Acmella Blanford, 1869

Vermeulen, Jaap J., Liew, Thor-Seng & Schilthuizen, Menno, 2015, Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species, ZooKeys 531, pp. 1-139 : 2

Taxon classification Animalia Littorinimorpha Assimineidae

Genus Acmella Blanford, 1869

Acicula subgenus Acmella W.T. Blanford, 1869: 178. Acmella (W.T. Blanford) Nevill, 1878: 251.

Diagnosis for the Sabah species.

Land snails. Spire without constriction. Umbilicus often with a slight periomphalic thread starting on the columellar side of the peristome, close to the columellar corner, and spiralling (steeply) upwards. Peristome usually not or hardly hardly thickened (except sometimes in gerontic shells).

Remarks.

Within several species long and slender shells occur next to shorter and wider ones. The periomphalic thread is sometimes inconspicuous and difficult to see, a mere strip of somewhat rougher sculpture that betrays its presence by the dirt that accumulates around it.

The family typically inhabits intratidal and supratidal environments. Only few genera live in fresh water or on land.

We divide the genus into two informal groups.