Shells minute, « narrowly-conic to ovate-conic, usually solid, lacking inner chitinous shell layer, usually nonumbilicate, smooth or with spiral sculpture predominant, axial sculpture present as growth-lines, lamellae or, rarely, ribs. Aperture oval, usually weakly to distinctly angled anteriorty and posteriorly; varix on outer lip broad and strong to absent. Protoconch small, smooth, of about 1¾-2½ convex whorls, planorbid (coiled in one plane) to depressed dome-shaped; first whorl minute, terminated by a distinct varix in some species. Periostracum sometimes well developed, rarely bearing processes. » – W. F. Ponder: “A review of the genera of the Iravadiidae (Gastropoda: Rissoacea) with an assessment of the relationships of the family”, Malacologia vol.25(1), Ann Arbor 1984, p.23.
 

Ceratia pachia excepted, the members of this genus have an elongated spire with a deep suture; the whorls are moderately convex, the last one being longer than the half of the total shell height; the thread-pitch increases faster than the radius of the whorls; the aperture is ovate, entire, enlarged anteriorly, a bit compressed posteriorly. Sculpture made of radial and spiral furrows, more or less marked. Aperture internally smooth. No umbilicus, no columellar callus.
 

Shell « thin, smooth, or with microscopic spiral threads. Aperture simple, oval, outer lip strongly prosocline, lacking a varix; weak posterior angulation present but no posterior sinus; shallowly but broadly excavated anteriorly. Protoconch smooth, of 2½ whorls, lacking a distinct terminal varix, first whorl rising slightly above level of nucleus. » – W. F. Ponder: “A review of the genera of the Iravadiidae (Gastropoda: Rissoacea) with an assessment of the relationships of the family”, Malacologia vol.25(1), Ann Arbor 1984, p.52.