Protochondracanthus trilobatus   (Pillai,  1964) (Copepod)
Organism information awaits expert curation
Class: Maxillopoda

Image copyrights: Taylor and Francis

A) Dorsal habitus of adult female; B) Dorsal habitus of adult male

Size: Female 2.86 mm.

Female: Body elongated; head globose, but wider than long. First pediger transformed into a short neck, bearing a pair of small, tripartite processes on ventral surface. Remaining pedigers fused into a long cylindrical trunk, bearing a pair of long, lateral processes in front and another pair of short, posterior processes at end. Genital double somite wider than long, 104 X 142 µm, bearing a long seta in egg sac attachment area. Abdomen wider than long, 54 X 75 µm. Caudal ramus a spiniform process armed with three setae and a small tubercle. Egg sac not seen. Antennule with cylindrical basal portion and a short, offset, distal process; armature being 11 on basal portion and ten on distal process. Antenna two-segmented; first segment small and unarmed, second segment a sharp, recurved hook with a minute, medial tubercle in basal region. Labrum with a small tubercle on lateral margin. Mandible two-segmented; terminal blade with a row of 12 teeth on convex (inner) side. Maxillule tipped with a lobe and two short setae. Maxillule two-segmented; basal segment large but unarmed, distal segment bearing one small, simple seta, one large seta with hyaline tip in basal region and a row of about 25 teeth on terminal process. Maxilliped three-segmented; first segment largest but unarmed, second segment with spinules in terminal and subterminal regions, and third segment drawn out into a pointed process with a subterminal setule. Ventral process in neck region and consisting of a protopod carrying a long, outer seta, an exopod armed with six setae, and an endopod tipped with two setae. Long, lateral process in anterior region of trunk equipped with a subterminal seta and four or five terminal setae.

Male: Body globose, with posterior portion strongly bent forward. Genital somite and abdomen indistinguishably fused. Caudal ramus a short spinulose process. Antennule filiform, armature being 1-1-1-7. Antenna two-segmented; terminal hook short and stubby. Mandible with a row of 13 teeth on convex margin of terminal blade. Maxillule tipped with a blunt knob and 2 setae. Maxilla as in female except for fewer teeth (about ten) on terminal process. Maxilliped constructed as in female only stubbier. No traces of legs.

Parasitic on the gill filaments of Psettodes erumi (fish).

Synonym (s)
Chondracanthus trilobatus Pillai, 1964

Common Name (s)
Economic Importance and Threats



• Kerala INDIA (Record: 29/07/1994, 12/10/1994)

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:2010-07-15

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