Boucardicus must have microtunnels! Reassignment of three species into Acroptychia (Gastropoda: Caenogastropoda: Hainesiidae)

Páll-Gergely, Barna (2025) Boucardicus must have microtunnels! Reassignment of three species into Acroptychia (Gastropoda: Caenogastropoda: Hainesiidae). ZOOTAXA, 5666 (2). pp. 287-293. ISSN 1175-5326

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Abstract

Boucardicus is a Madagascan endemic genus of the family Hainesiidae (subfamily Boucardicinae). The over 200 known species are variable in terms of shell shape, but their common trait is the presence of pre-constriction ribs, under which microtunnels run. Here we report three Boucardicus species without microtunnels, and as a consequence, transfer them to the genus Acroptychia as follows: Acroptychia boulangeri (Fischer-Piette, C.P. Blanc, F. Blanc & Salvat, 1993), Acroptychia (?) culminans (Fischer-Piette, C. P. Blanc, F. Blanc & F. Salvat, 1993) and Acroptychia (?) optio (Fischer-Piette, C. P. Blanc, F. Blanc & F. Salvat, 1993). The variability of the genus Acroptychia is briefly discussed.

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