Genus Corolla Dall, 1871
Corolla is probably composed of only one species as all the described taxa may be considered synonymous. However, the four species are treated separately. Corolla spectabilis is the type species. They are shell-less pteropods with a large gelatinous slipper-like pseudoconch, 4 cm long. The pseudoconch is broad-oval. The wings are disc-shaped and the visceral mass forms a dark nucleus embedded in the perfectly transparent pseudoconch (Corolla ovata).
[4 species]