19 mm

Protoconch 3 whorls, somewhat worn, whorls pliculose, cancellate on lower half. Postnatal whorls profile shouldered slightly above middle of whorl. Slightly oblique axial ribs from shoulder to suture, petering out on base, 13 on 1st whorl, 15 on 2nd, 16 on 3rd, and 19 on last whorl. No spiral sculpturing, except 12-15 feeble lirae on rostrum. Sulcus slightly concave, lip sinus shallow. Growth-lines distinct on sulcus, some of them pliculose below the suture. 19 x 9 mm. No operculum. White, glossy, protoconch yellowishbrown (faded).
Animal pale, eyes present. Radula with 25 pairs of dagger-like, barbed and flanged teeth, base broad and concave.

Shell 18.8 x 8.6 mm, white, with glossy surface. Protoconch of three preserved whorls (at least 1-1.5 initial whorls missing), diameter 1.25 mm. Protoconch sculpture not well preserved, consisting of arcuate axial riblets passing from suture to suture. Riblets on lower halt of whorl diagonally crossed by oblique riblets beginning at lower suture. Teleoconch of 4.75 whorls. First whorl angulate slightly above periphery, penultimate whorl at about 1/3 of whorl height. Oblique axial ribs beginning just above whorl angulation, slightly weaken below, and reaching lower suture and upper shell base. Ribs 15 on penultimate whorl, 18 on bodywhorl. Spiral sculpture of obscure striations below whorl angulation, feeble threads on lower part of shell base and canal. Based on growth lines, anal sinus very shallow as compared to congeners.

This species agrees well with the subgenus Theta Clarke 1959 in the shell outline and sculpture. The protoconch is very similar to that of G. chariessa (Watson, 1881) (see Bouchet & Waren, 1980 figs. 254, 255). but larger than in that species. The radular teeth are tvpical of Gymnobela. Gymnobela (T.) chrysopelex is closely related to G. (T.) chariessa, but differs, in having a shallower anal sinus, larger protoconch, and less oblique axial ribs.

Deep Sea , 1500-1760 fathoms