Delibus nudus
Delibus nudus (Sewell, 1929)
Download a fact sheet for Delibus nudus (PDF 628KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Calanoida |
| Family | Paracalanidae |
| Genus | Delibus |
| Species | nudus |
Size
- Female: 0.4-0.7 mm
- Male: 0.42-0.52 mm
Distinguishing characteristics
- Very small, less than 1 mm
- Cephalosome and 1st pedigerous somite are fused; somites 4 and 5 also fused
- A1 extends to posterior border of prosome
- Rostrum bifurcate, branches short and wide
- Basis of P1 with inner edge setae
- P2-4, outer edge of exopod segments 2-3 are smooth
- P5 is reduced, only left P5 present, 2 segments in female, 5 in male
- Female urosome 4-segmented, male 5-segmented
Male
- Urosome 5 segmented
- P5 long, almost reaches to end of urosome
Female
- P5 short and ‘dagger’ like
Distribution
- Epipelagic
- Oceanic, widespread in Atlantic, Indian and Pacific Oceans
Ecology
- Nothing appears to be known about the ecology of this species
References
- Bradford-Grieve, J. M. (1994). The marine fauna of New Zealand: Pelagic Copepoda: Megacalanidae, Calanidae, Paracalanidae, Mecynoceridae, Eucalanidae, Spinocalanidae, Clausocalanidae. National Institute of Water and Atmospheric Research, Wellington, New Zealand.
- Corral Estrada, J., (1970) in Thesis Doct., Univ. Madrid, A-129, Sec. Biologicas.
- Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2012. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en.