Cuthonella is a genus of sea slugs, specifically aeolid nudibranchs, marine gastropod molluscs in the family Cuthonellidae.Vinarski, M. (2024). Cuthonella Bergh, 1884. In: MolluscaBase (2026). Accessed through: World Register of Marine Species on 2026-03-06.
Species Species within the genus Cuthonella include:Cella, K; Carmona Barnosi, L.; Ekimova, I; Chichvarkhin, A; Schepetov, D; Gosliner, T. M. (2016). A radical solution: The phylogeny of the nudibranch family Fionidae. PLoS ONE. 11(12): e0167800.Korshunova T.; Fletcher K.; Martynov A. (2025). The endless forms are the most differentiated—how taxonomic pseudo-optimization masked natural diversity and evolution: the nudibranch case Zoological Journal of the Linnean Society, Volume 204, Issue 4, August 2025, zlaf057, Cuthonella abyssicola Bergh, 1884 Cuthonella punicea Millen, 1986 Cuthonella sandrae Korshunova, N. P. Sanamyan, K. E. Sanamyan, Bakken, Lundin, Fletcher & Martynov, 2020
Known species not provided with an alternate placement in Korshunova et al. (2025): Cuthonella modesta Eliot, 1907
Species originally described in Cuthonella but currently placed in synonymy include: Cuthonella ainu Korshunova, N. P. Sanamyan, K. E. Sanamyan, Bakken, Lundin, Fletcher & Martynov, 2020 : synonym of Nella ainu Cuthonella anastasia Ekimova, Grishina & Nikitenko, 2024 : synonym of Nella anastasia Cuthonella antarctica Eliot, 1907: synonym of Galvinella antarctica Eliot, 1907 Cuthonella benedykti Korshunova, N. P. Sanamyan, K. E. Sanamyan, Bakken, Lundin, Fletcher & Martynov, 2020: synonym of Nella benedykti Cuthonella elioti Odhner, 1944: synonym of Galvinella antarctica Eliot, 1907 Cuthonella berghi Friele, 1903: synonym of Cuthonella abyssicola Bergh, 1884 Cuthonella cocoachroma G. C. Williams & Gosliner, 1979: synonym of Margina cocoachroma Cuthonella concinna Alder & Hancock, 1843 : synonym of Fiocuthona concinna Cuthonella denbei Korshunova, N. P. Sanamyan, K. E. Sanamyan, Bakken, Lundin, Fletcher & Martynov, 2020 : synonym of Nella denbei Cuthonella elenae Martynov, 2000: synonym of Penistella elenae Cuthonella ferruginea Friele, 1903: synonym of Cuthonella abyssicola Bergh, 1884 Cuthonella georgstelleri Korshunova, N. P. Sanamyan, K. E. Sanamyan, Bakken, Lundin, Fletcher & Martynov, 2020: synonym of Nella goergstelleri Cuthonella hiemalis Roginskaya: synonym of Nella hiemalis Cuthonella norvegica Odhner, 1929: synonym of Cuthona norvegica Cuthonella orientosiberica Korshunova, N. P. Sanamyan, K. E. Sanamyan, Bakken, Lundin, Fletcher & Martynov, 2020 : synonym of Nella orientosiberica Cuthonella osyoro Baba, 1940: synonym of Nella osyoro Cuthonella paradoxa Eliot, 1907: synonym of Guyvalvoria paradoxa Cuthonella rgo Korshunova & Martynov, 2022 : synonym of Nella rgo Cuthonella soboli Martynov, 1992: synonym of Nella soboli Cuthonella vasentsovichi Korshunova, N. P. Sanamyan, K. E. Sanamyan, Bakken, Lundin, Fletcher & Martynov, 2020: synonym of Victima vasentsovichi
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