Joryma sawayah Bowman & Tareen 1983
Creators: name: Ravichandran, S.
name: Vigneshwaran, P.
name: Rameshkumar, G.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Cymothoidae
Joryma
Joryma sawayah

description: 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).
description: Published as part of Ravichandran, S., Vigneshwaran, P. & Rameshkumar, G., 2019, A taxonomic review of the fish parasitic isopod family Cymothoidae Leach, 1818 (Crustacea: Isopoda: Cymothooidea) of India, pp. 1-99 in Zootaxa 4622 (1) on page 32, DOI: 10.11646/zootaxa.4622.1.1, http://zenodo.org/record/3379899