Nybyoceras Troedsson, 1926

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 : 15

publication ID	https://doi.org/10.5852/ejt.2025.978.2801
publication LSID	lsid:zoobank.org:pub:422E6F06-B4C8-4840-854C-811145D88B32
DOI	https://doi.org/10.5281/zenodo.14988408
persistent identifier	https://treatment.plazi.org/id/93268783-9678-7028-FDB6-FE36FB68FD0F
treatment provided by	Plazi
scientific name	Nybyoceras Troedsson, 1926
status

Treatment

Genus Nybyoceras Troedsson, 1926 View in CoL

Type species

Actinoceras (Nybyoceras) bekkeri Troedsson, 1926 from Niibi, Estonia, Pirgu Regional Stage, late Katian; by original designation.

Diagnosis

Slender straight shell, eccentric siphuncle; adnation areas broad ventrally on posterior side of segments; dorsally on adoral side; septal necks very short and adnate to adoral surface of septa, endosiphuncular canal system reticulate to curved, branching radial canals. (Compiled from Teichert 1964.)