Hypselostoma emergens (van Benthem Jutting, 1950) comb. nov.

Figs 224 B, 226, 241

Gyliotrachela emergens van Benthem Jutting, 1950: 34–35, fig. 20.

Gyliotrachela emergens — van Benthem Jutting 1950: 45; Zilch 1984: 165; Maassen 2001: 75.

Type material examined.

Malaysia • 54 paratypes; from the type locality; 1939; Raffles Museum, Singapore ex. coll.; RMNH.Moll.137150 .

Additional material examined.

Malaysia • 2 shells; Perlis, ca 2 km S of Bukit Keteri (NE of Kangar); 22 Mar. 1998; Hemmen leg.; coll. PGB .

Type locality.

“ Bukit Chuping, Perlis ”, Malaysia.

Differential diagnosis.

See under H. modestum .

Distribution.

This species is known from Bukit Chuping (type locality) and Bukit Keteri (this study), both located in Perlis, N Peninsular Malaysia.

Remarks.

Some of the paratypes have more or less protruding and detached last whorl. Also, variability is observed in the keel near the aperture, it can be more or less sharp / pronounced.