Euhelopodidae is a family of sauropoddinosaurs of disputed membership and affinities, which contains Euhelopus and its close relatives. Most proposed euhelopodids are from East Asia.
Euhelopodidae was first recognized by Carl Wiman in 1929, under the name Helopodidae, as Euhelopus was originally named Helopus.[1] However, the name had already been proposed for a bird, so in 1956 Alfred Sherwood Romer proposed the name Euhelopus and Euhelopodinae as replacements; Romer classified Euhelopodinae as a subfamily of Brachiosauridae, in which he also included Camarasaurinae and Cetiosaurinae, rather than as a family of its own. In addition to Euhelopus itself, Romer included Chiayusaurus, Omeisaurus, and Tienshanosaurus in Euhelopodinae.[2]
The taxonomic content of Euhelopodidae is uncertain, as a result of the unstable position of Euhelopus itself.[3] Some studies have concluded that Euhelopus is a non-neosauropod closely related to Mamenchisaurus, which would make Euhelopodidae equivalent to Mamenchisauridae. Other studies have interpreted Euhelopus as neosauropod united with titanosaurs in Somphospondyli. A joint study by Jeffrey Wilson and Paul Upchurch, who had previously taken opposite sides in the debate, concluded that Euhelopus was closely related to titanosaurs.[4] However, the lack of research on Mamenchisaurus-like taxa has hindered proper testing of this hypothesis, and there are several similarities between Euhelopus and Mamenchisaurus-like taxa that have not been taken into account in most analyses.[5]
Michael D'Emic (2012) formulated the first phylogenetic definition of Euhelopodidae, defining it as the clade containing "neosauropods more closely related to Euhelopus zdanskyi than to Neuquensaurus australis". Below is a cladogram presenting the cladistic hypothesis of Euhelopodidae proposed by D'Emic.
In their 2021 description of Silutitan, Wang et al. recovered it as a derived euhelopodid, as the sister taxon to Euhelopus. The results of their phylogenetic analysis, which included several other euhelopodid taxa, are shown in the cladogram below:[6]
^Wiman, Carl (1929). "Die Kreide-Dinosaurier aus Shantung". Palaeontologia Sinica. 6 (1): 85.
^Romer, A. S. (1956), Osteology of the Reptiles, Chicago: University of Chicago Press, pp. 1–772
^D'Emic, Michael D. (2012), "The early evolution of titanosauriform sauropod dinosaurs" (PDF), Zoological Journal of the Linnean Society, 166 (3): 624–671, doi:10.1111/j.1096-3642.2012.00853.x
^Wilson, Jeffrey A.; Upchurch, Paul (2009). "Redescription and reassessment of the phylogenetic affinities of Euhelopus zdanskyi (Dinosauria: Sauropoda) from the early cretaceous of China". Journal of Systematic Palaeontology. 7 (2): 199–239. doi:10.1017/S1477201908002691. eISSN 1478-0941. ISSN 1477-2019. S2CID 84505064.
^Moore, Andrew J.; Upchurch, Paul; Barrett, Paul M.; Clark, James M.; Xu, Xing (2020-05-28). "Osteology of Klamelisaurus gobiensis (Dinosauria, Eusauropoda) and the evolutionary history of Middle–Late Jurassic Chinese sauropods". Journal of Systematic Palaeontology. 18 (16): 1299–1393. doi:10.1080/14772019.2020.1759706. eISSN 1478-0941. ISSN 1477-2019. S2CID 219749618.
^Wang X, Bandeira KL, Qiu R, Jiang S, Cheng X, Ma Y, Kellner AW (2021). "The first dinosaurs from the Early Cretaceous Hami Pterosaur Fauna, China". Scientific Reports. 11 (1): Article number 14962. Bibcode:2021NatSR..1114962W. doi:10.1038/s41598-021-94273-7. PMC8361124. PMID 34385481.
euhelopodidae, family, sauropod, dinosaurs, disputed, membership, affinities, which, contains, euhelopus, close, relatives, most, proposed, euhelopodids, from, east, asia, euhelopodidstemporal, range, early, cretaceous, late, cretaceous, aptian, maastrichtian,. Euhelopodidae is a family of sauropod dinosaurs of disputed membership and affinities which contains Euhelopus and its close relatives Most proposed euhelopodids are from East Asia EuhelopodidsTemporal range Early Cretaceous Late Cretaceous Aptian Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N Life restoration of a Euhelopus zdanskyi Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Clade Dinosauria Clade Saurischia Clade Sauropodomorpha Clade Sauropoda Clade Macronaria Clade Somphospondyli Family EuhelopodidaeRomer 1956 Type species Euhelopus zdanskyiWiman 1929 Genera Chiayusaurus Daxiatitan Erketu Euhelopus Gannansaurus Gobititan Huabeisaurus Jiangshanosaurus Phuwiangosaurus Qiaowanlong Ruixinia Silutitan Tambatitanis Tangvayosaurus Yongjinglong Yunmenglong Mamenchisauridae Synonyms HelopodidaeWiman 1929 Euhelopodidae was first recognized by Carl Wiman in 1929 under the name Helopodidae as Euhelopus was originally named Helopus 1 However the name had already been proposed for a bird so in 1956 Alfred Sherwood Romer proposed the name Euhelopus and Euhelopodinae as replacements Romer classified Euhelopodinae as a subfamily of Brachiosauridae in which he also included Camarasaurinae and Cetiosaurinae rather than as a family of its own In addition to Euhelopus itself Romer included Chiayusaurus Omeisaurus and Tienshanosaurus in Euhelopodinae 2 The taxonomic content of Euhelopodidae is uncertain as a result of the unstable position of Euhelopus itself 3 Some studies have concluded that Euhelopus is a non neosauropod closely related to Mamenchisaurus which would make Euhelopodidae equivalent to Mamenchisauridae Other studies have interpreted Euhelopus as neosauropod united with titanosaurs in Somphospondyli A joint study by Jeffrey Wilson and Paul Upchurch who had previously taken opposite sides in the debate concluded that Euhelopus was closely related to titanosaurs 4 However the lack of research on Mamenchisaurus like taxa has hindered proper testing of this hypothesis and there are several similarities between Euhelopus and Mamenchisaurus like taxa that have not been taken into account in most analyses 5 Michael D Emic 2012 formulated the first phylogenetic definition of Euhelopodidae defining it as the clade containing neosauropods more closely related to Euhelopus zdanskyi than to Neuquensaurus australis Below is a cladogram presenting the cladistic hypothesis of Euhelopodidae proposed by D Emic Euhelopodidae Qiaowanlong Erketu Euhelopus Daxiatitan Tangvayosaurus Phuwiangosaurus In their 2021 description of Silutitan Wang et al recovered it as a derived euhelopodid as the sister taxon to Euhelopus The results of their phylogenetic analysis which included several other euhelopodid taxa are shown in the cladogram below 6 Huanghetitan Europatitan Tastavinsaurus Euhelopodidae Phuwiangosaurus Tangvayosaurus Qiaowanlong Huanghetitan ruyangensis Ruyangosaurus Yongjinglong Erketu Gobititan Euhelopus Silutitan Padillasaurus TitanosauriaReferences edit Wiman Carl 1929 Die Kreide Dinosaurier aus Shantung Palaeontologia Sinica 6 1 85 Romer A S 1956 Osteology of the Reptiles Chicago University of Chicago Press pp 1 772 D Emic Michael D 2012 The early evolution of titanosauriform sauropod dinosaurs PDF Zoological Journal of the Linnean Society 166 3 624 671 doi 10 1111 j 1096 3642 2012 00853 x Wilson Jeffrey A Upchurch Paul 2009 Redescription and reassessment of the phylogenetic affinities of Euhelopus zdanskyi Dinosauria Sauropoda from the early cretaceous of China Journal of Systematic Palaeontology 7 2 199 239 doi 10 1017 S1477201908002691 eISSN 1478 0941 ISSN 1477 2019 S2CID 84505064 Moore Andrew J Upchurch Paul Barrett Paul M Clark James M Xu Xing 2020 05 28 Osteology of Klamelisaurus gobiensis Dinosauria Eusauropoda and the evolutionary history of Middle Late Jurassic Chinese sauropods Journal of Systematic Palaeontology 18 16 1299 1393 doi 10 1080 14772019 2020 1759706 eISSN 1478 0941 ISSN 1477 2019 S2CID 219749618 Wang X Bandeira KL Qiu R Jiang S Cheng X Ma Y Kellner AW 2021 The first dinosaurs from the Early Cretaceous Hami Pterosaur Fauna China Scientific Reports 11 1 Article number 14962 Bibcode 2021NatSR 1114962W doi 10 1038 s41598 021 94273 7 PMC 8361124 PMID 34385481 nbsp Dinosaurs portal nbsp This Sauropodomorph related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Euhelopodidae amp oldid 1197375157, wikipedia, wiki, book, books, library,
