Joryma hilsae Rameshkumar, Ravichandran & Trilles, 2011

Ravichandran, S., Vigneshwaran, P. & Rameshkumar, G., 2019, A taxonomic review of the fish parasitic isopod family Cymothoidae Leach, 1818 (Crustacea: Isopoda: Cymothooidea) of India, Zootaxa 4622 (1), pp. 1-99 : 31

Joryma hilsae Rameshkumar, Ravichandran & Trilles, 2011

( Fig. 2 j–l)

Joryma hilsae Rameshkumar, Trilles & Ravichandran, 2011: 88 , fig. 5.— Trilles, Ravichandran & Rameshkumar, 2011: 450.— Sethi, 2012: 153–155, figs 1–3.— Aneesh, Helna & Sudha, 2016a: 1270–1277, fig. 1i–k.— Aneesh, Helna, Trilles & Chandra, 2018b: 18–22, figs 13–17 .

Joryma engralilidis .— Kazmi, Schotte & Yousuf, 2002: 110, fig. 100.

Type and type locality. Holotype, ovig. female (22 mm), held at the French National Museum of Natural History ( MNHN 6289 ), Muttam, Southwestern coasts of India from Sardinella sp.

Material examined. Holotype: ovig. female (22 mm) Muttam, 09 June 2009, from Sardinella sp. coll. G. Rameshkumar ( MNHN 6289 ).

Paratypes: 1 non ovig. female (13 mm), Muttam, 09 June 2009, from Stolephorus commersonnii Lacepède, 1803 , coll. G. Rameshkumar ( CAS / MBRM C- 19). 2 non ovig. females (14, 15 mm), Muttam, 09 June 2009, from Hilsa kelee (Cuvier, 1829) coll. G. Rameshkumar ( CAS / MBRM C- 20) all from southwestern coasts of India.

Non-type: 8 ovig. females (18–22 mm), Mandapam, 18 August 2016, from on Hilsa kelee , coll. P. Vigneshwaran (CAS/MBRM C 240–C 247).

Remark. Rameshkumar et al. (2011) provided a detailed diagnosis and description of the type material. Joryma hilsae has an asymmetrical body twisted to one side (2.1 times as long as greatest width), pereonite 1 produced on each side into slightly bilobed processes reaching the anterior margin of cephalon, posterior margin of pleonite 5 bisinuous. All pereopods are without spines. Pleotelson 1.2 times as wide as long, smoothly rounded with caudomedial lobe, uropods rami equal, mandibular palp with 3 segmented, antenna with 9 articles, maxilliped with 4 recurved spines. Similar to that of other Joryma species, the body twisting of the female is either toward left or right according to their occupation of the branchial cavity respectively.

Colour. Body pale tan with large dark stripes on lateral parts of pereonites 6 and 7 and pleonites 1–5 ( Rameshkumar et al. 2011).

Size. Non ovig. females 13–15 mm; ovig. females 18–22 mm ( Rameshkumar et al. 2011).

Distribution. Known only from the Muttam, Southwestern coasts of India ( Rameshkumar et al. 2011).

Hosts. Known only from the type hosts, Sardinella sp., Hilsa kelee and Stolephorus commersonnii Lacepède, 1803 ( Rameshkumar et al. 2011).

Figures

FIGURE 2. a–c, Cymothoa indica Schiöedte & Meinert, 1884, female (25 mm), (CAS/MBRM C-97); d–f, Cymothoa parupenei Avdeev, 1979, female (25 mm), (ZSI/MBRC D1-533); g–i, Glossobius impressus (Say, 1818) female (26.7 mm) (ZSI/MBRC D1-554); j–l, Joryma hilsae Rameshkumar et al. 2011, female (20 mm), (ZSI/MBRC D1-535); m–o, Joryma sawayah Bowman & Tareen, 1983, female (14 mm), (ZSI/MBRC D1-536); p–r, Lobothorax typus Bleeker, 1857, female (23 mm), (ZSI/MBRC D1-537).

FIGURE 13. a–c, Nerocila sundaica Bleeker, 1857, female (24 mm), (ZSI/MBRC D1-547); d–f, Nerocila trichiura (Miers, 1877), female (30 mm), (ZSI/MBRC D1-548); g–i, Norileca indica (H. Milne Edwards, 1840), female (26 mm), (ZSI/MBRC D1-549); j–l, Norileca triangulata (Richardson, 1910), female (16 mm), (ZSI/MBRC D1-550); m–o, Ryukyua circularis (Pillai, 1954), female (13 mm), (CAS/MBRM C-227); p–r, Ryukyua globosa Williams & Bunkley-Williams, 1994, female (14 mm), (ZSI/MBRC D1-552).

FIGURE 14. Nerocila trichiura (Miers, 1877), female (30 mm), (ZSI/MBRC D1-548). a, dorsal view; b, lateral view; c, mouthpart with antennula and antenna; d, antennula; e, antenna; f, mandible; g, maxilla; h, maxillula; i,maxilliped.

FIGURE 15. Nerocila trichiura (Miers, 1877), female (30 mm), (ZSI/MBRC D1-548). a–f, pereopods 1–4, 6 & 7.

FIGURE 16. Nerocila trichiura (Miers, 1877), female (30 mm), (ZSI/MBRC D1-548). a–d, pleopods 1, 2, 4 & 5; e, uropod.

FIGURE 17. Norileca triangulata (Richardson, 1910), female (16 mm), (ZSI/MBRC D1-550). a, dorsal view; b, antennula; c, antenna; d, mandible; e, maxilla; f, maxillula; g, maxilliped; h, mouthpart with antennula and antenna; i, lateral view.