Clausocalanus brevipes
Frost & Fleminger (1968)
Download a fact sheet for Clausocalanus brevipes (PDF 402KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Calanoida |
| Family | Clausocalanidae |
| Genus | Clausocalanus |
| Species | brevipes |
Size
- 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
Male
- Rostrum in lateral view knob-like and protruding ventrally
- Longer ramus of P5 & genital pore on left side, left P5 much shorter than urosome
Female
- 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
Distribution
Subantarctic, circumglobal
Ecology
References
- 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.