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Clausocalanus brevipes

Frost & Fleminger (1968)

Download a fact sheet for Clausocalanus brevipes (PDF 402KB)


Phylum Arthropoda
Subphylum Crustacea
Class Maxillopoda
Subclass Copepoda
Order Calanoida
Family Clausocalanidae
Genus Clausocalanus
Species brevipes


  • Female: 1.24 – 1.62 mm
  • Male: 1.12 – 1.24 mm

Distinguishing characteristics

  • Form of seminal receptacle
  • Shape of forehead and rostrum
  • Prosome : Urosome ratio
  • Female similar to C.parapergens, but distinguished by the length-width ratio of caudal ramus
  • Distinguished from other Clausocalanus males by length of longer left ramus of P5 relative to the urosome
  • Male and female similar to but larger & more robust than C.pergens


  • Rostrum in lateral view knob-like and protruding ventrally
  • Longer ramus of P5 & genital pore on left side, left P5 much shorter than urosome


  • Rostrum in lateral view slender or thick and curved ventroposteriad
  • Posterior margin of prosome angular in lateral view
  • Prosome:urosome ratio 2.69-3.09:1
  • P5 segment 3 more than 2x longer than P5 segment 1
  • Caudal rami more than 1.61-1.83 times long as wide
  • Genital somite more than 1.5 times as long as urosome somite 3
  • Dorsal & ventral lobes of seminal receptacle conspicuous in ventral view


Subantarctic, circumglobal



  • Bradford-Grieve, J. M., E. L. Markhaseva, et al. (1999). Copepoda. South Atlantic Zooplankton. D. Boltovskoy. Leiden, The Netherlands, Backhuys Publishers. 1: 869-1098.
  • Frost B, Fleminger A (1968) A revision of the genus Clausocalanus (Copepoda: Calanoida) with remarks on distributional patterns in diagnostic characters. Bulletin of Scripps Institution of Oceanography 12:1-235.