Trigonostoma
''Trigonostoma'' is a genus of sea snails, marine gastropod mollusks in the family (biology), family Cancellariidae, the nutmeg snails. ''Trigonostoma'' is also the name given to a trematode genus in the family Aspidogastridae, that is actually a synonym of the genus ''Multicalyx'' Faust & Tang, 1936 Species According to the World Register of Marine Species (WoRMS) the following species with valid names are included within the genus ''Trigonostoma'' : * † ''Trigonostoma ampullaceum'' (Brocchi, 1814) * ''Trigonostoma antiquatum'' (Hinds, 1843) - antique nutmeg * † ''Trigonostoma barnardi'' A. W. Janssen, 1984 * ''Trigonostoma breve'' (G.B. Sowerby I, 1832a) * ''Trigonostoma bullatum'' (G.B. Sowerby I, 1832a) - bubble nutmeg * ''Trigonostoma chui'' Yen, 1936 * ''Trigonostoma diamantinum'' Garrard, 1975 * ''Trigonostoma elegantulum'' (M. Smith, 1947) little elegant nutmeg * † ''Trigonostoma exampullaceum'' (Sacco, 1894) * † ''Trigonostoma exgeslini'' (Sacco, 1894) * ...
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