Bactrochondria papilla   Ho, Kim & Kumar,  2000 (Copepod)
Organism information awaits expert curation
Class: Maxillopoda

Image copyrights: Taylor and Francis

Dorsal habitus of female (adult)

Size: Female 2.52-4.56 µm long and 0.37-0.52 µm wide; male 388 µm long.

Female: Body greatly elongated and cylindrical. Head longer than wide, 0.60 X 0.37mm (not including inflated antennule), with prominent cephalic process (a swollen base tipped with a nipple-like protrusion) at each anterolateral corner. Neck region formed by first pediger, remaining prosomal somites fused into a long, cylindrical trunk. Genital double somite indistinguishably fused to trunk, carrying a central vermiform process on ventral side. Abdomen like a narrow ring attached to genital double somite. Caudal ramus a pointed spiniform process carrying three setae and one tubercle. Longest egg sac 8.64 mm long, nearly twice as long as its body length. Antennule with inflated base and cylindrical tip; armature being (from proximal to distal ) 1-1-2-1-7. Antenna two-segmented; terminal segment an uncinate hook. Labrum with smooth posterior margin. Mandible two-segmented; terminal blade with 21 to 27 teeth on convex (inner) side and 12 to 16 teeth on convex (outer) side. Maxillule with three blunt, terminal setae. Maxilla two-segmented; first segment robust but unarmed; second segment bearing one small, simple, basal seta, one large seta with hyaline tip and a row of seven to nine teeth along inner edge of terminal process. Maxilliped three-segmented; first segment largest but unarmed, second segment expanded distally with enlarged inner corner armed with two patches of denticles, and terminal segment reduced to a small claw attached to non-swollen outer distal corner of second segment. Leg 1 with greatly enlarged, process-like protopod carrying an outer basal seta and much reduced knob-like rami. Endopod unarmed, but exopod tipped with five short setae, four terminal and one subterminal. Leg 2 biramous; protopod largely fused to trunk and only identifiable by its outer, basal seta. Both rami rod-like, with exopod larger than endopod and tipped with four short setae, three terminal and one subterminal.

Male: Body cephalosome moderately swollen. Genital somite with prominent ventro-lateral ridges but abdomen small and indistinct. Caudal ramus a spiniform process bearing a medial seta and a ventral tubercle at base. Antennule elongate and cylindrical, with terminal portion set off in a posteroventrally directed knob; armature being 1-1-1-2-8. Antenna a strongly recurved hook bearing an inner setule. Mandible with fewer teeth on terminal blade, 14 on convex side and seven to eight or concave side. Paragnath a spinulose lobe. Maxillule with two terminal elements. Maxilla with seven teeth on inner surface of terminal process. Maxilliped with much reduced, terminal claw visible in lateral view only. Leg 1 reduced to a seta and a tiny knob tipped with two setules and a small tubercle, or only two setules.

Parasitic on Cynoglossus dubius (fish).

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Kerala INDIA (Record: 14/02/1994, 20/07/1994)

Literature Source(s)
  • Ho, JS; Kim, IH and Kumar, AB (2000) Chondracanthid copepods parasitic on flatfishes of Kerala, India Journal Of Natural History Taylor and Francis 34(5) 709-735 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2010-06-30

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