Diplommatina rubra Godwin Austen, 1889  

Godwin-Austen (1889) original descriptions on Diplommatina rubra – “Shell sinistral, rimate, fusiform, elongate, turreted; sculpture minute, close, slightly raised transverse costulation; colour rich ruddy amber; spire high, sides slightly convex; apex jointed; suture moderately impressed; whorls 7, sides flat on apical, convex below, the last rising on the penultimate, antepenultimate the largest; aperture broadly oval, sub-oblique; peristome double, the outer thin and expanded; columellar tooth small.”

Kobelt (1902) descriptions on Gastroptychia rubra – “Schale linksgewunden, geritzt, getürmt spindelförmig, dicht und fein gerippt, lebhaft rötlich bernsteinfarben; Gewinde hoch, mit leicht gewölbten Seiten; Naht massig eingedrückt; 7 Windungen, die obersten flach, die unteren gewölbt, letzte ansteigend, drittletzte am gTössten; Mündung breit eiförmig, ziemlich schräg; Mundrand doppelt, äusserer dünn, ausgebreitet; Spindelzahn klein.”

Vermeulen (1993) descriptions on Diplommatina rubra – “Shell sinistral, fusiform to almost conical, with the last whorl slightly moved inwards but still widest; sides flat or slightly convex. Whorls 7 3/8, slightly convex. Suture slightly impressed. Constriction level with the parietal side of the peristome, with (?, only observed through shell wall) 1 parietalis, 1 oblique longitudinal palatalis, 1 transversal palatalis, 1 columellaris. Tuba 7/8 whorl. Radial ribs not sinuous, distinct, low, rather thin, densely placed (8 ribs/0.5 mm on the penultimate whorl). Spiral striation absent. Umbilicus closed. Aperture hardly tilted with regard to the coiling axis; columellaris distinct, directed downwards. Peristome double, expanding; palatal side not sinuous, without edge; basal side without edge; basal edge not sinuous, somewhat angular; outer peristome somewhat expanding beyond the inner; inner peristome without palatal lip, free and erect on the columellar side, somewhat expanding on the parietal side.”