Species of gastropod
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Megasurcula tremperiana is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.
Taxonomy.
There is some confusion about the accepted name for this species. The website Gastropods.com considers this species a synonym of "Mangelia carpenteri" It was also considered a synonym of "Bathytoma tremperiana" , itself considered by W.H. Dall a synonym of "Cryptoconus tremperianus" . But then WoRMS considers this last name a synonym of "Megasurcula carpenteriana" 
Description.
The length of the shell attains 60 mm.
Distribution.
This marine species occurs off California.
References.
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