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Umbraculidae
The family Umbraculidae has usually been considered monotypic with a single circumtropical species, Umbraculum umbraculum. However, it appears to contain several distinct forms that can be consistently distinguished based on tubercle form, shell calcification and color suggesting the possibility that it includes multiple species. Three species may be present in Hawaii (all in the genus Umbraculum). Assignment of the original type material for Umbraculum umbraculum to any of them seems to be ambiguous, however. So, we're listing all three as "sp. #" pending further work.


Umbraculum sp. #1

Umbraculum sp. #2

Umbraculum sp. #3

 
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