Nyfrieslandoceras Kröger & Pohle 2021
- Dataset
- Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities
- Rank
- GENUS
- Published in
- 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): 1-102, DOI: 10.5852/ejt.2021.783.1601, URL: http://dx.doi.org/10.5852/ejt.2021.783.1601
Classification
- phylum
- Mollusca
- class
- Cephalopoda
- order
- Tetrabranchia
- family
- Rioceratidae
- genus
- Nyfrieslandoceras
description
urn: lsid: zoobank. org: act: 46 CA 8144 - 915 D- 4392 - 90 B 9 - 7 F 123 D 2 BE 411
diagnosis
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.
type_taxon
Type species Nyfrieslandoceras bassleroceroides gen. et sp. nov.