Beloitoceras Foerste, 1924

Kröger, Björn, 2025, The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia, European Journal of Taxonomy 978, pp. 1-169 : 78

Genus Beloitoceras Foerste, 1924

Type species

Oncoceras pandion Hall, 1861 , from Beloit, Wisconsin, USA, Black River Formation; by original designation.

Diagnosis

Strongly curved, relatively slender brevicones with ovate, compressed cross section; conch smooth or with fine transverse ornament; maximum conch diameter situated within adapical half to third of body chamber; antisiphuncular outline of conch concave over entire length in dorsoventral section, prosiphuncular outline broadly convex; five to eight chambers per distance similar to corresponding conch cross section; body chamber short with well-developed hyponomic sinus at convex side; siphuncle slender, situated close to convex margin of conch curvature, with subtubular segments; septal necks short suborthochoanitic to cyrtochoanitic; connecting rings thin. (Compiled from Sweet 1964b, and Frey 1995.)