Acroptychia (?) culminans (Fischer-Piette, C. P. Blanc, F. Blanc & F. Salvat, 1993), 1877

Páll-Gergely, Barna, 2025, Boucardicus must have microtunnels! Reassignment of three species into Acroptychia (Gastropoda: Caenogastropoda: Hainesiidae), Zootaxa 5666 (2), pp. 287-293 : 289-291

Acroptychia (?) culminans (Fischer-Piette, C. P. Blanc, F. Blanc & F. Salvat, 1993)

Fig. 2C–D

Boucardicus culminans Fischer-Piette, C. P. Blanc, F. Blanc & F. Salvat, 1993: 63 , fig. 46.

Material examined. Madagascar, chaines Anosyennes, N. de Fort-Dauphin, Dte Foret = arrés du Souvet, 1900 m.; MNHN-IM 2000-35177 ( holotype), MNHN-IM-2000-35178 ( 3 paratypes) .

Remarks. The holotype and paratypes of Boucardicus culminans lack microtunnels. We could see the exact position of the operculum indicated by a thickening, and we have seen no opening on the inner side of the thickening.

Emberton (2002: 49, pl. 3, fig. 12) and Emberton and Pearce (1999: 351, figs 9, 40, 52, 54, 62) figured specimens under this species, but the illustrated specimens probably do not belong to A. culminans , as they possess a prominent swelling anterior to the constriction and the shell colouration lacks spiral bands. Instead, they likely belong to a Boucardicus species (although I have only examined photos in that paper).

Figures

FIGURE 2. Shells of Madagascan Hainesiidae (species previously classified in Boucardicus). A–B. Acroptychia boulangeri (Fischer-Piette, C.P. Blanc, F. Blanc & Salvat, 1993), MNHN-IM-2000-35172 (holotype). C–D. Acroptychia (?) culminans (Fischer-Piette, C. P. Blanc, F. Blanc & F. Salvat, 1993), MNHN-IM 2000-35177 (holotype). E–F. Acroptychia (?) optio (Fischer- Piette, C. P. Blanc, F. Blanc & F. Salvat, 1993), MNHN-IM-2000-35176 (holotype). All photos: B. Páll-Gergely.