27 Rishetia akouktoungensis (Godwin-Austen, 1920) comb. nov.

Fig. 13 A – C

Glessula akouktoungensis Godwin-Austen, 1920: 55. Type locality: Akouktoung on Irawady, Pegu [Akauk Taung (hill), Pyay District, Bago Region, Myanmar].

Type specimens.

Syntypes NHMUK 1906.1. 1.2207 [re-registered in error as 1985138] (6 shells; Fig. 13 A – C). ex. W. T. Blanford ex. Godwin-Austen collection from Akouktoung, Pegu .

Diagnosis.

Shell elongate, turreted, and regularly attenuated; apex rounded; subsequent whorls nearly smooth and with coarse radial ridges near suture. Suture impressed and whorls flattened convex. Aperture broadly ovate; columella strong, concave, and truncated.

Distribution.

The species is currently known from its type locality, in which the modern name is Akauk Taung [hill, ~ 18 ° 30 ' 33.7 " N, 95 ° 06 ' 48.5 " E], south of Htone Bo (or Tonbo) Village, Padaung Township, Pyay District, Bago Region].

Remarks.

The original description did not include an illustration, and only one set of measurements was given. Godwin-Austen’s description was based on one lot of specimens which clearly stated ‘ Type No. 2207.06. 1.1 B. M. ’ (NHMUK 1906.1. 1.2207). There are six specimens from the NHMUK type collection with the original label stating ‘ Type’. The specimen that has a similar shell measurements as given in the original description and with pink wool inside the shell is figured herein (Fig. 13 A). Other shells from the same syntype lot are also illustrated (Fig. 13 B, C).