Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland †
1
GeoBioTec, Department of Earth Sciences, Faculdade de Ciência e Tecnologia, Universidade Nova de Lisboa, 2829-516 Lisbon, Portugal
2
Museu da Lourinhã, 2530-158 Lourinhã, Portugal
3
SNSB—Bayerische Staatssammlung für Paläontologie und Geologie, 80333 Munich, Germany
4
Natural Sciences Collections (ZNS), Martin Luther University Halle-Wittenberg, 06108 Halle, Germany
5
Geomuseum Faxe, Østsjællands Museum, 4640 Faxe, Denmark
6
Department of Geosciences and Natural Resource Management, University of Copenhagen, 1165 Copenhagen, Denmark
*
Author to whom correspondence should be addressed.
†
urn:lsid:zoobank.org:act:76F3ECA8-8B98-4735-8354-398B53A455EA; urn:lsid:zoobank.org:act:8DF8A871-C8D7-4944-A8A9-338BF82AB5CA; urn:lsid:zoobank.org:pub:8AB4D333-BD8E-40B3-B978-37AD481C20E3.
‡
urn:lsid:zoobank.org:author:CF510830-CFDF-4955-8874-2C09C24A123C (V.B.); urn:lsid:zoobank.org:author:9310955D-ACA9-4090-8699-3BB795F7B067 (O.M.); urn:lsid:zoobank.org:author:00B8FDE4-3E97-47B6-9D60-9BBD260615A6 (O.W.); urn:lsid:zoobank.org:author:76740A35-5E64-413B-A561-EAEEB024F79E (J.M.); urn:lsid:zoobank.org:author:04906BD1-B206-448B-94F1-ABBC6388EB10 (L.B.C.).
Academic Editor: Eric Buffetaut
Diversity 2021, 13(11), 561; https://doi.org/10.3390/d13110561
Received: 29 September 2021
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Revised: 22 October 2021
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Accepted: 29 October 2021
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Published: 3 November 2021
(This article belongs to the Special Issue 2021 Feature Papers by Diversity’s Editorial Board Members)
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.
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Keywords:
sauropodomorph; Triassic; plateosaurid; dinosaur; Greenland
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MDPI and ACS Style
Beccari, V.; Mateus, O.; Wings, O.; Milàn, J.; Clemmensen, L.B. Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland. Diversity 2021, 13, 561. https://doi.org/10.3390/d13110561
AMA Style
Beccari V, Mateus O, Wings O, Milàn J, Clemmensen LB. Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland. Diversity. 2021; 13(11):561. https://doi.org/10.3390/d13110561
Chicago/Turabian StyleBeccari, Victor, Octávio Mateus, Oliver Wings, Jesper Milàn, and Lars B. Clemmensen. 2021. "Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland" Diversity 13, no. 11: 561. https://doi.org/10.3390/d13110561
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