Nyfrieslandoceras, Kröger & Pohle, 2021

Kröger, Björn & Pohle, Alexander, 2021, Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities, European Journal of Taxonomy 783 (1), pp. 1-102 : 72

Genus Nyfrieslandoceras gen. nov.

urn:lsid:zoobank.org:act:46CA8144-915D-4392-90B9-7F123D2BE411

Type species

Nyfrieslandoceras bassleroceroides gen. et sp. nov.

Diagnosis

Slightly curved slender conch with compressed conch cross section; ornamented with distinct irregularly spaced growth lines, which form hyponomic sinus at convex side of conch curvature; chambers are narrowly spaced, ca nine per distance similar to corresponding conch height; sutures form broad lateral lobe; siphuncle thin and nearly marginal at convex side of conch curvature, with slightly expanded segments; septal necks short, thickened achoanitic.