Xenotrichula quadritubulata
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Xenotrichula quadritubulata
Dorsal cuticular formations at terminal part of trunk.
France, La Manche, Roscoff (Trezen ar Skoden).
7/26/1982
GE03'05-820726'JJK
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It occurs in submarine dune Trezen ar Skoden where a coarse shell gravel is deposited by strong tidal current, at depth of 50-55 m.