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Thecacera sp.jpg
A live individual of Rudman's Thecacera species 2, head end towards the left
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia

clade Euthyneura
clade Nudipleura
clade Nudibranchia
clade Euctenidiacea
clade Doridacea

Superfamily: Polyceroidea
Family: Polyceridae
Subfamily: Polycerinae
Genus: Thecacera
Fleming, 1828[1]
Type species
Thecacera pennigera (Montagu, 1815)

Thecacera is a genus of sea slugs, specifically nudibranchs, shell-less marine gastropod mollusks in the family Polyceridae.


Species in the genus Thecacera include:[2]


  1. ^ Fleming (1828) Hist. Brit. Anim.: 283.
  2. ^ Bouchet, P.; Gofas, S. (2014). Thecacera Fleming, 1828. Accessed through: World Register of Marine Species at on 2014-11-20
  3. ^ Alder J. & Hancock A. (October 1851). "Descriptions of two new species of nudibranchiate Mollusca, one of them forming the type of a new genus". Annals and Magazine of Natural History (series 2)8(46): 290-302, pls. 9-10.
  4. ^ Rudman, W.B., 2002 (July 29) Thecacera sp. 2 [In] Sea Slug Forum. Australian Museum, Sydney.

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