Pseudotrapezium groenlandicum Spath 1936
Pseudotrapezium aff. groenlandicum Spath, 1936 (Figure 16 H–P) 1936 aff. Pseudotrapezium groenlandicum sp. nov. —Spath, p. 125, pl. 49, fig. 7a–c. ? 1982 aff. Hartwellia (Hartwellia) groenlandica (Spath) —Fürsich, p. 89. 2011 Arcticid—Hammer et al., fig. 7m, tab. 2. Material examined. 820 specimens,...
Main Authors: | , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
2014
|
Subjects: | |
Online Access: | https://zenodo.org/record/5228265 https://doi.org/10.5281/zenodo.5228265 |
id |
ftzenodo:oai:zenodo.org:5228265 |
---|---|
record_format |
openpolar |
spelling |
ftzenodo:oai:zenodo.org:5228265 2023-05-15T16:03:56+02:00 Pseudotrapezium groenlandicum Spath 1936 Hryniewicz, Krzysztof Little, Crispin T. S. Nakrem, Hans Arne 2014-09-02 https://zenodo.org/record/5228265 https://doi.org/10.5281/zenodo.5228265 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/A2311D4D9F31E30F04E6FD9FFDFD2F57 doi:10.11646/zootaxa.3859.1.1 http://zenodo.org/record/4930112 http://publication.plazi.org/id/5E0865359F19E3250471FFA5FFA82955 doi:10.5281/zenodo.5228109 doi:10.5281/zenodo.4930138 http://zoobank.org/24FCAAE1-AB7C-4FAD-8698-D0C9F12400EC doi:10.5281/zenodo.5228264 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5228265 https://doi.org/10.5281/zenodo.5228265 oai:zenodo.org:5228265 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) 41-43 Biodiversity Taxonomy Animalia Mollusca Bivalvia Venerida Arcticidae Pseudotrapezium Pseudotrapezium groenlandicum info:eu-repo/semantics/other publication-taxonomictreatment 2014 ftzenodo https://doi.org/10.5281/zenodo.522826510.11646/zootaxa.3859.1.110.5281/zenodo.522810910.5281/zenodo.493013810.5281/zenodo.5228264 2023-03-10T15:09:35Z Pseudotrapezium aff. groenlandicum Spath, 1936 (Figure 16 H–P) 1936 aff. Pseudotrapezium groenlandicum sp. nov. —Spath, p. 125, pl. 49, fig. 7a–c. ? 1982 aff. Hartwellia (Hartwellia) groenlandica (Spath) —Fürsich, p. 89. 2011 Arcticid—Hammer et al., fig. 7m, tab. 2. Material examined. 820 specimens, mostly articulated or semi-articulated shells and internal moulds. See Appendix 1 for list of specimens. Dimensions. 12–15 mm in length, 9.8–11 mm in height, 8–10 mm in width. See Figure 18 A–D and Appendix 2L for details. Description. Small, moderately inflated with very thin shell. Beaks prosogyrate, very strongly incurved. Lunule moderately deep. Anterior margin projecting, arcuate, passing into broadly arched ventral margin. Posterior area with two carinae, posteroventral extremity slightly rostrate where intersected by first carina, passing into truncated oblique posterior margin. Second carina weak, parallel to the posterodorsal margin. Posterodorsal margin straight. External ornament composed of very weak commarginal growth lines. Hinge plate large and thick; lateral tooth AI developed, separated from 1; 3a absent. 1 and 3b separated, diverging from umbo; 1 strong and vertical; 3b thick, anterodorsally inclined. Angle between 1 and 3b ca. 70°. Left valve dentition unknown. Anterior adductor muscle scar weak, elongated along pallial line, around twice as long as wide, not detached. Posterior adductor muscle scar weak, rounded. Pallial line weak, entire. Remarks. We compare our specimens with Pseudotrapezium groenlandicum Spath, 1936, from Milne Land, East Greenland (Spath 1936) due to their thick hinge plate, similar cardinal dentition and external shape. However, the Svalbard specimens are much smaller and more thin shelled than the Greenland material, so we are not entirely sure they represent the same species and leave them in open nomenclature. Fürsich (1982) moved P. groenlandicum into the genus Hartwellia Kitchin, 1926, and redescribed it as Hartwellia (H.) groenlandica. Hartwellia was considered by Cox ... 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 Venerida Arcticidae Pseudotrapezium Pseudotrapezium groenlandicum |
spellingShingle |
Biodiversity Taxonomy Animalia Mollusca Bivalvia Venerida Arcticidae Pseudotrapezium Pseudotrapezium groenlandicum Hryniewicz, Krzysztof Little, Crispin T. S. Nakrem, Hans Arne Pseudotrapezium groenlandicum Spath 1936 |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Bivalvia Venerida Arcticidae Pseudotrapezium Pseudotrapezium groenlandicum |
description |
Pseudotrapezium aff. groenlandicum Spath, 1936 (Figure 16 H–P) 1936 aff. Pseudotrapezium groenlandicum sp. nov. —Spath, p. 125, pl. 49, fig. 7a–c. ? 1982 aff. Hartwellia (Hartwellia) groenlandica (Spath) —Fürsich, p. 89. 2011 Arcticid—Hammer et al., fig. 7m, tab. 2. Material examined. 820 specimens, mostly articulated or semi-articulated shells and internal moulds. See Appendix 1 for list of specimens. Dimensions. 12–15 mm in length, 9.8–11 mm in height, 8–10 mm in width. See Figure 18 A–D and Appendix 2L for details. Description. Small, moderately inflated with very thin shell. Beaks prosogyrate, very strongly incurved. Lunule moderately deep. Anterior margin projecting, arcuate, passing into broadly arched ventral margin. Posterior area with two carinae, posteroventral extremity slightly rostrate where intersected by first carina, passing into truncated oblique posterior margin. Second carina weak, parallel to the posterodorsal margin. Posterodorsal margin straight. External ornament composed of very weak commarginal growth lines. Hinge plate large and thick; lateral tooth AI developed, separated from 1; 3a absent. 1 and 3b separated, diverging from umbo; 1 strong and vertical; 3b thick, anterodorsally inclined. Angle between 1 and 3b ca. 70°. Left valve dentition unknown. Anterior adductor muscle scar weak, elongated along pallial line, around twice as long as wide, not detached. Posterior adductor muscle scar weak, rounded. Pallial line weak, entire. Remarks. We compare our specimens with Pseudotrapezium groenlandicum Spath, 1936, from Milne Land, East Greenland (Spath 1936) due to their thick hinge plate, similar cardinal dentition and external shape. However, the Svalbard specimens are much smaller and more thin shelled than the Greenland material, so we are not entirely sure they represent the same species and leave them in open nomenclature. Fürsich (1982) moved P. groenlandicum into the genus Hartwellia Kitchin, 1926, and redescribed it as Hartwellia (H.) groenlandica. Hartwellia was considered by Cox ... |
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 |
Pseudotrapezium groenlandicum Spath 1936 |
title_short |
Pseudotrapezium groenlandicum Spath 1936 |
title_full |
Pseudotrapezium groenlandicum Spath 1936 |
title_fullStr |
Pseudotrapezium groenlandicum Spath 1936 |
title_full_unstemmed |
Pseudotrapezium groenlandicum Spath 1936 |
title_sort |
pseudotrapezium groenlandicum spath 1936 |
publishDate |
2014 |
url |
https://zenodo.org/record/5228265 https://doi.org/10.5281/zenodo.5228265 |
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) 41-43 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/A2311D4D9F31E30F04E6FD9FFDFD2F57 doi:10.11646/zootaxa.3859.1.1 http://zenodo.org/record/4930112 http://publication.plazi.org/id/5E0865359F19E3250471FFA5FFA82955 doi:10.5281/zenodo.5228109 doi:10.5281/zenodo.4930138 http://zoobank.org/24FCAAE1-AB7C-4FAD-8698-D0C9F12400EC doi:10.5281/zenodo.5228264 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5228265 https://doi.org/10.5281/zenodo.5228265 oai:zenodo.org:5228265 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.522826510.11646/zootaxa.3859.1.110.5281/zenodo.522810910.5281/zenodo.493013810.5281/zenodo.5228264 |
_version_ |
1766399618683240448 |