The shell of
Westonoceras forms a humped
exogastric cyrtocone with its greatest height (gibbosity) at the anterior part of the mature
phragmocone and posterior body chamber. The early juvenile portion is slender, gently exogastric or straight and rapidly increasing in size. Curvature increases during development. The
dorsum, on the longitudinally concave side, is broadly rounded. The venter, on the longitudinally convex side, is narrow. The
siphuncle is located close to the ventral wall. Segments are box-shaped and strongly expanded. Septal necks are strongly recumbent; connecting rings thick, with inflated
bullettes.
Parietal deposits grow forward from the
septal foremina, commonly forming a continuous internal lining. Cameral deposits are common. ==Phylogeny==