Acochlidiacea, common name acochlidians, are a taxonomic clade of very unusual sea snails and sea and freshwater slugs, aquatic gastropod mollusks within the large clade Heterobranchia. Acochlidia is a variant spelling.
According to the taxonomy of Bouchet & Rocroi (2005), Strubellioidea was a taxonomic superfamily of sea slugs, mostly marine gastropod mollusks within the informal group Opisthobranchia.
Acochlidiidae are a taxonomic family of shell-less freshwater gastropods, aquatic gastropod mollusks within the clade Acochlidiacea.
Hedylopsis is a genus of sea slugs, marine gastropod mollusks within the clade Acochlidiacea.
Asperspina is a genus of sea slugs, marine gastropod mollusks within the clade Acochlidiacea.
Parhedylidae are a taxonomic family of sea slugs, marine gastropod mollusks in the superfamily Parhedyloidea.
Tantulum elegans is a species of freshwater slug, an aquatic shell-less gastropod mollusk within the clade Acochlidiacea.
Strubellia paradoxa is a species of freshwater slug, a shell-less freshwater gastropod, an aquatic gastropod mollusk within the clade Acochlidiacea.
Pseudunela cornuta is a species of minute sea slug, an acochlidian, a shell-less marine and temporarily brackish gastropod mollusk in the family Pseudunelidae. Adults are about 3 mm long and live in the spaces between sand grains.
Pseudunela espiritusanta is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusk in the family Pseudunelidae.
Aiteng is a genus comprising three species of sea slug, A. ater and A. mysticus being found in intertidal zones while A. marefugitus is fully terrestrial. Aiteng is the only genus in the family Aitengidae. The generic name Aiteng is derived from the name of a black puppet Ai Theng, which is one of the shadow play puppets in southern Thailand.
Paraganitus ellynnae is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusc in the family Parhedylidae.
Parhedyle cryptophthalma is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusc in the family Parhedylidae.
Aiteng mysticus is a species of sea slug in the family Aitengidae, found around Hisamatsu, Miyako-jima, Okinawa, Japan. Morphologically it clearly belongs to the Aitengidae, but it shows differences to Aiteng ater at genus or species level. Its affinity to Aiteng ater is confirmed by comparison of the mitochondrial 16S rRNA sequences.
Pontohedyle verrucosa is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusc in the family Parhedylidae.
Pontohedyle milaschewitchii is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusk in the family Parhedylidae.
Pontohedyle is a genus of sea slugs, acochlidians, shell-less marine gastropod mollusks in the family Parhedylidae. Sea slugs in this genus are highly simplified and uniform.
Pseudunela viatoris is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusk in the family Pseudunelidae.
Pseudunela marteli is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusk in the family Pseudunelidae.
