New species Cavernacmella dentata is identified in a limestone cave, indicating unique anatomical traits and phylogenetic relationships.
Cavernacmella dentata Fukuda, Sawada & Kameda, n. sp. is described from the inside of the Sekigahara Limestone Cave, Gifu Prefecture, central Honshū, Japan. The new species is unique in the genus and the Assimineidae in having a strong fold on the parietal lip of the aperture, but according to its internal anatomy and a molecular phylogenetic analysis it is a member of Cavernacmella Habe, 1942.
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Sawada et al. (2025) studied this question.
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