: Exploration and Development within the EEZ – offshore oil and gas (NZLS CLE Ltd, March 2014)
- …
