Knoutsodonta is a genus of dorid nudibranchs in the family Onchidorididae.[2] The radular teeth are an unusual shape[3] and a molecular phylogeny study showed that they are not closely related to some other species of Onchidoris within which genus they were formerly placed.[1]
^Alvim, J.; Padula, V.; Pimenta, A. D. (2011). "First record of the genus Onchidoris (Gastropoda: Nudibranchia: Onchidorididae) from the South Atlantic Ocean, with the description of a new species from Brazil". Journal of the Marine Biological Association of the United Kingdom. 91 (2): 505–511. doi:10.1017/S002531541000202X.