Nerocila arres Bowman and Tareen 1983

Trilles, Jean-Paul, Rameshkumar, Ganapathy & Ravichandran, Samuthirapandian, 2013, Nerocila species (Crustacea, Isopoda, Cymothoidae) from Indian marine fishes, Parasitology Research (1273) 112 (3), pp. 1273-1286 : 1274-1276

Nerocila arres Bowman and Tareen 1983

Synonymy: Nerocila arres Bowman and Tareen 1983: 12–17 , figs 10–12.— Trilles 1994: 82.— Rameshkumar et al. 2012b: not paginated. Nerocila sigani Bowman and Tareen 1983 . Bruce and Harrison-Nelson 1988: 597–598 (part).

Material examined: 17 Nerocila arres , female (14 ovigerous, size from 20 to 28 mm, No. MNHN-IU-2009-1934 and AUCR 473 to 484 ; 3 nonovigerous, size from 17 to 19 mm, No. AUCR 4 85 to 487 ), Nagappatinam, Southeastern coast of India, on Nemipterus japonicus , 08 January 2011 and 01 April 2011 ( Fig. 2a ) .

Description of the ovigerous female ( Figs. 3a–c , 4a–q , and 6a–e ): Body about 2.0 times as long as wide, widest between pereonites 6–7. Cephalon 0.75 as long as wide, rounded anteriorly. Eyes with facets almost indistinct. Antennulae not widely separated at base. Pereonites 6–7 longest and subequal, 1 and 5 subequal in length, shorter than 6–7, 2–4 shortest and subequal. Posterolateral angles of all pereonites produced into points increasing in length from 1 to 7; pereonites 5–7 with broad posteroventral corners. Coxae 2–7 visible in dorsal view, produced into pointed and narrow (2–5) or pointed and broad (6–7) processes; 2–5 not extending beyond posterior of pereonites, 6–7 slightly longer than their respective segment or subequal. All pleonites visible, one longer than 2–5 subequal in length, ventrolateral margins of pleonites 1–2 slightly enlarged, posteriorly directed, extending distinctly beyond pleonite 5, pleonite 3–5 not produced. Pleotelson nearly as wide as long or 1/3 wider than long, lateral margins curving to medial point.

Antennula 8 articled, 1–2 larger than 3–8; article 4–7 with esthetes, article 8 with esthetes and spiny setae.

Antenna with nine articles, 1–2 larger than 3–9, article 4 with two plumose setae, 8–9 with four spiny setae. Mandibular palp article 1 largest, with seven irregular smoothly rounded setae at apex of third article. Maxillula with three terminal spines. Maxilla with two spines on medial lobe and one spine on lateral lobe. Maxilliped with oostegial lobe, distal palp segment with five spines. Pereopods 1–5 without marginal hooked spines, pereopod 6 with one spine on merus, four spines on carpus, and five spines on propodus, pereopod 7 with two rows of three and 5 spines respectively on merus, two rows of three and four spines on carpus and a row of seven spines on propodus. Dactyls of pereopods 1, 2, 4, and 5 with distinct swellings. Pleopods 1–2 with five coupling hooks on protopod medial margin; pleopod 2 with appendix masculina about 0. 5 length of endopod; endopod 1–5 with proximomedial lobe well developed, 1–2 not folded, 3–5 folded; endopod 3–4 with few folds, pleopod 5 endopod with several large folds. Exopod of uropod longer than endopod; endopod not extending, or slightly, beyond posterior margin of pleotelson, with very deep notch on medial margin and serrate lateral margin with a row of 15–16 dissimilar teeth.

Figures

Fig. 2 a–k All the Nerocila species (dorsal view) collected from India in this study: Fig. 2a, N. arres; Fig. 2b, N. depressa; Fig. 2c, N. exocoeti; Fig. 2d, N. longispina; Fig. 2e, N. loveni; Fig. 2f, N. phaiopleura; Fig. 2g, N. poruvae; Fig. 2h, N. serra; Fig. 2i, N. sigani; Fig. 2j, N. sundaica; Fig. 2k, N. trichiura

Fig. 3 a–h N. arres Bowman and Tareen 1983, ovigerous female (MNHN-IU-2009- 1934): a dorsal view; b lateral view; c frons; d uropods. N. sigani Bowman and Tareen 1983, ovigerous female (MNHN-IU-2009-1935): e dorsal view; f lateral view; g frons; h uropods. Scale lines represent 0.5 mm

Fig. 4 a–q N. arres Bowman and Tareen 1983, ovigerous female (MNHN-IU-2009- 1934): a antennule; b antennule, distal articles; c antenna; d antenna, distal articles; e mandible; f mandible palp, apex; g maxillule; h maxilla; I, maxilliped; j–p, pereopods 1–7; q pereopod 7, distal articles

Fig. 6 a–j N. arres Bowman and Tareen 1983, ovigerous female (MNHN-IU-2009- 1934): a–e, pleopods 1–5. N. sigani Bowman and Tareen 1983, ovigerous female (MNHN-IU-2009-1935): f–j pleopods 1–5