Camptonectes (Costicamptonectes) milnelandensis Fursich 1982
Camptonectes (Costicamptonectes) aff. milnelandensis Fürsich, 1982 (Figure 10 H–K) 1982 aff. Camptonectes (Costicamptonectes) milnelandensis sp. nov. —Fürsich, p. 50, figs. 23 C–D, F, G. Material examined. Two poorly preserved right valves. In addition a single external mould with silicone rubber ca...
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ftzenodo:oai:zenodo.org:5228251 2023-06-06T11:53:14+02:00 Camptonectes (Costicamptonectes) milnelandensis Fursich 1982 Hryniewicz, Krzysztof Little, Crispin T. S. Nakrem, Hans Arne 2014-09-02 https://zenodo.org/record/5228251 https://doi.org/10.5281/zenodo.5228251 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/A2311D4D9F03E33F04E6FF3DFC712C53 doi:10.11646/zootaxa.3859.1.1 http://zenodo.org/record/4930112 http://publication.plazi.org/id/5E0865359F19E3250471FFA5FFA82955 doi:10.5281/zenodo.5228099 http://zoobank.org/24FCAAE1-AB7C-4FAD-8698-D0C9F12400EC doi:10.5281/zenodo.5228250 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5228251 https://doi.org/10.5281/zenodo.5228251 oai:zenodo.org:5228251 info:eu-repo/semantics/openAccess Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard, pp. 1-66 in Zootaxa 3859(1) 27 Biodiversity Taxonomy Animalia Mollusca Bivalvia Pectinoida Pectinidae Camptonectes Camptonectes milnelandensis info:eu-repo/semantics/other publication-taxonomictreatment 2014 ftzenodo https://doi.org/10.5281/zenodo.522825110.11646/zootaxa.3859.1.110.5281/zenodo.522809910.5281/zenodo.5228250 2023-04-13T20:53:18Z Camptonectes (Costicamptonectes) aff. milnelandensis Fürsich, 1982 (Figure 10 H–K) 1982 aff. Camptonectes (Costicamptonectes) milnelandensis sp. nov. —Fürsich, p. 50, figs. 23 C–D, F, G. Material examined. Two poorly preserved right valves. In addition a single external mould with silicone rubber cast from the Dorsoplanites bed (PMO 226.604). See Appendix 1 for the list of specimens. Dimensions. 15–30.5 mm in length, 15–28.2 mm in height. See Appendix 2G for details. Description. Shell small to medium sized, very thin, appears to get shorter at later growth stages. Right valve suborbicular, moderately inflated, with small posterior and larger anterior auricle, ventrally delineated by a deep byssal notch. Ctenolium well developed. Antero- and posterodorsal margins subequal, anterodorsal margin slightly concave. Anterior margin slightly more convex than posterior margin, ventral margin evenly rounded. Preserved ornament consists of weak divaricating radial ribs, intersected by weak but dense growth lines. Anterodorsal margin ornamented by ca. 6 subparallel radial ribs. Left valve, musculature and dentition unknown. Remarks. We compare our specimens with C. (Co.) milnelandensis because of its ornament of commarginal growth lines accompanied by divaricate ribs and with additional radial ribs close to the anterodorsal margin. The Svalbard specimens have a slightly higher umbonal angle than comparatively sized specimens of C. (Co.) milnelandensis from Greenland (Fürsich 1982). However, no specimens larger than 18 mm were reported by Fürsich (1982) so we are unable to compare the ontogenetic changes of umbonal angle of specimens from both localities. In addition, the Svalbard material is composed of right valves only. Until more is known about C. (Co.) milnelandensis from both Greenland and Svalbard, we prefer to leave our species in open nomenclature. Occurrence. Camptonectes (Co.) milnelandensis: Upper Callovian–Upper Oxfordian of Milne Land, East Greenland (Fürsich 1982). Camptonectes (Co.) aff. milnelandensis: Seep ... Other/Unknown Material East Greenland Greenland Milne Land Svalbard Zenodo Greenland Milne Land ENVELOPE(-26.750,-26.750,70.683,70.683) Svalbard |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Mollusca Bivalvia Pectinoida Pectinidae Camptonectes Camptonectes milnelandensis |
spellingShingle |
Biodiversity Taxonomy Animalia Mollusca Bivalvia Pectinoida Pectinidae Camptonectes Camptonectes milnelandensis Hryniewicz, Krzysztof Little, Crispin T. S. Nakrem, Hans Arne Camptonectes (Costicamptonectes) milnelandensis Fursich 1982 |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Bivalvia Pectinoida Pectinidae Camptonectes Camptonectes milnelandensis |
description |
Camptonectes (Costicamptonectes) aff. milnelandensis Fürsich, 1982 (Figure 10 H–K) 1982 aff. Camptonectes (Costicamptonectes) milnelandensis sp. nov. —Fürsich, p. 50, figs. 23 C–D, F, G. Material examined. Two poorly preserved right valves. In addition a single external mould with silicone rubber cast from the Dorsoplanites bed (PMO 226.604). See Appendix 1 for the list of specimens. Dimensions. 15–30.5 mm in length, 15–28.2 mm in height. See Appendix 2G for details. Description. Shell small to medium sized, very thin, appears to get shorter at later growth stages. Right valve suborbicular, moderately inflated, with small posterior and larger anterior auricle, ventrally delineated by a deep byssal notch. Ctenolium well developed. Antero- and posterodorsal margins subequal, anterodorsal margin slightly concave. Anterior margin slightly more convex than posterior margin, ventral margin evenly rounded. Preserved ornament consists of weak divaricating radial ribs, intersected by weak but dense growth lines. Anterodorsal margin ornamented by ca. 6 subparallel radial ribs. Left valve, musculature and dentition unknown. Remarks. We compare our specimens with C. (Co.) milnelandensis because of its ornament of commarginal growth lines accompanied by divaricate ribs and with additional radial ribs close to the anterodorsal margin. The Svalbard specimens have a slightly higher umbonal angle than comparatively sized specimens of C. (Co.) milnelandensis from Greenland (Fürsich 1982). However, no specimens larger than 18 mm were reported by Fürsich (1982) so we are unable to compare the ontogenetic changes of umbonal angle of specimens from both localities. In addition, the Svalbard material is composed of right valves only. Until more is known about C. (Co.) milnelandensis from both Greenland and Svalbard, we prefer to leave our species in open nomenclature. Occurrence. Camptonectes (Co.) milnelandensis: Upper Callovian–Upper Oxfordian of Milne Land, East Greenland (Fürsich 1982). Camptonectes (Co.) aff. milnelandensis: Seep ... |
format |
Other/Unknown Material |
author |
Hryniewicz, Krzysztof Little, Crispin T. S. Nakrem, Hans Arne |
author_facet |
Hryniewicz, Krzysztof Little, Crispin T. S. Nakrem, Hans Arne |
author_sort |
Hryniewicz, Krzysztof |
title |
Camptonectes (Costicamptonectes) milnelandensis Fursich 1982 |
title_short |
Camptonectes (Costicamptonectes) milnelandensis Fursich 1982 |
title_full |
Camptonectes (Costicamptonectes) milnelandensis Fursich 1982 |
title_fullStr |
Camptonectes (Costicamptonectes) milnelandensis Fursich 1982 |
title_full_unstemmed |
Camptonectes (Costicamptonectes) milnelandensis Fursich 1982 |
title_sort |
camptonectes (costicamptonectes) milnelandensis fursich 1982 |
publishDate |
2014 |
url |
https://zenodo.org/record/5228251 https://doi.org/10.5281/zenodo.5228251 |
long_lat |
ENVELOPE(-26.750,-26.750,70.683,70.683) |
geographic |
Greenland Milne Land Svalbard |
geographic_facet |
Greenland Milne Land Svalbard |
genre |
East Greenland Greenland Milne Land Svalbard |
genre_facet |
East Greenland Greenland Milne Land Svalbard |
op_source |
Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard, pp. 1-66 in Zootaxa 3859(1) 27 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/A2311D4D9F03E33F04E6FF3DFC712C53 doi:10.11646/zootaxa.3859.1.1 http://zenodo.org/record/4930112 http://publication.plazi.org/id/5E0865359F19E3250471FFA5FFA82955 doi:10.5281/zenodo.5228099 http://zoobank.org/24FCAAE1-AB7C-4FAD-8698-D0C9F12400EC doi:10.5281/zenodo.5228250 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5228251 https://doi.org/10.5281/zenodo.5228251 oai:zenodo.org:5228251 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.522825110.11646/zootaxa.3859.1.110.5281/zenodo.522809910.5281/zenodo.5228250 |
_version_ |
1767959373121847296 |