Thecacera pennigera

Thecacera pennigera
	The nudibranch Thecacera pennigera, Mar Piccolo of Taranto, Italy
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Order:	Nudibranchia
Suborder:	Doridina
Superfamily:	Polyceroidea
Family:	Polyceridae
Genus:	Thecacera
Species:	T. pennigera
Binomial name
	Thecacera pennigera; (Montagu, 1815)
Synonyms
	Doris pennigera Montagu, 1815; T. lamellata Barnard, 1933; T. maculata Eliot, 1905;

Thecacera pennigera,

mollusc in the family Polyceridae.^[2]

Description

Thecacera pennigera has a short, wide head with two lateral flaps and two sheathed olfactory organs called rhinophores. The body is wedge shaped, being wide at the front and ending in a slender foot with a lateral keel on either side. Halfway along the body are two long, thin, postbranchial processes with white tips. These are club-shaped and glandular and have a defensive function. A group of bipinnate or tripinnate gills lies just above and to the front of these processes. The general colour of the body is translucent white and the upper side is covered with orange splotches and small black spots. The adult length is usually between 15 millimetres (0.6 in) and 30 millimetres (1.2 in).^[3]^[4]

Distribution and habitat

Thecacera pennigera was described from the south coast of England.

Bugula plumosa.^[6] These sometimes foul the hulls of vessels and both the bryozoans and the nudibranch have been extending their ranges, presumably travelling by ship.^[3]^[4]

Biology

Like other sea slugs, Thecacera pennigera is a

eggs are deposited in strings draped across the substrate, usually bryozoans of the genus Bugula, on which the sea slug feeds. It is not clear whether there is a planktonic larval stage or whether juvenile sea slugs hatch direct from the eggs.^[3]

References

^ ^a ^b Montagu G. (1815). Descriptions of several new or rare animals, principally marine, discovered on the South coast of Devonshire. Transactions of the Linnean Society of London 11: 1-26
^ ^a ^b Thecacera pennigera (Montagu, 1815) World Register of Marine Species. Retrieved 2011-12-09.
^ ^a ^b ^c Thecacera pennigera (Winged Thecacera) Smithsonian Marine Station. Retrieved 2011-12-09.
^ ^a ^b Thecacera pennigera Marine Species Identification Portal. Retrieved 2011-12-09.
^ Rudman, W.B., 1997 (December 19) Thecacera pennigera (Montagu, 1815). [In] Sea Slug Forum. Australian Museum, Sydney.
^ Picton, B.E. & Morrow, C.C., 2010. Thecacera pennigera (Montagu, 1813). [In] Encyclopedia of Marine Life of Britain and Ireland.

Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels. 50: pp. 180–213

[montagu-1] Montagu G. (1815). Descriptions of several new or rare animals, principally marine, discovered on the South coast of Devonshire. Transactions of the Linnean Society of London 11: 1-26

[WoRMS-2] Thecacera pennigera (Montagu, 1815) World Register of Marine Species. Retrieved 2011-12-09.

[Smithsonian-3] Thecacera pennigera (Winged Thecacera) Smithsonian Marine Station. Retrieved 2011-12-09.

[MSIP-4] Thecacera pennigera Marine Species Identification Portal. Retrieved 2011-12-09.

[5] Rudman, W.B., 1997 (December 19) Thecacera pennigera (Montagu, 1815). [In] Sea Slug Forum. Australian Museum, Sydney.

[6] Picton, B.E. & Morrow, C.C., 2010. Thecacera pennigera (Montagu, 1813). [In] Encyclopedia of Marine Life of Britain and Ireland.

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