Anuretes rotundigenitalis   (M. Shahul Hameed,  1976) (Copepod)
Organism information awaits expert curation
Class: Maxillopoda

Image copyrights: Dr. W. Junk h. v. Publishers

Female (dorsal view)

Size: Total length 1.6 mm.

Female: Carapace is equal in length and breadth, antero-lateral sides curved inwards. Frontal plates are well projecting, membranous flange of the frontal plates comparatively narrow. Postero-median lobe of the carapace as broad as the lateral lobes and clearly reaching beyond the latter. Posterior sinuses slightly constricted behind. Median transverse rib is shifted slightly backwards, the cephalic part of the carapace consequently longer than the thoracic. Fourth thoracic segment is broader than long and partly overlapped by the postero-median lobe of the cephalothorax. Genital segment is nearly circular and enlarged, as long as carapace. Abdomen is completely fused with the genital segment, anal laminae originating directly from the genital segment, longer than broad and with five plumose setae. Basel segment of first antenna is carrying a marginal row of twelve long setae and a submarginal ventral row of five short setae. Distal segment short, slender, carrying an apical bunch of about 8 to 9 non-plumose setae. Second antenna is three-segmented, basal segment is short produced into a backwardly directed apically acute process. Second segment is stout, third segment is slender, long and strongly curved distally with a seta nearly in the middle. Post antennal process is an apically blunt, slightly curved claw; its base carrying two bunches of fine hairs. Post oral process is elongate-triangular, claw apically blunt, first maxilla carries one long and two short setae. Basal segment of second maxilla is stout, short, distal segment is slender and long, carrying a winged short inner claw and a long distal outer claw, outer claw is more than twice the length of the inner. Just lateral to the second maxilla is a process with a stout basal part and a slender distal part. Basal segment of maxilliped is fully fused with second, latter is stout and strong, distal segment is strongly curved and pointed at its tip, carrying a spine in the middle, distal inner surface is corrugated. Base of the sternal fork is narrow, rami is short and stout, directed inwards. Basipod of first leg has an upper and lower seta, vestigial endopod is spine-like. Distal segment of exopod carries three claws, a spine-seta and three comparatively small plumose setae. The claws gradually decrease in length, first and second claws are winged on the inner margin, third claw is winged on both sides, and in between the second and third claws is the spine seta. Exopod of second leg is three-segmented, first and second segments of exopod carry a stout claw, the claw on the third segment is very small, first seta on third segment is modified into a winged claw-like process, second seta carries a membranous flange on one side and hairs on the other. Segments of endopod are externally armed with stiff hairs. Apron of third leg is enlarged, rami are placed close together and slightly overlapping, claw of exopod is stout and curved inwards. Fourth leg is three-segmented, first segment is slightly longer than the other two segments combined, with a distal plumose seta, second and third segments are subequal in length, second with one and third with three claws, distal claw is twice as long as the penultimate, all the claws carry pectinate flange. Fifth leg is formed of a short process carrying three plumose setae placed on the ventral side of the posterolateral corners of the genital segment.

Parasitic on the gills of Diagramma crassispinum (fish).

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Kanniyakumari INDIA

Literature Source(s)
  • Hameed, MS (1976) Description of a new species of Anuretes (Copepoda: Caligidae) from Kerala Hydrobiologia Dr. W. Junk h. v. Publishers 51(I) 39-42 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2010-06-29

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