Westonoceratidae are exogastric, mostly compressed, Discosorida of moderate size from the Middle Ordovician to the Lower Silurian.

The siphuncle is typically close to the convexly curved outer margin of the phragmocone – the chambered part of the shell – taken to be ventral but may be more central in some genera.

Connecting rings are thin to moderately thick with inflated bullettes grasping the previous septal foremina.

In turn, the Westonoceratidae gave rise to a small group of discosorids, the Lowoceratidae, which form an intermediary step before the Discosoridae.

Two principal lineages have been identified, both stemming from the genus Teichertoceras, a derivative of Ulrichoceras.