Svalbardoceras Kröger & Pohle 2021, gen. nov.
Genus Svalbardoceras gen. nov. urn:lsid:zoobank.org:act: AE232B80-8CB8-45F8-A9BA-80620CD0D41C Type species Svalbardoceras sterna gen. et sp. nov.; Early Ordovician, late Floian, Olenidsletta Member, Valhallfonna Formation Öland, Spitsbergen. Diagnosis Weakly curved endogastric longicones with angle...
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ftdatacite:10.5281/zenodo.5795796 2023-05-15T17:48:31+02:00 Svalbardoceras Kröger & Pohle 2021, gen. nov. Kröger, Björn Pohle, Alexander 2021 https://dx.doi.org/10.5281/zenodo.5795796 https://zenodo.org/record/5795796 unknown Zenodo http://zenodo.org/record/5793422 http://publication.plazi.org/id/A37DFFD4FFACFFAEFFD67F14FFDE7A64 http://zoobank.org/071EAD63-05ED-4D6C-AC45-8719E6D79E0B https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5852/ejt.2021.783.1601 http://zenodo.org/record/5793422 http://publication.plazi.org/id/A37DFFD4FFACFFAEFFD67F14FFDE7A64 http://zoobank.org/071EAD63-05ED-4D6C-AC45-8719E6D79E0B https://dx.doi.org/10.5281/zenodo.5795795 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tetrabranchia Rioceratidae Svalbardoceras Taxonomic treatment article-journal Text ScholarlyArticle 2021 ftdatacite https://doi.org/10.5281/zenodo.5795796 https://doi.org/10.5852/ejt.2021.783.1601 https://doi.org/10.5281/zenodo.5795795 2022-02-08T18:05:53Z Genus Svalbardoceras gen. nov. urn:lsid:zoobank.org:act: AE232B80-8CB8-45F8-A9BA-80620CD0D41C Type species Svalbardoceras sterna gen. et sp. nov.; Early Ordovician, late Floian, Olenidsletta Member, Valhallfonna Formation Öland, Spitsbergen. Diagnosis Weakly curved endogastric longicones with angle of expansion 5° to 7°; shell ornamented with shallow, irregularly spaced undulations, which are more pronounced in later growth stages, and with fine but distinct irregularly spaced directly transverse, imbricate growth lines; three to four chambers occur per distance similar to the corresponding conch cross section; thin marginal siphuncle with rSD ≈ ⅛ to ¹/6, siphuncle marginally, or nearly so, positioned at concave side of conch curvature; septal necks loxochoanitic to orthochoanitic; connecting ring relatively thick with slightly concave segments, almost tubular, endosiphuncular and cameral deposits not known. Etymology Referring to Svalbard, the type region of this genus. Comparison This new genus is unique within the Rioceratidae in having a combination of relatively wide septal spacing, a thin marginal siphuncle and an ornamentation with shallow, irregularly spaced undulations that are more pronounced in later growth stages. The similarly annulated and weakly curved Felinoceras Kröger & Evans, 2011 differs in having a narrower septal spacing and a distinctive annulation throughout its growth. Semiannuloceras Evans, 2005 differs in possessing, in addition, a longitudinal ornamentation. The conch of Rioceras Flower, 1964 is smooth throughout its entire growth. : 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 29-30, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 : {"references": ["Kroger B. & Evans D. H. 2011. Review and palaeoecological analysis of the late Tremadocian - early Floian (Early Ordovician) cephalopod fauna of the Montagne Noire, France. Fossil Record 14: 5 - 34. https: // doi. org / 10.1002 / mmng. 201000013", "Evans D. H. 2005. The Lower and Middle Ordovician cephalopod faunas of England and Wales. Monograph of the Palaeontographical Society 628: 1 - 81.", "Flower R. H. 1964. The nautiloid order Ellesmeroceratida (Cephalopoda). State Bureau of Mines and Mineral Resources, New Mexico Institute of Mining and Technology, Memoir 12: 1 - 164."]} Text Ny Friesland Svalbard Spitsbergen DataCite Metadata Store (German National Library of Science and Technology) Svalbard Noire ENVELOPE(140.019,140.019,-66.666,-66.666) Ny Friesland ENVELOPE(16.847,16.847,79.498,79.498) Valhallfonna ENVELOPE(17.566,17.566,79.743,79.743) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tetrabranchia Rioceratidae Svalbardoceras |
spellingShingle |
Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tetrabranchia Rioceratidae Svalbardoceras Kröger, Björn Pohle, Alexander Svalbardoceras Kröger & Pohle 2021, gen. nov. |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tetrabranchia Rioceratidae Svalbardoceras |
description |
Genus Svalbardoceras gen. nov. urn:lsid:zoobank.org:act: AE232B80-8CB8-45F8-A9BA-80620CD0D41C Type species Svalbardoceras sterna gen. et sp. nov.; Early Ordovician, late Floian, Olenidsletta Member, Valhallfonna Formation Öland, Spitsbergen. Diagnosis Weakly curved endogastric longicones with angle of expansion 5° to 7°; shell ornamented with shallow, irregularly spaced undulations, which are more pronounced in later growth stages, and with fine but distinct irregularly spaced directly transverse, imbricate growth lines; three to four chambers occur per distance similar to the corresponding conch cross section; thin marginal siphuncle with rSD ≈ ⅛ to ¹/6, siphuncle marginally, or nearly so, positioned at concave side of conch curvature; septal necks loxochoanitic to orthochoanitic; connecting ring relatively thick with slightly concave segments, almost tubular, endosiphuncular and cameral deposits not known. Etymology Referring to Svalbard, the type region of this genus. Comparison This new genus is unique within the Rioceratidae in having a combination of relatively wide septal spacing, a thin marginal siphuncle and an ornamentation with shallow, irregularly spaced undulations that are more pronounced in later growth stages. The similarly annulated and weakly curved Felinoceras Kröger & Evans, 2011 differs in having a narrower septal spacing and a distinctive annulation throughout its growth. Semiannuloceras Evans, 2005 differs in possessing, in addition, a longitudinal ornamentation. The conch of Rioceras Flower, 1964 is smooth throughout its entire growth. : 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 29-30, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 : {"references": ["Kroger B. & Evans D. H. 2011. Review and palaeoecological analysis of the late Tremadocian - early Floian (Early Ordovician) cephalopod fauna of the Montagne Noire, France. Fossil Record 14: 5 - 34. https: // doi. org / 10.1002 / mmng. 201000013", "Evans D. H. 2005. The Lower and Middle Ordovician cephalopod faunas of England and Wales. Monograph of the Palaeontographical Society 628: 1 - 81.", "Flower R. H. 1964. The nautiloid order Ellesmeroceratida (Cephalopoda). State Bureau of Mines and Mineral Resources, New Mexico Institute of Mining and Technology, Memoir 12: 1 - 164."]} |
format |
Text |
author |
Kröger, Björn Pohle, Alexander |
author_facet |
Kröger, Björn Pohle, Alexander |
author_sort |
Kröger, Björn |
title |
Svalbardoceras Kröger & Pohle 2021, gen. nov. |
title_short |
Svalbardoceras Kröger & Pohle 2021, gen. nov. |
title_full |
Svalbardoceras Kröger & Pohle 2021, gen. nov. |
title_fullStr |
Svalbardoceras Kröger & Pohle 2021, gen. nov. |
title_full_unstemmed |
Svalbardoceras Kröger & Pohle 2021, gen. nov. |
title_sort |
svalbardoceras kröger & pohle 2021, gen. nov. |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://dx.doi.org/10.5281/zenodo.5795796 https://zenodo.org/record/5795796 |
long_lat |
ENVELOPE(140.019,140.019,-66.666,-66.666) ENVELOPE(16.847,16.847,79.498,79.498) ENVELOPE(17.566,17.566,79.743,79.743) |
geographic |
Svalbard Noire Ny Friesland Valhallfonna |
geographic_facet |
Svalbard Noire Ny Friesland Valhallfonna |
genre |
Ny Friesland Svalbard Spitsbergen |
genre_facet |
Ny Friesland Svalbard Spitsbergen |
op_relation |
http://zenodo.org/record/5793422 http://publication.plazi.org/id/A37DFFD4FFACFFAEFFD67F14FFDE7A64 http://zoobank.org/071EAD63-05ED-4D6C-AC45-8719E6D79E0B https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5852/ejt.2021.783.1601 http://zenodo.org/record/5793422 http://publication.plazi.org/id/A37DFFD4FFACFFAEFFD67F14FFDE7A64 http://zoobank.org/071EAD63-05ED-4D6C-AC45-8719E6D79E0B https://dx.doi.org/10.5281/zenodo.5795795 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC0 |
op_doi |
https://doi.org/10.5281/zenodo.5795796 https://doi.org/10.5852/ejt.2021.783.1601 https://doi.org/10.5281/zenodo.5795795 |
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1766154657168621568 |