Bythiospeum articense Bernasconi, 1985

Known distribution: southern Ardèche to to central Gard. Stygobiont.
Specimen collected in Les Angostrines karst spring, 44°07’08.8”N 4°14’20.3”E, east of Alès, Gard. Altitude ≈ 170m. 2,8mm.

Same spot. 2,6-2,75mm.

Font Méjanne, Saint-Alban Auriolles, southern Ardèche. Altitude ≈ 180m. 2,3-2,4-2,3mm.
The whorls are less convex, the suture is shallower than in bourguignati; the outline is more conical, much less slender than in garnieri.

Same spring. The early whorls of this group can show some spiral sculpture.

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