Epihoplites (including Metaclavites) is
the earliest of a distinct lineage of Late Albian genera including Callihoplites
and Arrhaphoceras. Early forms of Epihoplites are moderately involute,
discoidal, compressed shells, but this lineage soon becomes moderately
evolute, with rounded umbilical margin and whorl flanks which converge
towards a shallow sulcate venter. Ribbing, strong, convex, usually trifurcating
from tuberculate bullae at the umbilical margin; occasionally bifurcating.
Ribs end on the ventro-lateral margin in low, oblique, tuberculate, ventral
clavi projecting onto the venter into a low strut. The en-echelon arrangement
of the clavi across the venter produces a distinct zig-zag aspect.
(Ref H G Owen 1999)