Hemicoanella occulta Kröger & Pohle 2021, sp. nov. ...

• Main Authors: Kröger, Björn, Pohle, Alexander
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Cephalopoda; Tetrabranchia; Protocycloceratidae; Hemicoanella; Hemicoanella occulta; Hinlopenstretet; Ny Friesland; Spitsbergen
• Online Access: https://dx.doi.org/10.5281/zenodo.5794308; https://zenodo.org/doi/10.5281/zenodo.5794308

Hemicoanella occulta sp. nov. urn:lsid:zoobank.org:act: F8F91097-8EF4-454F-8317-F4AA1A270616 Figs 32C, 33A–B Diagnosis Hemichoanella with ca three directly transverse annulations at distance similar to conch diameter and ornamented additionally with finely transverse striae; conch cross section circular; angle of expansion ca 5°; relatively wide marginal siphuncle with rSD of 0.36; septal necks hemichoanitic. Etymology From ‘hidden’, in Latin ‘ occultus ’, because of its Catoraphiceras -like external morphology. Type material Holotype Specimen FMNH-P30420; by monotypy. Type locality and horizon From Profilstranda section, adjacent Hinlopenstretet, Ny Friesland, Spitsbergen; bed PO 131, 128 m above base of Olenidsletta Member, V 2b trilobite zone, Blackhillsian, Floian. Description The holotype is a ca 17 mm long fragment of a phragmocone with a slightly compressed or circular conch cross section with a conch height of 7–8.4 mm (angle of expansion ca 5°). The conch is annulated with ca three directly ... : 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 48-49, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 ...