Rizosceras Hyatt, 1884

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 : 92

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.15150631
persistent identifier	https://treatment.plazi.org/id/93268783-962D-707D-FD97-FC19FAB6FB13
treatment provided by	Plazi
scientific name	Rizosceras Hyatt, 1884
status

Treatment

Genus Rizosceras Hyatt, 1884

Type species

Orthoceras indocile Barrande, 1866 from Kocorc, Bohemia, Czech Republic, Middle Silurian; by original designation.

Diagnosis

Compressed, rapidly enlarging, straight to faintly curved brevicones with hyponomic sinus and distinct, faintly rugose transverse surficial ornament; siphuncle ventrally positioned near conch margin; septal necks cyrtochoanitic; siphuncular segments cardioid in dorsoventral section. (Adopted from Sweet 1964b.)

References

Copyright notice

No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.

Taxonomy

Kingdom	Animalia
Phylum	Mollusca
Class	Cephalopoda
SubClass	Multiceratoidea
Family	Oncoceratidae

Specimens

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