Bactroceras fluvii Kröger & Pohle 2021, sp. nov. ...
Bactroceras fluvii sp. nov. urn:lsid:zoobank.org:act: A0C49BC7-0551-4BD0-ABC5-77A446BBF5D1 Figs 12D, 29A, C–D, 30 Diagnosis Bactroceras with smooth shell or very faint transverse ornamentation; angle of expansion relatively low, ca 5°; siphuncle slightly expanded within chambers, marginal; diameter...
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Zenodo
2021
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| Online Access: | https://dx.doi.org/10.5281/zenodo.5794383 https://zenodo.org/doi/10.5281/zenodo.5794383 |
| Summary: | Bactroceras fluvii sp. nov. urn:lsid:zoobank.org:act: A0C49BC7-0551-4BD0-ABC5-77A446BBF5D1 Figs 12D, 29A, C–D, 30 Diagnosis Bactroceras with smooth shell or very faint transverse ornamentation; angle of expansion relatively low, ca 5°; siphuncle slightly expanded within chambers, marginal; diameter of siphuncle ca ¹/5 of the corresponding conch diameter during early growth stages, increasing during ontogeny. Etymology From the Latin ‘ fluvius ’, ‘river’, referring to the type locality of this species. Type material Holotype Specimen FMNH-P30177. Paratypes One additional specimen from type locality and horizon and 18 specimens from Profilbekken river basin, locality PR-phosphatic, adjacent to Hinlopenstretet, Spitsbergen, uppermost Olenidsletta Member, V3 trilobite zone, Dapingian. Type locality and horizon From Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, topmost exposed layer ca 153 meters above the base of the Olenidsletta Member, V 3 trilobite zone, Dapingian. Description The holotype ... : 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 42-44, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 ... |
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