Pupinella thaitranbaii (Do, 2017) Jirapatrasilp & Sutcharit & Panha, 2022

Jirapatrasilp, Parin, Sutcharit, Chirasak & Panha, Somsak, 2022, Annotated checklist of the operculated land snails from Thailand (Mollusca, Gastropoda, Caenogastropoda): the family Pupinidae, with descriptions of several new species and subspecies, and notes on classification of Pupina Vignard, 1829 and Pupinella Gray, 1850 from mainland Southeast Asia, ZooKeys 1119, pp. 1-115 : 1

Pupinella thaitranbaii (Do, 2017) comb. nov.

Pupina thaitranbaii Do, 2017: 302, 303, figs 2b, 3b. Type locality: limestone forest in Pa Cop Village, Van Ho Commune, Van Ho District, Son La Province, Vietnam.

Type material examined.

Holotype HNUE-OC 00109 figured in Do (2017: figs 2b, 3b).

Diagnosis.

Shell ovate-fusiform; last whorl ca. two-thirds of shell height. Apertural lip expanded and slightly reflected; apertural lip curved when observed from lateral view. Parietal callus somewhat thickened and cord-like. Parietal tooth thickened, fin-shaped, covering posterior canal. Anterior canal forming a long gutter, extending into a spike-like protrusion. Umbilicus open and deep.

Differential diagnosis.

Pupinella thaitranbaii can be distinguished from all other species in mainland Southeast Asia by having an anterior canal forming a long gutter and extending into a spike-like protrusion, a curved apertural lip when observed from lateral view, and an open and deep umbilicus.

Distribution.

Known only from the type locality ( Do 2017).

Remarks.

This taxon is allocated to the genus Pupinella due to the presence of a funnel-like anterior canal, which is the diagnostic character of this genus.