The Thecosomata (collective/plural: thecosomes, meaning "case/shell-body"), or sea butterflies, are a taxonomic suborder of small, pelagic, free-swimming...

also applied to the shelled Thecosomata. Recent molecular data suggest the Gymnosomata form a sister group to the Thecosomata (other planktonic, weakly...

Pteropoda encompasses the two clades Thecosomata, the sea butterflies, and Gymnosomata, the sea angels. The Thecosomata (lit. "case-body") have a shell, while...

They are holoplanktonic opisthobranch gastropod molluscs in the clade Thecosomata. Some groups within this superfamily possess a shell in the adult stage...

sea snails, pteropods, pelagic marine gastropod mollusks in the clade Thecosomata (sea butterflies). Genera within the family Limacinidae include: Altaspiratella...

Heterobranchia Informal group Opisthobranchia Clade Cephalaspidea Clade Thecosomata Clade Gymnosomata Clade Aplysiomorpha Group Acochlidiacea Clade Sacoglossa...

the common name sea butterflies. Sea butterflies are part of the clade Thecosomata. Sea angels, similar to Limacina, are in the order Gymnosomata. Both...

hares Suborder Notaspidea P. Fischer, 1883 – sidegill slugs Suborder Thecosomata Blainville, 1824 sea butterflies with shells Suborder Gymnosomata Blainville...

butterflies. They belong to the suborder Euthecosomata. Sea butterflies (thecosomata) are pelagic marine gastropods, so called because they swim by flapping...

Aplysiomorpha, have a small, flat, proteinaceous internal shell. The clades Thecosomata and Gymnosomata are small pelagic gastropods known as "sea butterflies"...