Eosomichelinoceras borealis Kröger & Pohle 2021, sp. nov. ...
Eosomichelinoceras borealis sp. nov. urn:lsid:zoobank.org:act: C53AC527-FC9D-4433-A853-5BF9AE4C2B6C Figs 12C, F–G, 13B, 28C, 33C–E, 39–40 Diagnosis Eosomichelinoceras with circular to slightly compressed conch cross section; conch in early growth stages slightly curved; shell surface ornamented with...
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Zenodo
2021
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| Online Access: | https://dx.doi.org/10.5281/zenodo.5795810 https://zenodo.org/doi/10.5281/zenodo.5795810 |
| Summary: | Eosomichelinoceras borealis sp. nov. urn:lsid:zoobank.org:act: C53AC527-FC9D-4433-A853-5BF9AE4C2B6C Figs 12C, F–G, 13B, 28C, 33C–E, 39–40 Diagnosis Eosomichelinoceras with circular to slightly compressed conch cross section; conch in early growth stages slightly curved; shell surface ornamented with narrowly spaced transverse striae which form shallow hyponomic sinus at concave side of conch curvature; siphuncle eccentric, at convex side of conch curvature with rSP of 0.36, relative siphuncle diameter (rSD) ca 0.16 of corresponding conch cross section; septal necks loxochoanitic during earliest growth stages, orthochoanitic during later ontogeny; ca three chambers per length similar to corresponding conch cross section; connecting ring thin, tubular or slightly expanded. Etymology From ancient Greek ‘Βορέας’, ‘north wind’. Type material Holotype Specimen FMNH-P30279. Paratypes Fourty-one specimens (FMNH-P30171, P30182, P30193, P30278, P30280 to P30318, P30434; see Supp. file 1 for list of specimens) from ... : 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 58-60, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 ... |
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