Pteropoda {order} - Mollusca; Gastropoda;

Pteropoda (common name pteropods, from the Greek meaning "wing-foot") are specialized free-swimming pelagic sea snails and sea slugs, marine opisthobranch gastropods. Most live in the top 10 m of the ocean and are less than 1 cm long. The monophyly of Pteropoda is the subject of a lengthy debate; they have even been considered as paraphyletic with respect to cephalopods. Current consensus, guided by molecular studies, leans towards interpreting the group as monophyletic. Pteropoda encompasses the two clades Thecosomata, the sea butterflies, and Gymnosomata, the sea angels. The Thecosomata (lit. "case-body") have a shell, while the Gymnosomata ("naked body") do not. The two clades may or may not be sister taxa; if not, their similarity (in that they are both pelagic, small, and transparent, and both groups swim using wing-like flaps (parapodia) which protrude from their bodies) may reflect convergent adaptation to their particular lifestyle. full article at Wikipedia

Specimen Records:	4,710	Public Records:	3,370
Specimens with Sequences:	3,937	Public Species:	188
Specimens with Barcodes:	3,378	Public BINs:	221
Species:	203
Species With Barcodes:	188
Species List - Progress		Access Published & Released Data

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United States 337 Panama 6 Spain 2 Canada 326 Norway 3 Russia 2 Mexico 80 Colombia 3