Joryma sawayah Bowman & Tareen, 1983

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 : 32

Joryma sawayah Bowman & Tareen, 1983

( Fig. 2 m–o)

Joryma sawayah Bowman & Tareen, 1983: 21–25 , figs 14 a, 16–18 .— Kazmi, Schotte & Yousuf, 2002: 109, fig. 99.— Sethi, 2012: 153–155, fig. 4.—Rameshkumar, Ravichandran, Sivasubramanian & Trilles, 2013a: 42, fig. 1d.—Rameshkumar, Ramesh, Ravichandran & Trilles, 2014c: 940–944, fig. 1d.— Aneesh, Helna & Sudha, 2016: 1270–1277, fig. 1g, h.— Aneesh, Helna, Trilles & Chandra, 2018b: 22–29, figs 18–22 .

Type and type locality. The holotype, held at National Museum of Natural History, Smithsonian Institution ( USNM 189264), from South of Faylaka, Kuwait (Persian Gulf).

Material examined. 13 ovig. females (15–19 mm), Muttam, the southweast coast of India, 29 July 2015, from Stolephorus commersonnii Lacepède, 1803 , coll. G. Rameshkumar & S. Ravichandran ( CAS / MBRM C- 108– C-121); 1 ovig. female (14 mm), Nagapattinam , southeast coast of India, 22 July 2016, from Ilisha melastoma (Bloch & Schneider, 1801) , coll. S. Ravichandran ( ZSI / MBRC D1-536 ) ; 4 non ovig. females (12–16 mm) Vedaranyam , southeast coast of India, 18 September 2016, from Ilisha melastoma , coll. D. Karthick Rajan ( CAS / MBRM C-122 – C-125 ) .

Remark. Joryma sawayah is readily identifiable from the cephalon exposed dorsally and not reaching the margin of pereonite 1 expansion; pereonite 1 anterolateral expansion bilateral and distinctly bilobed; coxae of pereonites 2 and 3 inflated, much larger than remaining coxae; area medial to coxa may be inflated also, resembling dorsolateral bosses; pleonites 1, 2 and 3 overlapped laterally; pleotelson triangular, uropods rami unequal, mandibular palp not segmented; pereopods rather short, bases not expanded; uropods reaching the middle of the lateral margin of pleotelson.

The type species ( J. sawayah ) for the genus was first described by Bowman & Tareen (1983) and was subsequently detailley redescribed by Aneesh et al. (2018b). The Indian specimens are similar with holotype specimen in having a body slightly asymmetrical, twisted to one side, posterior part of cephalon covered by pereonite 1, Pereonite 1 produced into lobe along 1 or both lateral margins of the cephalon. Differences include the Indian specimens having posterolateral margins of pereonites 2–7 inflated particularly at the hunched side of pereon (compared to the straight and smooth margins) and the subtriangular pleotelson posterior margin (compared to the subquadrate pleotelson posterior margin). J. sawayah can be distinguished from J. hilsae by being smaller than the latter, with its body twisted to the side, slightly concave posterior margin of the pleotelson, other characters are discussed under Remarks for J. hilsae to which this species is distinguished.

Colour. Body pale tan in colour.

Size. Ovig. females, 15–19 mm; non ovig. females, 12–16 mm.

Distribution. Recorded from the Persian Gulf, Kuwait ( Bowman & Tareen 1983) and most recently reported from the northern Arabian Sea ( Kazmi et al. 2002). Recent records are from the southeast coast ( Sethi et al. 2012; Rameshkumar et al. 2013, 2014) and southwest coast ( Aneesh et al. 2016) of India.

Host. Mostly known from the family Pristigasteridae : Ilisha melastoma ( Bowman & Tareen 1983; Rameshkumar et al. 2013, 2014; Aneesh et al. 2016), Pellona ditchela Valenciennes, 1847 ( Sethi et al. 2012). As well as Joryma sawayah reported from the family Teraponidae ( Therapon puta ) ( Bowman & Tareen 1983) and Clupeidae ( Sardinella spp.) ( Kazmi et al. 2002).

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 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.

FIGURE 18. Norileca triangulata (Richardson, 1910), female (16 mm), (ZSI/MBRC D1-550). a–f, pereopods 1, 2, 4 & 5–7.

FIGURE 19. Norileca triangulata (Richardson, 1910), female (16 mm), (ZSI/MBRC D1-550). a–e, pleopods 1–5; f, uropod.

FIGURE 20. Ryukyua globosa Williams & Bunkley-Williams, 1994, female (14 mm), (ZSI/MBRC D1-552). a, dorsal view; b, antennula; c, antenna; d, frons; e, lateral view.

FIGURE 21. Ryukyua globosa Williams & Bunkley-Williams, 1994, female (14 mm), (ZSI/MBRC D1-552). a, mandible; b, maxilla; c, maxillula; g, maxilliped; e–h, pereopod 1, 2, 4 & 5.

FIGURE 22. Ryukyua globosa Williams & Bunkley-Williams, 1994, female (14 mm), (ZSI/MBRC D1-552). a, pereopod 6; b, pereopod 7; c–g, pleopods 1–5; h, uropod.