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Clausocalanus laticeps

Farran (1929)

Download a fact sheet for Clausocalanus laticeps (PDF 347KB)


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


  • Female: 1.25 - 1.67mm
  • Male: 1.01 - 1.10mm

Distinguishing characteristics

  • Form of seminal receptacle, ventral lobe large, dorsal lobe slender and finger like
  • Prosome : Urosome ratio
  • Large vaulted ewhale-likef head


  • Rostrum in lateral view knob like and protruding ventrally
  • P5 longer and genital pore on left
  • P5 left longer than urosome
  • Right P5 3 segmented
  • Caudal rami more than 1.60 times as long as wide


  • Large vaulted ewhale-likef head in lateral view, rounded in dorsal view
  • Rostrum in lateral view short, usually straight, directed ventroposteriad
  • Terminal points of P5 segment 3 not spinulate
  • Prosome:urosome ratio 2.51-2.97:1
  • Ventral view of genital somite non protruberant
  • Genital somite greater than 1.5 times as long as somite 3
  • Ventral lobe of seminal receptacle large in lateral view, seminal receptacle dorsal lobe slender, finger like and directed dorsally or ventrodorsally
  • Dorsal and ventral lobes visible in ventral view


  • Antarctic-subantarctic



  • 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
  • Guglielmo and Ianora (1996)