Description: Shell small for family (length to 4.0 mm), strongly arched, elevated (height/ length -0.5). Protoconch 320 mu in length, smooth with microscopic crystals forming a finely reticulated, netlike surface along initial 3/4 whorl, smooth, finely pitted thereafter. Teleoconch tall, recurved, with strongly convex anterior slope. Protoconch near posterior margin of shell, below midpoint of shell height, overhanging slightly concave posterior slope, which, measured from protoconch to posterior margin, comprises —15% of shell length. Shell margin smooth, continuous. Teleoconch white, with clathrate sculpture of strong, concentric ribs crossed by low radial ridges, forming nearly equilateral rectangles. Periostracum light brown, thin, mostly worn in examined specimens. Aperture planar, oval, with lateral sides nearly parallel. Interior surface smooth, U-shaped muscle scar barely discernible. An¬imal unpigmented, cephalic tentacles cylindrical, right tentacle serving as cop¬ulatory organ. Eyes absent. Oral lappets broad laterally, narrow along anterior margin of oral disk. Oral disk continuous and heavily ciliated anteriorly, interrupted posteriorly. Single pair of reduced epipodial tentacles. Radula weakly asymmetrical, skewed right. Rachidian tooth narrow, with outer edges weakly defined, distal third of tooth narrower, with prominent central cusp flanked by two to three smaller cusps on each side. Three inner lateral teeth) with slender shafts and recurved cusps that are subdivided into denticles on first and second lateral teeth. Fourth lateral (pluricuspid) tooth massive, tricuspid, with central cusp largest. Marginal teeth similar in size, with elongated and flattened shafts, ending in strongly hooked, serrated cusps.
Type locality: Western part of Cayman Trench, 19°00.6'N, 80°29.5'W, 6800 m, on pieces of wood, R/V Akademik Kurchatov, cruise 14, station 1242-A, 2.5 m Sigsbee trawl, 20 March 1973.