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''Thorunna'' is a
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
sea slug Sea slug is a common name for some Marine biology, marine invertebrates with varying levels of resemblance to terrestrial Slug, slugs. Most creatures known as sea slugs are gastropods, i.e. they are Sea snail, sea snails (marine gastropod moll ...
s, dorid
nudibranch Nudibranchs () are a group of soft-bodied marine gastropod molluscs, belonging to the order Nudibranchia, that shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have b ...
s, shell-less marine
gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...
mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000  extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...
s in the family
Chromodorididae Chromodorididae, or chromodorids, are a taxonomic family of colourful sea slugs; dorid nudibranchs, marine gastropod mollusks in the superfamily Doridoidea. “Chromodorid nudibranchs are among the most gorgeously coloured of all animals.†...
.


Description

The genus ''Thorunna'' contains chromodorid nudibranchs with a distinctive radula, which is very small and has 17-25 teeth in a half-row. The lateral teeth are long slender shafts with bluntly bifid tips. Species in this genus rarely exceed and wriggle or vibrate their gills rhythmically. Anatomically the buccal bulb is very small relative to most chromodorids and the oral tube very long.Rudman W.B. (1984) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: a review of the genera. Zoological Journal of the Linnean Society 81(2/3): 115-273. page(s): 163


Species

Species in the genus ''Thorunna'' include:MolluscaBase (2018)
''Thorunna'' Bergh, 1878.
Accessed on 2018-12-23.
Thorunna africana (6139193367).jpg, '' Thorunna africana'' Thorunna arbuta LW131018.jpg, '' Thorunna arbuta'' Thorunna australis 002.jpg, ''
Thorunna australis ''Thorunna australis'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Chromodorididae.MolluscaBase (2018)''Thorunna australis'' (Risbec, 1928).Accessed on 2018-12-23. Distribution This speci ...
'' Thoruna fertiva (8192101717).jpg, '' Thorunna furtiva'' Thorunna halourga (5910988913).jpg, '' Thorunna halourga'' Thorunna horologia (10.11646-zootaxa.4359.1.1) Figure 13 (cropped).png, ''Thorunna horologia'' Thorunna punicea (10.11646-zootaxa.4359.1.1) Figure 13 (cropped).png, ''Thorunna punicea''
; Species brought into synonymy: * ''Thorunna decussata'' (Risbec, 1928) : synonym of ''Noumea decussata'' Risbec, 1928: synonym of '' Verconia decussata'' (Risbec, 1928) * ''Thorunna lapislazuli'' Bertsch & Ferreira, 1974: synonym of '' Felimare lapislazuli'' (Bertsch & Ferreira, 1974) * ''Thorunna scottjohnsoni'' (Bertsch & Gosliner, 1989): synonym of '' Ardeadoris scottjohnsoni'' Bertsch & Gosliner, 1989 * ''Thorunna speciosus'' Rudman, 1990: synonym of '' Thorunna speciosa'' Rudman, 1990 * ''Thorunna tura'' (Marcus & Marcus, 1967): synonym of ''
Mexichromis tura ''Mexichromis tura'' is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Chromodorididae.MolluscaBase (2018)''Mexichromis tura'' (Marcus & Marcus, 1967).Accessed on 2019-01-22. Distribution This ...
'' (Marcus & Marcus, 1967)


References

{{Taxonbar, from=Q971125 Chromodorididae