Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland
The Late Triassic (Norian) outcrops of the Malmros Klint Formation, Jameson Land (Greenland) have yielded numerous specimens of non-sauropod sauropodomorphs. Relevant fossils were briefly reported in 1994 and were assigned to Plateosaurus trossingensis. However, continuous new findings of early non-...
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ftmdpi:oai:mdpi.com:/1424-2818/13/11/561/ 2023-08-20T04:06:12+02:00 Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland Victor Beccari Octávio Mateus Oliver Wings Jesper Milàn Lars B. Clemmensen agris 2021-11-03 application/pdf https://doi.org/10.3390/d13110561 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/d13110561 https://creativecommons.org/licenses/by/4.0/ Diversity; Volume 13; Issue 11; Pages: 561 sauropodomorph Triassic plateosaurid dinosaur Greenland Text 2021 ftmdpi https://doi.org/10.3390/d13110561 2023-08-01T03:09:15Z The Late Triassic (Norian) outcrops of the Malmros Klint Formation, Jameson Land (Greenland) have yielded numerous specimens of non-sauropod sauropodomorphs. Relevant fossils were briefly reported in 1994 and were assigned to Plateosaurus trossingensis. However, continuous new findings of early non-sauropod sauropodomorphs around the globe facilitate comparisons and allow us to now revise this material. Here, the non-sauropod sauropodomorph Issi saaneq gen. et sp. nov. is described based on two almost complete and articulated skulls. The two skulls represent a middle-stage juvenile and a late-stage juvenile or subadult. Issi saaneq differs from all other sauropodomorphs by several unique traits: (1) a small foramen at the medial surface of the premaxilla; (2) an anteroposteriorly elongated dorsoposterior process of the squamosal; (3) a relatively high quadrate relative to rostrum height; (4) a well-developed posterodorsal process of the articular. These features cannot be explained by taphonomy, ontogeny, or intraspecific variation. Issi saaneq shows affinities to Brazilian plateosaurids and the European Plateosaurus, being recovered as the sister clade of the latter in our phylogenetic analysis. It is the northernmost record of a Late Triassic sauropodomorph, and a new dinosaur species erected for Greenland. Issi saaneq broadens our knowledge about the evolution of plateosaurid sauropodomorphs. Text East Greenland Greenland MDPI Open Access Publishing Greenland Jameson Land ENVELOPE(-23.500,-23.500,71.167,71.167) Diversity 13 11 561 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
sauropodomorph Triassic plateosaurid dinosaur Greenland |
spellingShingle |
sauropodomorph Triassic plateosaurid dinosaur Greenland Victor Beccari Octávio Mateus Oliver Wings Jesper Milàn Lars B. Clemmensen Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland |
topic_facet |
sauropodomorph Triassic plateosaurid dinosaur Greenland |
description |
The Late Triassic (Norian) outcrops of the Malmros Klint Formation, Jameson Land (Greenland) have yielded numerous specimens of non-sauropod sauropodomorphs. Relevant fossils were briefly reported in 1994 and were assigned to Plateosaurus trossingensis. However, continuous new findings of early non-sauropod sauropodomorphs around the globe facilitate comparisons and allow us to now revise this material. Here, the non-sauropod sauropodomorph Issi saaneq gen. et sp. nov. is described based on two almost complete and articulated skulls. The two skulls represent a middle-stage juvenile and a late-stage juvenile or subadult. Issi saaneq differs from all other sauropodomorphs by several unique traits: (1) a small foramen at the medial surface of the premaxilla; (2) an anteroposteriorly elongated dorsoposterior process of the squamosal; (3) a relatively high quadrate relative to rostrum height; (4) a well-developed posterodorsal process of the articular. These features cannot be explained by taphonomy, ontogeny, or intraspecific variation. Issi saaneq shows affinities to Brazilian plateosaurids and the European Plateosaurus, being recovered as the sister clade of the latter in our phylogenetic analysis. It is the northernmost record of a Late Triassic sauropodomorph, and a new dinosaur species erected for Greenland. Issi saaneq broadens our knowledge about the evolution of plateosaurid sauropodomorphs. |
format |
Text |
author |
Victor Beccari Octávio Mateus Oliver Wings Jesper Milàn Lars B. Clemmensen |
author_facet |
Victor Beccari Octávio Mateus Oliver Wings Jesper Milàn Lars B. Clemmensen |
author_sort |
Victor Beccari |
title |
Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland |
title_short |
Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland |
title_full |
Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland |
title_fullStr |
Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland |
title_full_unstemmed |
Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland |
title_sort |
issi saaneq gen. et sp. nov.—a new sauropodomorph dinosaur from the late triassic (norian) of jameson land, central east greenland |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/d13110561 |
op_coverage |
agris |
long_lat |
ENVELOPE(-23.500,-23.500,71.167,71.167) |
geographic |
Greenland Jameson Land |
geographic_facet |
Greenland Jameson Land |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
Diversity; Volume 13; Issue 11; Pages: 561 |
op_relation |
https://dx.doi.org/10.3390/d13110561 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/d13110561 |
container_title |
Diversity |
container_volume |
13 |
container_issue |
11 |
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561 |
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1774717149081763840 |