Aartsenia

Aartsenia is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies. The species in this genus are very large compared to the Odostomias, looking like inflated Odostomias. Their sculpture consists of very fine lines of growth and still finer wavy closely placed spiral striations. The vast majorit...
Found on http://en.wikipedia.org/wiki/Aartsenia
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