 It is now generally seen as a subgenus of "Oxycerites", differing from "Oxyceratites (O)" in having a broader venter with ventrolateral shoulders.The shell of "Oxycerites", including "O (Alcidellus)" is generally smooth, essentially involute with a small umbilicus, highly compressed with flanks converging on a narrow, somewhat sharp venter.Sutures are ammonitic.