Stomacosmethis altispirus ( Moellendorff , 1902)
Alycaeus perakensis altispirus Möllendorff , 1902: 144-145.
Alycaeus (Alycaeus) perakensis altispirus - Zilch 1957: 147, pl. 6, fig. 32.
Alycaeus altispirus - Foon and Liew 2017: 21-23, figs 7A, B, 10, 31A.
Type locality.
"Kelantan, Ostküste der Halbinsel Malacca" (from the title).
Material examined.
Malakka, Kelantan, coll. Möllendorff , SMF 109738 (lectotype, designated by Zilch 1957).
Remarks.
Protoconch very finely granulated, without spiral lines; R1 with irregular, low ribs and very weak spiral striation in-between, approximately same strength; R2 very short, with darker thick and fewer than ten lighter narrower stripes very slightly elevated from the surface.
This taxon was described as a subspecies of A. perakensis . We agree with Foon and Liew (2017) that it should be handled as a species due to the characteristic flat whorls and expanded peristome.