Atalodoris jannae is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.MolluscaBase eds. (2025). MolluscaBase. Atalodoris jannae (Millen, 1987). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1565340 on 2025-09-09
It was frequently mis-identified as Onchidoris muricata. K. jannae is the type species of the genus Knoutsodonta.
Distribution This species was described from Tyee Point, Copper Cove, British Columbia, Canada, (). It is currently known from Prince William Sound, Alaska south to Lion Rock San Luis Obispo County, California.Behrens, D. W., & Hermosillo, A. (2005) Eastern Pacific nudibranchs, a guide to the opisthobranchs from Alaska to Central America. vi + 137 pp., 314 photos. Sea Challengers, Monterey, California, page 57.Rudman, W.B., 2001 (February 25) Adalaria jannae Millen, 1987. [In] Sea Slug Forum. Australian Museum, Sydney. A specimen from Pillar Point, San Mateo County, California was sequenced for the genes 16S, partial 18S, partial 28S, Histone H3, and the DNA barcoding Folmer region of Cox1 and a specimen from Prince William Sound, Alaska was sequenced for 16S and H3 in an investigation which established the genus Knoutsodonta.Hallas J.M. & Gosliner T.M. (2015). Family matters: The first molecular phylogeny of the Onchidorididae Gray, 1827 (Mollusca, Gastropoda, Nudibranchia). Molecular Phylogenetics and Evolution. 88: 16-27
Diet In British Columbia Knoutsodonta jannae is found feeding on Membranipora serrilamella and Membranipora membranacea on blades of large brown algae. In California orange coloured specimens recorded as Adalaria sp. were found feeding intertidally on the orange bryozoan Lyrula hippocrepsis.Jaeckle, W. B. 1984. The opisthobranch mollusks of Humboldt county, California. Veliger 26(3):207- 213. Lemon yellow specimens were reported to feed on Reginella mucronata.McDonald G. R., and Nybakken.W. 1978. Additional notes on the food of some California nudibranchs with a summary of known food habits of California species. Veliger, 21: 1 10-1 19.
See also
Knoutsodonta Onchidoris
References