Discartemon sangkarensis Benthem Jutting, 1959

Siriboon, Thanit, Sutcharit, Chirasak, Naggs, Fred, Rowson, Ben & Panha, Somsak, 2014, Revision of the carnivorous snail genus Discartemon Pfeiffer, 1856, with description of twelve new species (Pulmonata, Streptaxidae), ZooKeys 401, pp. 45-107 : 78-79

22. Discartemon sangkarensis Benthem Jutting, 1959 Figs 9C, D, 23

Discartemon sangkarensis - Benthem Jutting 1959: 168-170, fig. 10. Type locality: Batu Sangkar, near Pajakombo, Padang Highlands, Indonesia. Richardson 1988: 184. Marwoto 2008: 191.

Material examined.

Holotype ZMA 3.59.052 (Fig. 9C). Paratypes: ZMA 3.59.053 (1 shell), ZMA 3.59.054 (4 shells), and ZMA 3.59.057 (9 shells).

Remarks.

Shell globose-heliciform, semi-transparent, with a conical spire and distinct suture. Shell surface glossy with fine transverse ridges; following whorls regularly coiled. Last whorl rounded and regularly expanded; umbilicus widely open and deep. Aperture triangular, with sinulus; peristome thickened, expanded and reflected. Apertural dentition of only one parietal lamella (Fig. 9C).

Discartemon sangkarensis differs from Discartemon roebeleni in having a more inflated last whorl, a triangular aperture, in having a sinulus, and the apertural dentition of only one parietal lamella. Compared with Discartemon lemyrei and Discartemon vandermeermohri , Discartemon sangkarensis differs in having a sinulus. Also, Discartemon lemyrei has a relatively larger shell and narrow umbilicus, while Discartemon vandermeermohri has a small basal lamella. Discartemon sangkarensis differs from Discartemon collingei in having a higher spire, the last whorl rounded, more inflated and regularly coiled, and in having a sinulus, a triangular aperture, and only one parietal lamella. Also, Discartemon collingei is slightly axially deflected.