Catoraphiceras undetermined
Catoraphiceras sp. Figs 10A, 32A, 36D Material examined Specimen FMNH-P30425 from Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, bed PO 131, 128 m above base of Olenidsletta Member, V 2b trilobite zone, Blackhillsian, Floian. Description The specimen is a 20 mm long orthoconic frag...
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2021
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Online Access: | https://dx.doi.org/10.5281/zenodo.5795754 https://zenodo.org/record/5795754 |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tetrabranchia Cyptendoceratidae Catoraphiceras Catoraphiceras undetermined |
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Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tetrabranchia Cyptendoceratidae Catoraphiceras Catoraphiceras undetermined Kröger, Björn Pohle, Alexander Catoraphiceras undetermined |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Cephalopoda Tetrabranchia Cyptendoceratidae Catoraphiceras Catoraphiceras undetermined |
description |
Catoraphiceras sp. Figs 10A, 32A, 36D Material examined Specimen FMNH-P30425 from Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, bed PO 131, 128 m above base of Olenidsletta Member, V 2b trilobite zone, Blackhillsian, Floian. Description The specimen is a 20 mm long orthoconic fragment of a phragmocone with a ca 3 mm long basal part of the body chamber. The conch cross section is slightly elliptically depressed with a width of 9.5–10.8 mm and a height of 8.7–9.2 mm (rW = 1.13; angle of expansion of conch height 9°). The ornamentation consists of widely rounded annulations that form a shallow sinus at the prosiphuncular side of the conch and have a distance of ca 3 mm and an amplitude of ca 0.5 mm; the valley and ridges of the annulations are widely rounded. Fine details of the conch surface, which potentially exist, such as growth lines or striae, are not preserved. Roughly one annulation occurs per one chamber. The chambers have a distance of 3–3.5 mm (ca three chambers occur at a distance similar to conch height, rCL = 0.33). The siphuncle is nearly marginal and has a diameter of 3.7 at the adapical end, and 3.9 mm at the adoral end (0.42 of conch height). The connecting ring is thick and consists of slightly concave segments. The shape and length of the septal necks is difficult to interpret because of the poor preservation of the specimen, but they appear to be short orthochoanitic. No cameral or endosiphuncular deposits occur. Remarks This is an annulated orthocone with a large siphuncle, larger than the range given for Catoraphiceras in the diagnosis of Hook & Flower (1977). The assignment of the fragment to Catoraphiceras is justified because all other characters are in agreement with the diagnosis of this genus and there is no other annulated orthocone with a marginal, empty siphuncle with slightly concave segments and short septal necks. Among the species of Catoraphiceras with depressed conch cross section C . colon (White, 1875) and C . resseri Ulrich et al ., 1944 are most similar to specimen FMNH-P30425; the former mainly differs in having an annulation of only 2 annuli per distance similar to corresponding conch height, the latter differs in having a smaller siphuncle with rSD = 0.35. The siphuncle of Catoraphiceras sp. is also larger than the siphuncle of C . ibexense Hook & Flower, 1977 (rSD = 0.24). The single, relatively poorly preserved fragment available from the Olenidsletta Member, however, does not allow for the erection of a new species. The erection of a new species based on this fragmentary specimen is also not possible, because several species are known to contain endosiphuncular deposits, which may or may not exist in more apical, non-preserved, portions of specimen FMNH-P30425. : 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 page 46, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 : {"references": ["Hook S. C. & Flower R. H. 1977. Late Canadian (Zones J, K) cephalopod faunas from southwestern United States. New Mexico Bureau of Mines and Mineral Resources, Memoir 32: 1 - 102.", "Ulrich E. O., Foerste A. F., Miller A. K. & Unklesbay A. G. 1944. Ozarkian and Canadian cephalopods. Part III: Longicones and summary. Geological Society of America Special Papers 58: 1 - 226. https: // doi. org / 10.1130 / SPE 58"]} |
format |
Text |
author |
Kröger, Björn Pohle, Alexander |
author_facet |
Kröger, Björn Pohle, Alexander |
author_sort |
Kröger, Björn |
title |
Catoraphiceras undetermined |
title_short |
Catoraphiceras undetermined |
title_full |
Catoraphiceras undetermined |
title_fullStr |
Catoraphiceras undetermined |
title_full_unstemmed |
Catoraphiceras undetermined |
title_sort |
catoraphiceras undetermined |
publisher |
Zenodo |
publishDate |
2021 |
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https://dx.doi.org/10.5281/zenodo.5795754 https://zenodo.org/record/5795754 |
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ENVELOPE(20.728,20.728,79.246,79.246) ENVELOPE(16.847,16.847,79.498,79.498) |
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Hinlopenstretet Ny Friesland |
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Hinlopenstretet Ny Friesland |
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Ny Friesland Spitsbergen |
genre_facet |
Ny Friesland Spitsbergen |
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ftdatacite:10.5281/zenodo.5795754 2023-05-15T17:48:31+02:00 Catoraphiceras undetermined Kröger, Björn Pohle, Alexander 2021 https://dx.doi.org/10.5281/zenodo.5795754 https://zenodo.org/record/5795754 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 https://dx.doi.org/10.5281/zenodo.5793452 https://dx.doi.org/10.5281/zenodo.5793522 https://dx.doi.org/10.5281/zenodo.5793532 http://zoobank.org/071EAD63-05ED-4D6C-AC45-8719E6D79E0B https://dx.doi.org/10.5281/zenodo.5795755 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 Cyptendoceratidae Catoraphiceras Catoraphiceras undetermined Taxonomic treatment article-journal Text ScholarlyArticle 2021 ftdatacite https://doi.org/10.5281/zenodo.5795754 https://doi.org/10.5852/ejt.2021.783.1601 https://doi.org/10.5281/zenodo.5793452 https://doi.org/10.5281/zenodo.5793522 https://doi.org/10.5281/zenodo.5793532 https://doi.org/10.5281/zenodo.5795755 2022-02-08T18:05:53Z Catoraphiceras sp. Figs 10A, 32A, 36D Material examined Specimen FMNH-P30425 from Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, bed PO 131, 128 m above base of Olenidsletta Member, V 2b trilobite zone, Blackhillsian, Floian. Description The specimen is a 20 mm long orthoconic fragment of a phragmocone with a ca 3 mm long basal part of the body chamber. The conch cross section is slightly elliptically depressed with a width of 9.5–10.8 mm and a height of 8.7–9.2 mm (rW = 1.13; angle of expansion of conch height 9°). The ornamentation consists of widely rounded annulations that form a shallow sinus at the prosiphuncular side of the conch and have a distance of ca 3 mm and an amplitude of ca 0.5 mm; the valley and ridges of the annulations are widely rounded. Fine details of the conch surface, which potentially exist, such as growth lines or striae, are not preserved. Roughly one annulation occurs per one chamber. The chambers have a distance of 3–3.5 mm (ca three chambers occur at a distance similar to conch height, rCL = 0.33). The siphuncle is nearly marginal and has a diameter of 3.7 at the adapical end, and 3.9 mm at the adoral end (0.42 of conch height). The connecting ring is thick and consists of slightly concave segments. The shape and length of the septal necks is difficult to interpret because of the poor preservation of the specimen, but they appear to be short orthochoanitic. No cameral or endosiphuncular deposits occur. Remarks This is an annulated orthocone with a large siphuncle, larger than the range given for Catoraphiceras in the diagnosis of Hook & Flower (1977). The assignment of the fragment to Catoraphiceras is justified because all other characters are in agreement with the diagnosis of this genus and there is no other annulated orthocone with a marginal, empty siphuncle with slightly concave segments and short septal necks. Among the species of Catoraphiceras with depressed conch cross section C . colon (White, 1875) and C . resseri Ulrich et al ., 1944 are most similar to specimen FMNH-P30425; the former mainly differs in having an annulation of only 2 annuli per distance similar to corresponding conch height, the latter differs in having a smaller siphuncle with rSD = 0.35. The siphuncle of Catoraphiceras sp. is also larger than the siphuncle of C . ibexense Hook & Flower, 1977 (rSD = 0.24). The single, relatively poorly preserved fragment available from the Olenidsletta Member, however, does not allow for the erection of a new species. The erection of a new species based on this fragmentary specimen is also not possible, because several species are known to contain endosiphuncular deposits, which may or may not exist in more apical, non-preserved, portions of specimen FMNH-P30425. : 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 page 46, DOI: 10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422 : {"references": ["Hook S. C. & Flower R. H. 1977. Late Canadian (Zones J, K) cephalopod faunas from southwestern United States. New Mexico Bureau of Mines and Mineral Resources, Memoir 32: 1 - 102.", "Ulrich E. O., Foerste A. F., Miller A. K. & Unklesbay A. G. 1944. Ozarkian and Canadian cephalopods. Part III: Longicones and summary. Geological Society of America Special Papers 58: 1 - 226. https: // doi. org / 10.1130 / SPE 58"]} Text Ny Friesland Spitsbergen DataCite Metadata Store (German National Library of Science and Technology) Hinlopenstretet ENVELOPE(20.728,20.728,79.246,79.246) Ny Friesland ENVELOPE(16.847,16.847,79.498,79.498) |