Etremopsis
"Etremopsis is distinguished from other "clathurellines" (e.g. Clathurella Carpenter, 1857; Etrema Hedley, 1918; Glyphostoma Gabb, 1972) primarily by having a much less strongly armoured aperture, and particularly in lacking inner lip denticles or tubercles other than the parietal one."(Beu and Raine 2009)
Height 4-8 mm, fusiform, spire moderately elevated. Protoconch conical, of 5-6 whorls, first whorl globular, remainder sharply keeled, a few opisthocyrt costellae on last whorl. Microsculpture of short, discontinuous axial threads, and fine granules. Teleoconch whorls convex or angled last whorl with short neck; sculpture of prominent axial costae and spiral cords and threads; microsculpture of ubiquitous fine granules. Aperture constricted posteriorly by parietal tubercle, no other denticles on inner lip; anterior siphonal canal short; outer lip with well developed varix, lirate within; anal sinus moderately deep and narrow, on sutural ramp.