Farranula gracilis
Dana (1849)
Download a fact sheet for Farranula gracilis (PDF 460KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Cyclopoida |
| Family | Corycaeidae |
| Genus | Farranula |
| Species | gracilis |
Size
- Female: 0.79 – 1.10 mm
- Male: 0.66 – 0.96 mm
Distinguishing characteristics
- Cuticular lenses
- Urosome form
Male
- Very difficult to identify
- Urosome <3 times longer than caudal rami
- Posterior margin of the genital enlargements 2/3 of the way down urosome
- Caudal rami >2 times as long as wide
Female
- 2 plumose or spiny setae at base of A2
- Prosome 2 segmented
- Beak like keel on ventral surface
- No mid dorsal hump on second prosome segment
- P4 with no trace of endopod, 1 naked seta at the base
- Urosome 1 segmented
- Urosome 2 times as long as caudal rami
- In lateral view, anterior section of dorsal margin of genital somite is almost parallel to ventral margin
Distribution
Ecology
References
- 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.
- Farran, G. P. (1911). "Plankton from Christmas Island, Indian Ocean. I. On Copepoda of the Family Corycaeidae." London Proc. Zool. Soc. 1911: (282-296).
- Tanaka, O. (1957). "On copepoda of the family Corycaeidae in Japanese waters." Journal of the Faculty of Agriculture, Kyushu University 11(1): 77-97.