Arinia valkenburgi Vermeulen, 1996
“Known from two widely distant localities. Specimens from the Meratus Mts. differ slightly from those from the type locality in lacking spiral striation, and in having a deeply sinuous, almost notched peristome on the columellar side. More material may show that two taxa are involved.” (Vermeulen, 1996)
Vermeulen (1996) original descriptions on Arinia valkenburgi – “Shell conical with almost flat sides, last whorl widest. Whorls 4 3/4-5, convex. Tuba 1/4 whorl. Radial ribs single-crested, on the top whorls 4-6 ribs/0.5 mm, on the penultimate whorl 4-6 ribs/0.5 mm, above the aperture, with 4-8 ribs/0.5 mm. Spiral striation absent or present, fine. Umbilicus open, 0.1-0.2 mm wide. Aperture not turned upwards. Peristome: palatal side moderately protruding beyond the penultimate whorl, columellar side slightly to deeply sinuous; outer peristome moderately spreading beyond the inner on the palatal and basal side, rather abruptly narrowed on the columellar side and towards the angular edge; inner peristome distinctly protruding from the outer, widely spreading, just above the angular edge with, a ridge oblique to the margin, at the right side or which a furrow, palatal and basal side without or with at most a poorly demarcated lip parallel to the margin, its outer surface and the upper surface of the outer peristome with numerous coarse lamellae.”
Arinia valkenburgi – “Height 2.0-2.4 mm: Width 1.11.5 mm; index 1.5-1.9. Height and Width aperture 0.4-0.5 mm.” (Vermeulen, 1996)
Type locality – “Borneo. Kalimantan Timur: oad Bontang-Sangatta, 6 km N of junction with roa into Kutei National Park.” Leg. Valkenburg & Galzin (Vermeulen, 1996)
Other localities – “Borneo. Kalimantan Selatan: limestone escarpments along road Benualawas-Limbungan.” (Vermeulen, 1996)