Proterocameroceras valhallfonnense Kröger & Pohle 2021, sp. nov. ...

Proterocameroceras valhallfonnense sp. nov. urn:lsid:zoobank.org:act: A94148C2-2CBC-438E-B4C9-36EAE5161A76 Figs 9H–I, 10B–D, 11C Diagnosis Slender orthocones with smooth shell and with weakly depressed conch cross section with a relative conch width (rW) of ca 1.1–1.2; chambers are relatively widely...

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Bibliographic Details
Main Authors: Kröger, Björn, Pohle, Alexander
Format: Text
Language:unknown
Published: Zenodo 2021
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Online Access:https://dx.doi.org/10.5281/zenodo.5793469
https://zenodo.org/doi/10.5281/zenodo.5793469
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Summary:Proterocameroceras valhallfonnense sp. nov. urn:lsid:zoobank.org:act: A94148C2-2CBC-438E-B4C9-36EAE5161A76 Figs 9H–I, 10B–D, 11C Diagnosis Slender orthocones with smooth shell and with weakly depressed conch cross section with a relative conch width (rW) of ca 1.1–1.2; chambers are relatively widely spaced, ca four–six chambers occur per distance similar to the corresponding conch height; the siphuncle is ca ⅓ of the diameter of the corresponding conch height. Etymology From Valhallfonna Glacier, referring to the type region of this species. Type material Holotype Specimen FMNH-P30427. Paratypes Specimens FMNH-P30277 and P30429 from type locality and horizon. Type locality and horizon Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, bed PO 131, 128 m above base of Olenidsletta Member, V 2b trilobite zone, Blackhillsian, Floian. Description The holotype is the most complete fragment of this species; it is a 21 mm long fragment of a phragmocone which grows from 10–12 mm in conch height with an ... : 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 pages 16-19, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 ...