Diplommatina recta Smith, 1895  

E. A. Smith (1895) original descriptions on Diplommatina recta – “Testa dextrorsa, ovata, superne acuminate, cornea; anfractus 6, perconvexi, lamellis tenuissimis obliquis numerosis ornati, ultimus penultimum subaequans; aperture irregulariter rotundata, verticalis; peristoma incrassatum, expansum, duplex, marginibus conniventribus, callo tenui junctis, columellari intus dente acuto munito.”

Diplommatina recta from Balabac – “Testa minor, Paulo angustior, pallide rufescens.” (E. A. Smith, 1895)

Kobelt (1902) descriptions on Diplommatina (Diplommatina) recta – “Schale rechtsgewunden, eiförmig, oben spitz, mit dichten, dünnen, schrägen Lamellen, fleischfarben; 6 sehr gewölbte Windungen, letzte so gross wie die vorletzte; Mündung senkrecht, unregelmässig abgerundet; Mundrand verdickt, ausgebreitet, doppelt, kurz unterbrochen und durch dünnen Callus verbunden; Spindelrand mit spitzem Zahn.

Vermeulen (1993) descriptions on Diplommatina recta – “Shell dextral, more or less conical, last whorl moved inwards but still widest. Whorls 6 1/8-6 3/4, convex. Suture impressed. Constriction level with the edge between the parietal and columellar side of the peristome, with (?) 1 parietalis (observed through the shell wall only), 1 longitudinal palatalis at the level of the peristome, 1 transversal palatalis, 1 columellaris. Tuba ¾ whorl. Radial ribs straight, rather distinct, rather low, rather thin, densely placed (6-7 ribs/0.5 mm on the penultimate whorl). Spiral striation fine, inconspicuous. Umbilicus closed. Aperture hardly tilted with regard to the coiling axis; columellaris distinct, directed downwards. Peristome double, expanding; palatal side not or hardly sinuous, without edge; basal side without edge; basal edge not sinuous, rounded; outer peristome (hardly) expanding beyond the inner; inner peristome with a palatal lip, free and erect on the columellar side, little expanding on the parietal side.”