Arinia streptaxiformis Vermeulen, 1996
“About 5% of the specimens of a sample from Batu Tenggar has the tuba partly detached from the spire.” (Vermeulen, 1996)
Vermeulen (1996) original descriptions on Arinia streptaxiformis – “Shell more or less cylindrical, last two whorls widest. Whorls (43/8-)5-5 5/8, convex, last whorl sometimes moderately convex. Tuba (1/2-)3/4-1 1/4 whorl, with a rounded, well demarcated ridge on the columellar side (corresponding with a similar furrow inside); often with a short, longitudinal tooth in palatal, basal or almost columellar position, close to the constriction. Radial ribs on the top whorls single-crested, 5-11 ribs/0.5 mm. towards the penultimate whorl double-crested usually with the distal crest highest, on the penultimate whorl 3-6 ribs/0.5 mm, above the aperture 4-5 ribs/0.5 mm, ribs close to the peristome often single-crested again. Spiral striation fine. Umbilicus open, 0.25-0.65 mm wide. Aperture not turned upwards, or sometimes slightly so, furrow in the tuba often just visible on the columellar side. Peristome: palatal side usually distinctly protruding beyond the penultimate whorl, columellar side hardly to moderately sinuous; outer peristome hardly to moderately spreading beyond the inner on the palatal and basal side, abruptly narrowed on the columellar side and towards the angular edge; inllcr pcrislomc somewhat protruding from the outer, moderately spreading, just above the angular edge with a protrusion about parallel to the margin, palatal side below this protrusion with a distinct transverse furrow, palatal and basal side without a lip parallel to the margin, its outer surface with few fine lamellae.”
Arinia streptaxiformis – “Height (1.5-)1.6-2.1 mm; width (0.9-) 1-1.4 mm; index 1.3-1.8. Height aperture 0.45-0.50 mm; width 0.4-0.5 mm.” (Vermeulen, 1996)
Type locality – “Borneo. Sabah. Tawau Zone: Bt. Pababola, Segarong Hills 25 km ESE of Kunak” (Vermeulen, 1996)
Other locality – “Borneo. Sabah. Tawau Zone: Batu Tenggar, Segarong Hills 25 km ESE of Kunak” (Vermeulen, 1996)