Vitrina letourneuxi

?Vitrina letourneuxi(Bourguignat, 1864) Figs 72, 73 Vitrina letourneuxi – Bourguignat 1864: 303 – Sommet du petit atlas de Blida, près du marabout de Sidi-Abd-el-Kader. Sturany 1909: 292 – Algeria. Vitrina? letourneuxi – Forcart 1959: pl. 1, fig. 1 (Lectotype) – Kleiner Atlas von Blida beim Marabout Sidi-Abd-el-Kader, 1600 m. Material examined. No specimens in our samples. Diagnosis. Shell vitrinid-like, apex slightly immersed, spire with 3 1 / 2 convex whorls; the first 2 1 / 2–3 whorls with a microsculpture of spirally arranged pits; radial striae near the suture and irregularly subplicate last whorl; transversely oblong aperture; peristome with rounded basal margin and columellar margin folded on the umbilicus; shell maximum height (H): 3 mm, shell maximum diameter (D): 5 mm. Based on Bourguignat’s original description, the mollusc can withdraw completely into the shell; it has a transparent, greyish-white body; the mantle is darker at the edges and covers most of the spire; the large tentacles are brown-violet; the rear part of the body is pointed and slightly brownish. Genitalia Unknown. Distribution. So far known only from the type locality: at the top of the small atlas of Blidah, near the marabout of Sidi-Abd-el-Kader. Ecology. ? Vitrina letourneuxi lives under moist debris of shavings, branches, and needles of Cedrus atlantica ((Endl.) Manetti ex Carrière, 1855). Remarks. Sturany (1909) hypothesised a close relationship between? V. letourneuxi and the endemic Oligolimax species from Libya. Forcart (1959) rejected this hypothesis and suggested that the Algerian species belongs to the genus Vitrina. In our opinion, based on the descriptions of Bourguignat (1864) and Forcart (1959) and its geographical isolation, it cannot be excluded that? V. letourneuxi belongs to other unknown or unexpected vitrinid genera. This question can only be resolved by studying genital morphology and / or by molecular analysis.