Typhis insolitus: Shell medium-sized for the subgenus, up to 16.9 mm in length at maturity (holotype). Spire high, with 5 teleoconch whorls and broken protoconch. Suture impressed. Each whorl with 4 varices. Varices of last teleoconch whorl sharp, adaperturally squamose, with 3 short, narrowly open, broad spines. Shoulder spine adapically bent. Spines connected on each other with varicial flange extending almost to the tip of siphonal canal (paratype). Axial sculpture of fine, numerous striae. No trace of spiral sculpture except darker coloured spiral lines that interconnect varicial spines. A weakly flattened anal tube originates about midway between each pair of varices, forming an angle of approximately 50° with the axis of the shell. Aperture rounded, rim strongly erect, forming an entire peristome. Siphonal canal long, sealed, with 2 or 3 small open spines covered by varicial flange. Light brown with 6 darker fine spiral lines, 4 on last teleoconch whorl and 2 on siphonal canal.

Typhis insolitus: (Holotype): L-B: 16.9 X 8.3 mm; Aperture: 2.4 X 1.8 mm; Siphonal Channel: 7 mm; Anal tube: 2.3 mm; Anal tube angle:: 50°.

Typhis insolitus: Loyalty Ridge