First occurrence of a frog-like batrachian (Amphibia) in the Late Triassic Fleming Fjord Group, central
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First occurrence of a frog-like batrachian (Amphibia) in the Late Triassic Fleming Fjord Group, central. / Jésus, Valerian J. P.; Mateus, Octávio; Milan, Jesper; Clemmensen, Lars B.
I: Bulletin of the Geological Society of Denmark, Bind 70, 2022, s. 117-130.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - First occurrence of a frog-like batrachian (Amphibia) in the Late Triassic Fleming Fjord Group, central
AU - Jésus, Valerian J. P.
AU - Mateus, Octávio
AU - Milan, Jesper
AU - Clemmensen, Lars B.
PY - 2022
Y1 - 2022
N2 - During the Triassic, Batrachia diverged into ancestors of frogs (Salientia) and salamanders (Caudata). Fossils of Triassic batrachians are rare and found only in a few outcrops, such as the Middle Sakamena Formation of Madagascar (Induan). Only three Triassic taxa have been described, the two early frogs Triadobatrachus and Czatkiobatrachus and the early salamander Triassurus. Here we describe a right ilium, collected in 1991, attributed to the first batrachian from the Late Triassic Carlsberg Fjord Member (orsted Dal Formation, Fleming Fjord Group) in the Jameson Land Basin, located in central East Greenland. The fossil specimen only displays the proximal part of a right ilium, missing its shaft. After a thorough comparison with several clades (lizards, temnospondyls, salamanders and frogs), we consider the specimen as a lissamphibian sharing feature with salientians and anurans: squarish acetabular region, deeply concave acetabular surface, laterally projecting acetabular rim, flat mesial surface. It is the youngest Triassic specimen of Batrachia to date and one of the northernmost of the Late Triassic.
AB - During the Triassic, Batrachia diverged into ancestors of frogs (Salientia) and salamanders (Caudata). Fossils of Triassic batrachians are rare and found only in a few outcrops, such as the Middle Sakamena Formation of Madagascar (Induan). Only three Triassic taxa have been described, the two early frogs Triadobatrachus and Czatkiobatrachus and the early salamander Triassurus. Here we describe a right ilium, collected in 1991, attributed to the first batrachian from the Late Triassic Carlsberg Fjord Member (orsted Dal Formation, Fleming Fjord Group) in the Jameson Land Basin, located in central East Greenland. The fossil specimen only displays the proximal part of a right ilium, missing its shaft. After a thorough comparison with several clades (lizards, temnospondyls, salamanders and frogs), we consider the specimen as a lissamphibian sharing feature with salientians and anurans: squarish acetabular region, deeply concave acetabular surface, laterally projecting acetabular rim, flat mesial surface. It is the youngest Triassic specimen of Batrachia to date and one of the northernmost of the Late Triassic.
KW - Lissamphibia
KW - frogs
KW - salamanders
KW - ilium
KW - Late Triassic
KW - Fleming Fjord Group
KW - CENTRAL EAST GREENLAND
KW - JAMESON LAND
KW - SAUROPODOMORPH DINOSAUR
KW - POSTCRANIAL SKELETON
KW - HATEG BASIN
KW - TEMNOSPONDYLI
KW - MORPHOLOGY
KW - EVOLUTION
KW - ORIGIN
KW - DISSOROPHOIDEA
U2 - 10.37570/bgsd-2022-70-08
DO - 10.37570/bgsd-2022-70-08
M3 - Journal article
VL - 70
SP - 117
EP - 130
JO - Bulletin of the Geological Society of Denmark
JF - Bulletin of the Geological Society of Denmark
SN - 0011-6297
ER -
ID: 321832633