Chersaecia nagaensis (Godwin-Austen, 1875)

Páll-Gergely, Barna, 2018, Systematic revision of the Plectopylinae (Gastropoda, Pulmonata, Plectopylidae), European Journal of Taxonomy 455, pp. 1-114 : 46

Chersaecia nagaensis (Godwin-Austen, 1875)

Diagnosis

Shell small, sinistral, domed or depressed-conical, dorsal side with dense reddish stripes that are often obscured by thick, brown periostracum; parietal wall with a single lamella and a short lower plica; main plica present or absent; palatal plicae horizontal, might be connected with a vertical ridge.

Differential diagnosis

Chersaecia nagaensis differs from C. leiophis in the following traits: shell smaller, spire higher, umbilicus narrower, body whorl rounded (shouldered in leiophis ), periostracum denser, intermediate plica absent, or small and separated from the lamella. Chersaecia goniobathmos is similar to C. nagaensis in shell shape and sculpture, but differs from that species by possessing two lamellae, a long lower plica, and a well-developed intermediate plica, which is in contact with the anterior lamella.