Genus Cyptendoceras Ulrich & Foerste, 1936

Type species

Cyptendoceras ruedemanni Ulrich & Foerste, 1936; from Fort Cassin Formation, Floian Stage, from near Fort Cassin, Vermont, USA; by original designation.

Diagnosis

Straight, slender, depressed conchs with short camerae; sutures with ventral lobe, in some forms also dorsal lobe; siphuncle ventral with tubular or faintly concave segments; short septal necks; endosiphuncular rod; cameral deposits adjacent to siphuncle are present (adopted from Flower 1964).