Boysidia salpinx Thompson & Dance, 1983
“This snail occurs at three widely separated localities, yet we can find no significant differences that will distinguish any of the populations. Specimens from Gunong Kapor tend to be larger and more frequently have a subcolumellar lamella, but other characteristics of the shell are typical for the species.” (Thompson & Dance, 1983)
Thompson & Dance (1983) original descriptions on Boysidia (Dasypupa) salpinx – “Shell smalled-sized, about 1.8-2.1 mm high and 2.2-2.6 mm wide. Spire depressed-conical. Shell about 0.70-0.89 times as high as wide. Opaque; reddish-brown with a dull sheen. Umbilicus open, about ¼ width of shell, showing previous whorl. About 4 whorls. Embryonic whorls 1.5m protruding, rounded, sculptured with a dense mesh of fine granules. Succeeding whorls angular at periphery, sculptured with irregularly spaced growth striations that are interspersed with finer, rough periostracal threads. Last whorl bluntly angular and flattened above and below periphery; weakly furrowed above and below angle along last quarter whorl. Last half whorl with a furrow along umbilical wall. Aperture projecting forward for a short distance beyond previous whorl, tilted upward slightly due to ascent of last quarter whorl. Aperture about as wide as high; nearly quadrangular, with a rounded base. Peristome broadly expanded. Interior of aperture with 4-6 teeth. Parietal-angular lamella fused and extending forward nearly to edge of aperture. Palatal plica, basal plica, and columellar lamella short, compressed-tubercular and deeply immersed in aperture. Occasionally a small tubercular supracolumellar and subcolumellar lamella may also be present. Outer surface weakly indented over palatal plica.”
Boysidia (Dasypupa) salpinx – “Length 1.74-2.02, width 2.17-2.60, aper. h. 1.15-1.24, aper. w. 1.27-2.21, whorls 3.9-4.1.” (Thompson & Dance, 1983)
Type locality – “Gunong Subis, a limestone massif about 40 mi SW of Miri, Niah area, Fourth Div., Sarawak, Borneo, 03°51’N, 113°45’E” leg. G. E. Wilford (Thompson & Dance, 1983)
Other localities – “Sarawak: First Div., Bau area, entrance of main cave at Gunong Kapor, 01°17’N, 110°04’E” (Thompson & Dance, 1983); “Sarawak: First Div., Gunong Selabor, an isolated limestone mountain S of Serian, 00°55’N, 110°25’E” (Thompson & Dance, 1983)