Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov.
Litoceras profilbekkenense sp. nov. urn:lsid:zoobank.org:act: 847E0904-7D05-46EF-81F3-EDA8A5F740A7 Figs 44B, 46–47 Diagnosis Litoceras with relatively slender, rapidly enlarging conch, with WER of 2.3; with reniform, depressed conch cross section and WWI of ca 1.3; ornamented with fine growth lines...
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ftzenodo:oai:zenodo.org:5795817 2023-05-15T17:48:31+02:00 Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov. Kröger, Björn Pohle, Alexander 2021-12-20 https://zenodo.org/record/5795817 https://doi.org/10.5281/zenodo.5795817 unknown info:eu-repo/semantics/altIdentifier/url/http://zoobank.org/847E0904-7D05-46EF-81F3-EDA8A5F740A7 info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/5F4487ACFFEEFFEDFD907C7FFD0479C7 info:eu-repo/semantics/altIdentifier/lsid/urn:lsid:zoobank.org:act:847E0904-7D05-46EF-81F3-EDA8A5F740A7 doi:10.5852/ejt.2021.783.1601 http://zenodo.org/record/5793422 http://publication.plazi.org/id/A37DFFD4FFACFFAEFFD67F14FFDE7A64 doi:10.5281/zenodo.5793558 doi:10.5281/zenodo.5793564 doi:10.5281/zenodo.5793566 http://zoobank.org/071EAD63-05ED-4D6C-AC45-8719E6D79E0B doi:10.5281/zenodo.5795816 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5795817 https://doi.org/10.5281/zenodo.5795817 oai:zenodo.org:5795817 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities, pp. 1-102 in European Journal of Taxonomy 783(1) 67-68 Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tarphycerida Trocholitidae Litoceras Litoceras profilbekkenense info:eu-repo/semantics/other publication-taxonomictreatment 2021 ftzenodo https://doi.org/10.5281/zenodo.579581710.5852/ejt.2021.783.160110.5281/zenodo.579355810.5281/zenodo.579356410.5281/zenodo.579356610.5281/zenodo.5795816 2023-03-10T19:17:50Z Litoceras profilbekkenense sp. nov. urn:lsid:zoobank.org:act: 847E0904-7D05-46EF-81F3-EDA8A5F740A7 Figs 44B, 46–47 Diagnosis Litoceras with relatively slender, rapidly enlarging conch, with WER of 2.3; with reniform, depressed conch cross section and WWI of ca 1.3; ornamented with fine growth lines which run obliquely across the flanks and form broad hyponomic sinus; the siphuncle is relatively wide, ca 0.25 of apertural height, and at a distance of 0.25 of the corresponding apertural height from the dorsum. Etymology Referring to the Profilbekken River near the type locality. Type material Holotype Specimen FMNH-P30329; by monotypy. Type locality and horizon From Profilstranda section, Ny Friesland, Svalbard, PO 131, 128 m above base of Olenidsletta Member, Blackhillsian, Floian. Description This specimen is a tectonically distorted fragment of a phragmocone and parts of a ca 180° long body chamber with a conch diameter of 86 mm (Fig. 46). The base of the body chamber is at a conch diameter of 58 mm, where the conch has ca three volutions, a whorl height of 21 mm, an apertural height of 20 mm and a conch width of 28 mm. The WER of the conch at the base of the body chamber is 2.3 (see Fig. 47 for comparison). In cross section the whorls are reniform and show a very broad, almost flattened venter and rounded flanks. The conch surface is ornamented with pronounced growth lines and is otherwise smooth or with very low ribs. The septal perforation at the base of the body chamber is subcentrally positioned at a distance of ca 5 mm from the dorsal margin and has a diameter of ca 5 mm. The sutures are simple and directly transverse. Remarks This specimen falls within the range of variability of Trocholitoceras walcotti with respect to the IZR, WWI, and general conch cross section shape (see Fig 47); however, at a comparable conch size it has a much larger WER than T. walcotti and the siphuncle is wider and subcentrally positioned, as seen in Litoceras. Litoceras calciferum (Billings, 1865), L. insolens (Billings, ... Other/Unknown Material Ny Friesland Svalbard Zenodo Ny Friesland ENVELOPE(16.847,16.847,79.498,79.498) Svalbard |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tarphycerida Trocholitidae Litoceras Litoceras profilbekkenense |
spellingShingle |
Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tarphycerida Trocholitidae Litoceras Litoceras profilbekkenense Kröger, Björn Pohle, Alexander Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov. |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tarphycerida Trocholitidae Litoceras Litoceras profilbekkenense |
description |
Litoceras profilbekkenense sp. nov. urn:lsid:zoobank.org:act: 847E0904-7D05-46EF-81F3-EDA8A5F740A7 Figs 44B, 46–47 Diagnosis Litoceras with relatively slender, rapidly enlarging conch, with WER of 2.3; with reniform, depressed conch cross section and WWI of ca 1.3; ornamented with fine growth lines which run obliquely across the flanks and form broad hyponomic sinus; the siphuncle is relatively wide, ca 0.25 of apertural height, and at a distance of 0.25 of the corresponding apertural height from the dorsum. Etymology Referring to the Profilbekken River near the type locality. Type material Holotype Specimen FMNH-P30329; by monotypy. Type locality and horizon From Profilstranda section, Ny Friesland, Svalbard, PO 131, 128 m above base of Olenidsletta Member, Blackhillsian, Floian. Description This specimen is a tectonically distorted fragment of a phragmocone and parts of a ca 180° long body chamber with a conch diameter of 86 mm (Fig. 46). The base of the body chamber is at a conch diameter of 58 mm, where the conch has ca three volutions, a whorl height of 21 mm, an apertural height of 20 mm and a conch width of 28 mm. The WER of the conch at the base of the body chamber is 2.3 (see Fig. 47 for comparison). In cross section the whorls are reniform and show a very broad, almost flattened venter and rounded flanks. The conch surface is ornamented with pronounced growth lines and is otherwise smooth or with very low ribs. The septal perforation at the base of the body chamber is subcentrally positioned at a distance of ca 5 mm from the dorsal margin and has a diameter of ca 5 mm. The sutures are simple and directly transverse. Remarks This specimen falls within the range of variability of Trocholitoceras walcotti with respect to the IZR, WWI, and general conch cross section shape (see Fig 47); however, at a comparable conch size it has a much larger WER than T. walcotti and the siphuncle is wider and subcentrally positioned, as seen in Litoceras. Litoceras calciferum (Billings, 1865), L. insolens (Billings, ... |
format |
Other/Unknown Material |
author |
Kröger, Björn Pohle, Alexander |
author_facet |
Kröger, Björn Pohle, Alexander |
author_sort |
Kröger, Björn |
title |
Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov. |
title_short |
Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov. |
title_full |
Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov. |
title_fullStr |
Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov. |
title_full_unstemmed |
Litoceras profilbekkenense Kröger & Pohle 2021, sp. nov. |
title_sort |
litoceras profilbekkenense kröger & pohle 2021, sp. nov. |
publishDate |
2021 |
url |
https://zenodo.org/record/5795817 https://doi.org/10.5281/zenodo.5795817 |
long_lat |
ENVELOPE(16.847,16.847,79.498,79.498) |
geographic |
Ny Friesland Svalbard |
geographic_facet |
Ny Friesland Svalbard |
genre |
Ny Friesland Svalbard |
genre_facet |
Ny Friesland Svalbard |
op_source |
Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities, pp. 1-102 in European Journal of Taxonomy 783(1) 67-68 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://zoobank.org/847E0904-7D05-46EF-81F3-EDA8A5F740A7 info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/5F4487ACFFEEFFEDFD907C7FFD0479C7 info:eu-repo/semantics/altIdentifier/lsid/urn:lsid:zoobank.org:act:847E0904-7D05-46EF-81F3-EDA8A5F740A7 doi:10.5852/ejt.2021.783.1601 http://zenodo.org/record/5793422 http://publication.plazi.org/id/A37DFFD4FFACFFAEFFD67F14FFDE7A64 doi:10.5281/zenodo.5793558 doi:10.5281/zenodo.5793564 doi:10.5281/zenodo.5793566 http://zoobank.org/071EAD63-05ED-4D6C-AC45-8719E6D79E0B doi:10.5281/zenodo.5795816 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5795817 https://doi.org/10.5281/zenodo.5795817 oai:zenodo.org:5795817 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.579581710.5852/ejt.2021.783.160110.5281/zenodo.579355810.5281/zenodo.579356410.5281/zenodo.579356610.5281/zenodo.5795816 |
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