Order Nudibranchia Blainville 1814 (sea slug)
PaleoDB taxon number: 61455
Parent taxon: Opisthobranchia according to P. L. Beesley 1998
Sister taxa: Acanthotrophia, Acochlidea, Anaspidea, Buscotypus, Canepina, Cephalaspida, Cephalaspidea, Cylindrobullinoidea, Floribella, Gymnosomata, Heteroptygmatis, Heterostrophia, Lutima, Mariottia, Mistostigma, Nicosiaella, Notaspidea, Pseudofusia, Reticulacella, Rhodopemorpha, Sacoglossa, Scorbinidola, Tectibranchia, Thecosomata, Umbraculomorpha
Subtaxa: Aeolidina, Arminina, Dendronotina, Doridina
Ecology: epifaunal