Anauchen Pilsbry, 1917

Gojšina, Vukašin, Hunyadi, András, Sutcharit, Chirasak, Tongkerd, Piyoros, Auffenberg, Kurt, Grego, Jozef, Vermeulen, Jaap J., Reischütz, Alexander & Páll-Gergely, Barna, 2025, A new start? Revision of the genera Anauchen, Bensonella, Gyliotrachela and Hypselostoma (Gastropoda, Eupulmonata, Hypselostomatidae) of Southeast Asia with description of 46 new species, ZooKeys 1235, pp. 1-338 : 1-338

Genus Anauchen Pilsbry, 1917

Anauchen Pilsbry, 1917: 188 .

Diagnosis.

This genus is characterised by the combination of characters: i) a single lamella which is formed by a fusion of angular and parietal lamellae (it can appear bifid in some species, see below); ii) last whorl adnate to, or only very slightly detached from the penultimate; iii) shell surface pasty (dimpled) or finely spirally striated (never rough, sandpaper-like surface); iv) surface of apertural barriers smooth.

Remarks.

The following species possess some exceptions from the aforementioned combination of diagnostic characters for the genus: Anauchen kozari and Anauchen evanidus sp. nov. Both of them have rough (granulated) surfaces of the apertural barriers. Furthermore, A. kozari is much smaller (height 1.25 mm, width 1.3 mm) than all other congeners and has a palatal tubercle (typical for many Bensonella species). However, both species are retained in Anauchen for reasons listed under “ Remarks ” section for these species.