Original Description of Aporrhais angulata by Gabb, 1864:
- "Shell elongated; spire high; whorls numerous, number unknown; upper whorls convex, widest a little below the middle; last whorl sharply and acutely angulated, sloping and gently concave above and below the angle; suture impressed. Surface ornamented by fine, thread-like, revolving lines, and by sinuous lines of growth. Canal long, narrow, straight. Outer lip curved, unicarinate, exact form unknown."
Locus typicus: Bullís Head Point, near Martinez, Contra Costa County, California, USA.
Aporrhais angulata Gabb, 1864, pl. XX, fig. 84