Order Sacoglossa Ihering 1876 (snail)
PaleoDB taxon number: 12259
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, Nudibranchia, Pseudofusia, Reticulacella, Rhodopemorpha, Scorbinidola, Tectibranchia, Thecosomata, Umbraculomorpha
Subtaxa: Arthessidae, Elysiacea, Elysioidea, Limapontioidea, Oxynooidea, Santia
Ecology: epifaunal