Chondracanthid copepods parasitic on flatfishes of Kerala, India Author Ju-Shey text Journal of Natural History 2000 2000-05-30 34 5 709 735 http://dx.doi.org/10.1080/002229300299372 journal article 10.1080/002229300299372 1464-5262 Bactrochondri a hoi ( Pillai, 1985 ) (®gures 5±6) Material examined. Nine adult mm (seven with attached l) found on gill ®laments of Cynoglossus lida (Bleeker) : one collected on 11 March 1994 and eight on 20 July 1994 . FIG. 5. Bactrochondria hoi (Pillai) . Female: (A) habitus of adult, dorsal; (B) head and neck, dorsal; (C) same, lateral; (D) genito±abdomen, ventral; (E) caudal ramus; (F) antennule; (G) antenna; (H) labrum; (I) mandible; (J) maxillule; (K) maxilla; (L) maxilliped. Scale bars: 0.5 mm in (A); 0.1 mm in (B±D); 0.02 mm in (E, F, H, K, L); 0.05 mm in (G); 0.01 mm in (I, J). FIG. 6. Bactrochondria hoi (Pillai) . Female: (A) leg 1; (B) leg 2. Male: (C) habitus of adult, lateral; (D) genito±abdomen, ventral; (E) antennule; (F) antenna; (G) mandible; (H) maxillule; (I) maxilla; (J) maxilliped. Scale bars: 0.05 mm in (A); 0.02 mm in (B, D); 0.1 mm in (C); 0.01 mm in (E±J). Female. Body (®gure 5A) elongated and cylindrical, measuring 2.26±3.02 mm long. Head (®gure 5B) longer than wide, 495Ö 385 m m (not including ināted antennule), with small rounded knob at each anterolateral corner and distinctly swollen oral region (®gure 5C). First pediger forming neck region (®gure 5C). Second pediger fused with remaining prosomal somites into a long, cylindrical trunk. Genital double somite (®gure 5D) distinctly wider than long, with abdomen attaching to it like a narrow ring. Caudal ramus (®gure 5E) a spiniform pointed process bearing three setae and a tubercle. Egg sac not seen. Antennule (®gure 5F) ¯eshy, with ināted base tipped with a short, setae-bearing process; armature being (from proximal to distal) 1-1-1-2-2-8. Antenna (®gure 5G) two-segmented; terminal segment sharply curved (broken in dissected specimens), with annular sculptures in bent area. Labrum (®gure 5H) with posterolateral knob and smooth posterior margin. Terminal blade of mandible (®gure 5I) bearing 22 to 24 teeth on convex (inner) side and 13 to 16 teeth on concave (outer) side. Maxillule (®gure 5J) with two terminal elements and a subterminal process tipped with three tubercles. Maxilla (®gure 5K) two-segmented; ®rst segment robust and unarmed; second segment bearing one small, simple seta, one large seta with hyaline tip and a row of 14 to 18 teeth on terminal process. Maxilliped (®gure 5L) three-segmented; constructed roughly as in B. papilla with subchelate appearance. Leg 1 (®gure 6A) and leg 2 (®gure 6B) as in B. papilla . Male. Body (®gure 6C) 151 m m long, with swollen cephalosome and cylindrical metasome and urosome. Genital somite (®gure 6D) with usual ventrolateral ridges. Abdomen (®gure 6D) indistinguishably fused with genital somite. Caudal ramus (®gure 6D) a naked spiniform process. Antennule (®gure 6E) short and stubby, armature being 1-1-1-2-1-7. Antenna (®gure 7F) two-segmented and without armature. Mandible (®gure 6G) with fewer teeth on terminal blade, 11 on convex side and ten on concave side. Maxillule (®gure 6H) tipped with three elements. Maxilla (®gure 6I) with 12 to 14 teeth on terminal process. Maxilliped (®gure 6J) two-segmented, lacking terminal claw. Legs 1 and 2 missing. Remarks. In addition to the three diOEerences enumerated in the Remarks to B. papilla , the two species can be distinguished further by having in the present species more teeth (16±18 vs. eight or nine) on the terminal process of the female maxilla and in lacking legs entirely in the male.