Cryptobranch dorid nudibranchs

Two cryptobranchs: a pair of Diaulula sandiegensis mating

Cryptobranch dorid nudibranchs, previously known as the taxon Cryptobranchia, are nudibranch sea slugs within the clade Doridacea. These slugs are called "cryptobranch" meaning "hidden gill", because they are able to retract their gills into a gill pocket, in contrast with nudibranchs in the traditional group phanerobranchs or the Phanerobranchia, which taxon is probably paraphyletic, in other words composed of more than one evolutionary lineage.

A. Valdés distinguishes two major clades within the Cryptobranchia: the dorids that have no radula (the Porostomata) and those with a radula (the Labiostomata). The Labiostomata include the monophyletic families Actinocyclidae, Chromodorididae, Dorididae and Discodorididae.

The cryptobranchs include the following genera that are regarded as valid :

• Doris Linnaeus, 1758
• Asteronotus Ehrenberg, 1831
• Atagema J. E. Gray, 1850
• Jorunna Bergh, 1876
• Discodoris Bergh, 1877
• Platydoris Bergh, 1877
• Thordisa Bergh, 1877
• Diaulula Bergh, 1878
• Aldisa Bergh, 1878
• Rostanga Bergh, 1879*
• Aphelodoris Bergh, 1879
• Halgerda Bergh, 1880
• Peltodoris Bergh, 1880
• Hoplodoris Bergh, 1880
• Paradoris Bergh, 1884
• Baptodoris Bergh, 1884
• Geitodoris Bergh, 1891
• Gargamella Bergh, 1894
• Alloiodoris Bergh, 1904
• Sclerodoris Eliot, 1904
• Otinodoris White, 1948
• Taringa Er. Marcus, 1955
• Sebadoris Er. Marcus & Ev. Marcus, 1960
• Conualevia Collier & Farmer, 1964
• Thorybopus Bouchet, 1977
• Goslineria Valdés, 2001
• Pharodoris Valdés, 2001
• Nophodoris Valdés & Gosliner, 2001.

References

• Valdés, A. (2002). "A phylogenetic analysis and systematic revision of the cryptobranch dorids (Mollusca, Nudibranchia, Anthobranchia)". Zoological Journal of the Linnean Society (Blackwell Publishing) 136 (4): 535–536. doi:10.1046/j.1096-3642.2002.00039.x. http://www.ingentaconnect.com/content/bsc/zoj/2002/00000136/00000004/art00001. Retrieved 2010-03-08.