Bathymophila diadema is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.Bouchet, P. (2013). Bathymophila diadema (B. A. Marshall, 1999). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=740723 on 2013-11-14
Distribution This marine species occurs off Papua New Guinea, New Caledonia, the Solomon Islands and the Loyalty Islands at depths between .
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