A sea butterfly.
- ‘The pteropod, Cfione limacina (Order: Gymnosomata) differs from the nudibranchs and notaspids discussed so far in that it swims continuously using paired parapodial appendages that resemble wings.’
- ‘These all feed on pteropods, or sea butterflies, one of the species most threatened by rising acidity.’
- ‘In addition to its operation in some insects, it has been suggested that the flapping mechanism in the pteropod, Clione limacina, uses a clap-and-fling mechanism.’
Mid 19th century: from modern Latin Pteropoda (plural), from Greek pteron wing + pous, pod- foot.