Illustration of the tibia from the E. fortisholotype
AliwaliaEdit
Fossil material now assigned to Eucnemesaurus was once placed in a separate genus and species, Aliwalia rex (the generic name was taken from the Aliwal Park Reserve in the Union of South Africa, where the first remains were found). The fossil evidence of this species was comparably small, with for many years only femoral fragments and a maxilla known, having been sent from South Africa to Austria in 1873 in a shipment with prosauropod bones.[1]
The size of the femur led many palaeontologists to believe (along with the clearly carnivorous maxilla), that Aliwalia was a carnivorous dinosaur of remarkable size for the age in which lived. It would have been comparable to that of the large Jurassic and Cretaceoustheropods, such as Allosaurus, that evolved tens of millions of years after Aliwalia. The original material was believed to bear a strong similarity to the South AmericanHerrerasaurus, so much so that Aliwalia was originally classified in Herrerasauridae by Peter Galton.
However, later re-evaluation of the material has shown that the maxilla assigned to Aliwalia does not, unlike the other material, belong to Eucnemesaurus, as it is clearly from a carnivore. In addition, new material clearly demonstrates this latter genus' sauropodomorph affinities.
SourcesEdit
E. C. N. van Hoepen (1920). "Contributions to the knowledge of the reptiles of the Karroo Formation. 6. Further dinosaurian material in the Transvaal Museum", Annals of the Transvaal Museum7(2): 93-141
Yates, A.M. (2006). "Solving a dinosaurian puzzle: the identity of Aliwalia rex Galton". Historical Biology, 1–31
ReferencesEdit
^Dixon, Dougal (2015). The Complete Illustrated Encyclopedia of Dinosaurs. London: Hermes House.
October 21, 2023
eucnemesaurus, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, november, 20. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Eucnemesaurus news newspapers books scholar JSTOR November 2022 Learn how and when to remove this template message Eucnemesaurus j uː k ˌ n iː m ɪ ˈ s ɔːr e s meaning good tibia lizard for its robust tibiae is a basal sauropodomorph dinosaur genus usually considered to be a synonym of Euskelosaurus Recent study by Yates 2006 however indicates that it is valid and the same animal as putative giant herrerasaurid Aliwalia EucnemesaurusTemporal range Late Triassic 228 Ma PreꞒ Ꞓ O S D C P T J K Pg N Pes of E entaxonisScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClade DinosauriaClade SaurischiaClade SauropodomorphaClade RiojasauridaeGenus EucnemesaurusHoepen 1920Species E fortis Hoepen 1920 E entaxonis McPhee et al 2015SynonymsAliwalia rex Galton 1985Eucnemesaurus was named in 1920 by Egbert Cornelis Nicolaas van Hoepen The type species is Eucnemesaurus fortis The specific name means strong in Latin It is based on holotype TrM 119 a partial skeleton including vertebrae part of a pubis a femur and two tibiae The remains were found by Van Hoepen in the late Carnian early Norian age Upper Triassic Lower Elliot Formation of the Slabberts district Orange Free State South Africa Yates assigned the genus to the new family Riojasauridae with Riojasaurus usually regarded as a melanorosaurid Illustration of the tibia from the E fortis holotypeAliwalia EditFossil material now assigned to Eucnemesaurus was once placed in a separate genus and species Aliwalia rex the generic name was taken from the Aliwal Park Reserve in the Union of South Africa where the first remains were found The fossil evidence of this species was comparably small with for many years only femoral fragments and a maxilla known having been sent from South Africa to Austria in 1873 in a shipment with prosauropod bones 1 The size of the femur led many palaeontologists to believe along with the clearly carnivorous maxilla that Aliwalia was a carnivorous dinosaur of remarkable size for the age in which lived It would have been comparable to that of the large Jurassic and Cretaceous theropods such as Allosaurus that evolved tens of millions of years after Aliwalia The original material was believed to bear a strong similarity to the South American Herrerasaurus so much so that Aliwalia was originally classified in Herrerasauridae by Peter Galton However later re evaluation of the material has shown that the maxilla assigned to Aliwalia does not unlike the other material belong to Eucnemesaurus as it is clearly from a carnivore In addition new material clearly demonstrates this latter genus sauropodomorph affinities Sources EditE C N van Hoepen 1920 Contributions to the knowledge of the reptiles of the Karroo Formation 6 Further dinosaurian material in the Transvaal Museum Annals of the Transvaal Museum 7 2 93 141 Yates A M 2006 Solving a dinosaurian puzzle the identity of Aliwalia rex Galton Historical Biology 1 31References Edit Dixon Dougal 2015 The Complete Illustrated Encyclopedia of Dinosaurs London Hermes House Retrieved from https en wikipedia org w index php title Eucnemesaurus amp oldid 1178944748, wikipedia, wiki, book, books, library,
