Thorunna is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod mollusks in the subfamily Miamirinae of the family Chromodorididae.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): 216Johnson R.F. & Gosliner T.M. (2012) Traditional taxonomic groupings mask evolutionary history: A molecular phylogeny and new classification of the chromodorid nudibranchs. PLoS ONE 7(4): e33479.Rudman W. B. (1990). "The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: further species of Glossodoris, Thorunna and the Chromodoris aureomarginata colour group". Zoological Journal of the Linnean Society 100(3): 263-326. .
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 includeMolluscaBase (2020). Thorunna Bergh, 1878. Accessed on 2026-04-22.:
Species brought into synonymy Thorunna decussata Risbec, 1928: synonym of Verconia decussata Thorunna lapislazuli Bertsch & Ferreira, 1974: synonym of Felimare lapislazuli Thorunna scottjohnsoni Bertsch & Gosliner, 1989: synonym of Ardeadoris scottjohnsoni Thorunna speciosus Rudman, 1990: synonym of Thorunna speciosa Thorunna tura Ev. Marcus & Er. Marcus, 1967: synonym of Mexichromis tura
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