Genus Danoceras Troedsson, 1926

Type species

Danoceras ravni Troedsson, 1926, Cape Calhoun, northern Greenland, Cape Calhoun series, Late Ordovician; by original designation.

Diagnosis

Slender diestoceratids with straight or slightly curved shell, and compressed conch cross section with narrow venter and / or dorsum; mature body chamber with widest height and width near its base, with simple constriction close to mature aperture, with apertural widening and shallow hyponomic sinus; siphuncle positioned near conch margin, cyrtochoanitic; necks recumbent, segments elongate, subtrapezoidal in longitudinal section; thin annulosiphonate deposits with distinctive irregular linear processes, which extend adapically and adorally without fusing from segment to segment. (Compiled from Strand 1934, and Sweet 1964b.)