Dioithona rigida
Giesbrecht (1896)
Download a fact sheet for Dioithona rigida (PDF 381KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Cyclopoida |
| Family | Oithonidae |
| Genus | Dioithona |
| Species | rigida |
Size
- Female: 0.78-0.83 mm
Distinguishing characteristics
- Very robust with blunt, rounded cephalosome
- Anterior third of genital somite swollen laterally, smooth round swelling in dorsal view
Male
- Very difficult to identify
Female
- Very robust with blunt, rounded cephalosome
- Body rigid, with thick cuticle
- Prosome stumpy, short oval in dorsal view, greatest width at posterior end of cephalosome
- Cephalosome broadly truncate in dorsal view, laterally bent ventrally into blunt rostrum, nearly pointed anteroventrally
- A1 0.8 times prosome length
- Pr length 1.7 times width
- Pr:Ur 1.2
- Anterior third of genital somite swollen laterally, smooth round swelling in dorsal view
Distribution
Ecology
References
- Nishida, S. (1985). "Taxonomy and distribution of the family Oithonidae (Copepoda, Cyclopoida) in the Pacific and Indian oceans." Bulletin of the Ocean Research Institute, University of Tokyo. Tokyo. no. 20: 1-167.
- Mckinnon pers.comm.