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Land snail Cylindrus obtusus (Draparnaud, 1805) is an endemic of Eastern Alps. The mollusk has very unusual for helicids pupilloid shell, but its reproductive tract is quite typical for the subfamily Ariantinae (Helicidae). Neither this species nor any similar forms are totally absent in fossil deposits (the earliest records of C. obtusus conventionally dated by the "pre-Pleistocene"). According to suggested hypothesis, this species is very young and was formed within the existing area at the end of Würm glaciation due to mutation of some representative of Ariantinae.

О происхождении Cochlopupa (= Cylindrus auct.) obtusa (Gastropoda, Pulmonata, Helicidae)
Шилейко А.A. ;