Shell large, 87 mm high, fusiform, spire height comprising 40% of shell height, with long and broad canal. Color of periostracum light brown, with abapically to whorl periphery a band of dark reddish-brown rectangular blotches on axial ribs. Whorls strongly angulate, with wide concave subsutural ramp covered by very fine spiral threads. Suture shallow. Axial ribs very strong, widely spaced, oblique, gradually weakening towards base of last whorl. Spiral sculpture of strong, rounded and widely spaced cords, occasionally with additional secondary cord in interspaces. Interspaces covered by 2-4 fine spiral threads. Cords equally strong on axial ribs and between them. Anal sinus deep, wide and rounded, deepest point just below middle of subsutural ramp. Outer lip projecting forward below sinus.
DESCRIPTION (holotype). Shell solid, elongate fusiform, with a high turreted spire consisting of 13.5 whorls strongly angulated somewhat above periphery, with a wide, concave subsutural ramp. Protoconch and first 2-3 teleoconch whorls eroded, but protoconch probably paucispiral. Suture well defined, shallow, straight. Axial ribs very strong, rather sharp, widely spaced, opisthocline, produced adapically without forming a knob, entirely traversing spire whorls, gradually weakening abapically, abruptly stopping on shell base; 10 on penultimate whorl and 8 on last whorl. Subsutural ramp covered by very fine and closely set spiral threads. Spiral cords below ramp coarse, rounded, equally strong on axial ribs and between them; interspaces broader than cord, with 2-4 coarse threads and occasionally an additional secondary cord. Base almost flat, smoothly continuous with canal. Canal long, proportionally very broad, and slightly curved adaxially. Inner lip of aperture weakly and rather evenly concave, with thin, longitudinally rugose callus. Outer lip projecting moderately forward below sinus. Anal sinus deep, wide and rounded, deepest point just below middle of subsutural ramp. Shell covered by thin, firmly attached light brown periostracum, with abapically to whorl periphery a reddish-brown band forming distinctly darker rectangular blotches on axial ribs, most clearly visible on wet shell. Dimensions: height 87.1 mm, last whorl height 52.3 mm, aperture height 42.7 mm, diameter 27.5 mm.

The sculpture and general colour pattern resemble those of C. ilariae Bozzetti, 1991, but Comitas rex clearly differs by having angulate whorls with stronger axial ribs and concave subsutural ramp, and much broader canal. Another similar species is C. kaderlyi (Lischke, 1872), which, however, is characterized by more numerous and weaker axial ribs and finer spiral sculpture.

Type Location: Indonesia. Karubar. Tinambar Islands.