New species, misidentifications and problematic taxonomy of some Atlantic South American marine mollusks: a review Simone, Luiz Ricardo L. Papéis Avulsos de Zoologia 2024 2024-08-09 64 1 104 7NVXG Grobben 1894 [379,541,1306,1331] Bivalvia Animalia 83 84 Mollusca subClass Autobranchia     Kalolophus antillarum(Reeve, 1842)   Remarks:  K.antillarumis designated with the typelocality"ad insulam Margaritta, Antillarum," along the Venezuelan Caribbean coast. Its distribution is relatively restrict- ed, spanning from the Antilles to Venezuela,and typically found at depths ranging from 13 to 64 meters. Despite this, MolluscaBase (2023) lists numerous synonyms for  K. antillarum,with typelocalities situated along the Pacific coasts of North, Central, and even South America. Some of these synonyms include fossil species, such as a Tertiary fossil from Braziland another Cenozoic fossil from Peru. Upon thorough examination, it was observed that the shells of these synonyms exhibit distinctions from the  K. antillarum typesdeposited in BMNH. Due to these differences,coupled with geographical and temporal disparities, these synonymies are not currently considered valid. Further research is required to establish the taxonomic status of these entities, which possibly are valid.