Subeucalanus crassus
Giesbrecht (1888)
Download a fact sheet for Subeucalanus crassus (PDF 815KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Calanoida |
| Family | Subeucalanidae |
| Genus | Subeucalanus |
| Species | crassus |
Size
- Female: 2.46 - 3.70 mm
- Male: 2.40 - 3.10 mm
Distinguishing characteristics
- Female with robust body and short, rounded anterior cephalosome
Male
- Does not have distinct secondary sexual features
- P5 right absent
- P5 left uniramous, 4 segmented with terminal spine
- A1 reaches to end of caudal rami
Female
- Anterior cephalosome rounded and short
- A1 reaches just beyond caudal rami
- A2 endopod segment 1 shorter than endopod segment 2 and about 2times as long as wide
- Basis of mandibular palp with 3 setae, endopod reaches the distal boarder of basis, endopod segment 1 with 2 setae, endopod segment 2 with 4 setae
- Maxilla 1 inner lobe 3 with 4 setae, basis with 5 setae
- Maxilliped endopod segments 1 and 2 with 4 setae each
- Genital somite wider than long and ‘onion’ shaped
- Caudal rami slightly asymmetrical
- Anal somite fused with furca
- Left second caudal rami setae longer than right
Distribution
Ecology
References
- Bradford-Grieve J., (1994). The marine fauna of New Zealand: Pelagic calanoid copopoda: Megacalanidae, Calanidae, Paracalanidae, Mecynoceridae, Eucalanidae, Spinocalanidae, Clausocalanidae. New Zealand Oceanographic Memoir 102.
- Conway DVP, White, R.G., Hugues-Dit-Ciles, J., Gallienne, C.P. and Robins, D.B. (2003). Guide to the coastal and surface zooplankton of the south-western Indian Ocean, Vol Occasional Publications No. 15. Marine Biological Association of the United Kingdom.