Cyclostomiceras Hyatt 1900

Genus Cyclostomiceras Hyatt, 1900 Type species Gomphoceras cassinense Whitfield, 1886 from the Fort Cassin Formation (Floian) at Fort Cassin headland, Vermont, USA; by original designation. Diagnosis Gomphoceroid, breviconic orthocones with circular to depressed conch cross section; phragmocone expa...

Full description

Bibliographic Details
Main Authors: Kröger, Björn, Pohle, Alexander
Format: Text
Language:unknown
Published: Zenodo 2021
Subjects:
Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Tetrabranchia
Cyclostomiceratidae
Cyclostomiceras
Hyatt
Ny Friesland
Spitsbergen
Online Access:https://dx.doi.org/10.5281/zenodo.5793450
https://zenodo.org/record/5793450
Description
Summary:Genus Cyclostomiceras Hyatt, 1900 Type species Gomphoceras cassinense Whitfield, 1886 from the Fort Cassin Formation (Floian) at Fort Cassin headland, Vermont, USA; by original designation. Diagnosis Gomphoceroid, breviconic orthocones with circular to depressed conch cross section; phragmocone expanding adorally rapidly; anterior half of mature body chamber slightly contracted. Sutures and growth lines straight and directly transverse; siphuncle small, rSD = 0.15, ventral in position but not marginal; septal necks orthochoanitic, connecting rings thick and layered (from King 1998). : Published as part of Kröger, Björn & Pohle, Alexander, 2021, Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities, pp. 1-102 in European Journal of Taxonomy 783 (1) on page 15, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 : {"references": ["King A. H. 1998. A review of the cyclostomiceratid nautiloids, including new taxa from the Lower Ordovician of Oland, Sweden. Palaeontology 41: 335 - 347."]}

Similar Items