Platycopiidae

Platycopiidae
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Crustacea
Class:	Maxillopoda
Subclass:	Copepoda
Infraclass:	Progymnoplea Lang, 1948
Order:	Platycopioida Fosshagen, 1985
Family:	Platycopiidae G. O. Sars, 1911
Genera
Antrisocopia Fosshagen, 1985 Nanocopia Fosshagen, 1988 Platycopia G. O. Sars, 1911 Sarsicopia Martínez Arbizu, 1997

Platycopiidae is a family of copepods. Until the description of Nanocopia in 1988, it contained the single genus Platycopia.^[1] It now contains four genera, three of which are monotypic; the exception is Platycopia, with 8 species.

Systematics

The family Platycopiidae was erected by Georg Ossian Sars when he described the new species P. perplexa, and included it in the order Calanoida.^[2] In 1948, Karl Georg Herman Lang erected a new suborder, Progymnoplea, for the family, and in 1985, Audun Fosshagen & Thomas Iliffe created the order Platycopioida to contain the Platycopiidae, initially placed alongside Calanoida in the superorder Gymnoplea.^[2] Most recently, Huys & Boxshall inferred that Platycopiidae was the earliest branching copepod lineage, making it the sister taxon to all other copepods; they therefore raised Progymnoplea to the rank of infraclass, to accommodate Platycopioida alone, with all other copepods being placed in the Neocopepoda.^[2]

Members of the Platycopiidae have a primitive form, thought to be similar to the most recent common ancestor of all copepods. Few synapormorphies have been found to unite the family, but they include the presence of a second dorsal seta (hair) on particular segments of the legs.^[3] They share with calanoid copepods the possession of Von Vaupel Klein's organ, a sensory organ near the base of the first swimming leg.^[3]

Members

Antrisocopia prehensilis Fosshagen, 1985 is a critically endangered species from a limestone anchialine cave in Bermuda, known from only five mature specimens.^[4]

Nanocopia minuta Fosshagen, 1988 is a critically endangered species from the same anchialine cave as Antrisocopia, and is known from only two specimens.^[5]

Sarsicopia polaris Martínez Arbizu, 1997 was collected in 1993 from a depth of 534 metres (1,752 ft) in the Barents Sea.^[2]

Platycopia comprises eight species, distributed in the North Sea, the eastern seaboard of North America, the Bahamas, Mauritania and Japan.^[2] The first species to be described was P. perplexa, named by Georg Ossian Sars in 1911.^[2]

References

External identifiers for Platycopiidae
EOL	6972
ITIS	85723
WoRMS	128556
Also found in: Wikispecies

1. ^ Audun Fosshagen & Thomas M. Iliffe (1988). A new genus of Platycopioida (Copepoda) from a marine cave on Bermuda. In G. A. Boxshall & H. K. Schminke. "Biology of Copepods" (PDF). Hydrobiologia 167/168: 357–361. http://www.luciopesce.net/pdf4/platy.pdf. 
2. ^ ^{a b c d e f} Pedro Martínez Arbizu (1997). "Sarsicopia polaris gen. et sp.n., the first Platycopioida (Copepoda: Crustacea) from the Arctic Ocean, and its phylogenetic significance". Hydrobiologia 350 (1–3): 35–47. doi:10.1023/A:1003020829836. 
3. ^ ^{a b} Frank D. Ferrari & Hans-Uwe Dahms (2007). "Post-embryonic development of the Copepoda" (PDF). Crustaceana Monographs 8: 1–226. ISBN 90-04-15713-1. http://si-pddr.si.edu/jspui/bitstream/10088/7269/1/IZ_2007Ferrari_DahmsDevelopmentDraft_61.pdf. 
4. ^ T. M. Iliffe (1996). "Antrisocopia prehensilis". IUCN Red List of Threatened Species. Version 2.3. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/1784. Retrieved May 13, 2011. 
5. ^ T. M. Iliffe (1996). "Nanocopia minuta". IUCN Red List of Threatened Species. Version 2.3. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/14331. Retrieved May 13, 2011.