Everettia robusta (Gude, 1917)
Diagnostic description:
“Allied to E. aglaja, Pfr., but larger and slightly more depressed.” (Gude, 1917)
Morphology:
Gude (1917) original descriptions on Everettia robusta – “Shell perforate, subcovered, depressed, subconoid, pale brown corneous, shining, regularly and faintly ribbed transversely; apex obtuse, suture ratber deep; whorls 5, increasing rather rapidly, the last three times as wide as the penultimate; convex above and below, rounded at the periphery; aperture subovate; margins acute, distant, upper and outer evenly rounded, lower slightly curved, columellar obliquely ascending, reflected and overhanging the narrow umbilicus.”
Size:
Shell height – 7 mm; Shell width – 11.75-13 mm.
Distribution:
Type locality – “Borneo” (Gude, 1917)