The only time we have seen one of these was in 1999 when several grab samples were taken by researchers using a dredge in water over 30 metre depth.

Lampshells belong to the  Brachiopods. They resemble bivalves but are unrelated . A good example of convergent evolution. Lampshells appear commonly in the fossil record ,  and although, both bivalves and lampshells have two shells, however they are not related. Bivalves have shells that are symmetrical mirror images of each other, whereas with lamphells, the two shells and the internal structures are very different.