Candacia truncata
Dana (1849)
Download a fact sheet for Candacia truncata (PDF 777KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Calanoida |
| Family | Candaciidae |
| Genus | Candacia |
| Species | truncata |
Size
- Female: 1.84 - 2.10 mm
- Male: 1.87 - 2.11 mm
Distinguishing characteristics
- Genital somite and P5 form
Male
- Geniculate right A1 has a series of stout proximal segments followed by a thin section, then a broad club section, beyond club section, segment 16 has a finger-like protrusion which is difficult to observe clearly; fused segments 17 and 18 are characteristically curved
- Last prosome somite symmetrical with sharp points
- P5 left segment 4 with 3 setae; right P5 not chelate and segment 3 terminates in long plumose setae
- Urosome and caudal rami symmetrical with no projections
Female
- A1 23 segmented, proximal 8 segments thickened
- A characteristic square end to the last prosome somite when viewed laterally
- Corners of prosome are pointed & directed forwards, so points not visible in dorsal view
- P5 segment 3 with terminal finger-like processes finely serrated distally; inner margin setae subequal, distal most seta slightly longer than proximal seta
- Urosome quite symmetrical with no protuberances
- Anal somite short and often fused with caudal rami
Distribution
- Epipelagic; open ocean
- Tropical and subtropical
- Pacific and Indian Oceans; probably not Atlantic
Ecology
- Specialised predator, grasping prey with large and robust maxillae
- Larvaceans are major prey item
References
- Boxshall, G. A. and S. H. Halsey (2004). "An introduction to copepod diversity." Ray Society Publications 166: i-xv, 1-966.
- Bradford-Grieve, J. M., (1999) The marine fauna of New Zealand: pelagic calanoid copepoda: Bathypontiidae, Arietellidae, Augaptilidae, Heterorhabdidae, Lucicutiidae, Metridinidae, Phyllopodidae, Centropagidae, Pseudodiaptomidae, Temoridae, Candaciidae, Pontellidae, Sulcanidae, Acartiidae, Tortanidae. National Institute of Water and Atmospheric Research, Wellington, New Zealand.
- Chen Q. C. & Zhang S. Z, 1965. The planktonic copepods of the Yellow Sea and the East China Sea. I. Calanoida. Studia mar. sin., 7: 20-131. (Chinese with English summary).
- 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.
- Greenwood, J. G. (1978). "Calanoid copepods of Moreton Bay (Queensland) 3. Families Temoridae to Tortanidae, excluding Pontellidae." Proceedings of the Royal Society of Queensland 89: 1-21.
- Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2009. Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en
- Tanaka O., 1935. The Copepoda of Sagami Bay. Part II. The family Candaciidae. Suisan Gakkai Ho, 6 (4): 210-227. (Japanese).