Clausocalanus farrani   Sewell,  1929 (Copepod)
Organism information awaits expert curation
Class: Maxillopoda

Image copyrights: Biotech Books

a. The whole animal from the left side

Size (female): length 0.87-1.08 mm

The proportional lengths of the cephalothorax and abdomen are as 16 to 7, so that the abdomen is contained 2.29 times in the length of the anterior region of the body.
The forehead presents a uniform rounded appearance, when viewed from the side; it terminates below in a pair of rostral spines that are directed vertically downwards and above passes straight back into the line of the dorsal margin. The head and 1st thoracic segment are fused and so also are the 4th and 5th thoracic segments. The posterior thoracic margin is slightly produced at the upper angle but below this forms a uniformly rounded curve.
The abdomen consists of four segments . The furcal rami are one-third longer than the anal segment; they are also slightly longer than broad.
The genital aperture on the ventral aspect of the 1st abdominal segment is swollen and does not reach as far back as the posterior margin of the segment.
The 1st antenna reaches back to the posterior margin of the thorax. It consists of twenty-three separate joints; segments 8 and 9 and 24 and 25, respectively, being fused. 4th pair of swimming legs are more slender. For the 5th pair of legs, in the bifid end of the terminal segments the two points diverge.

Synonym (s)

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic


• INDIA (Record: 1910-1925)
• Andaman and Nicobar Islands, Barren Island INDIA (Record: 04/2006)

Literature Source(s)
  • Sewell, RBS (1999) The copepoda of Indian seas Biotech Books, Delhi, India 407 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Pillai, HUK; Jayaraj, KA; Rafeeq, M; Jayalakshmi, KJ and Revichandran, C Mesozooplankton distribution near an active volcanic island in the Andaman Sea (Barren Island) Environmental Monitoring and Assessment Springer Available at -

Page last updated on:2010-12-28

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