Acartia (Odontacartia) pacifica
Steuer (1915)
Download a fact sheet for Acartia (Odontacartia) pacifica (PDF 529KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Calanoida |
| Family | Acartiidae |
| Genus | Acartia (Odontacartia) |
| Species | pacifica |
Size
- Female: 1.15 - 1.20 mm
- Male: 1.12 mm
Distinguishing characteristics
- Sharp points at end of prosome
- Form of P5
- Arrangement of spines on urosome
Male
- Spines on end of prosome
- Inner edge setae of P5 left exopod long and with distinct hairs
- Urosome somite 1 naked
- Urosome somite 2 with a pair of spines
- Urosome somite 3 with a pair of spines
- Urosome somite 4 with a pair of smaller spines more towards midline
- Anal segment with large hairs
- Caudal rami with outer and inner edged hairs
Female
- Large spines on end of prosome, 2 smaller spines dorsally
- P5 basis short, terminal spine with proximal knob and distal half bordered with hairs
- Posterior border of genital somite with 2 small spines, urosome somite 2 with a pair of larger spines
- Caudal rami with patches of hairs anterior to lateral setae
Distribution
- Epipelagic coastal and brackish waters
- Pacific and Indian Oceans, not Atlantic
Ecology
- Resting eggs in sediments can be viable for up to 20 years
- Exposure to heavy metals and pesticides in sediments can reduce recruitment from sediments to plankton
- Can migrate horizontally to avoid UV-B harm
References
- 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 INstitue of Water and Atmospheric Research, Wellington, New Zealand.
- 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.
- Jiang et al. (2004)
- Jiang et al. (2007)
- Phukham N., 2008. - Species diversity of calanoid copepods in Thai waters, Andaman Sea. M.S. Sc. (Marine Science). Univ. Bangkok. 269 p.. (On line).
- 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., 1965. - The pelagic copepods of the Izu region, Middle Japan. Systematik account XIII. Parapontellidae, Acartiidae and Tortanidae. Publs Seto mar. biol. Lab., 12 (5): 379-408.