Matches in SemOpenAlex for { <https://semopenalex.org/work/W4284892786> ?p ?o ?g. }
- W4284892786 endingPage "3202.e5" @default.
- W4284892786 startingPage "3195" @default.
- W4284892786 abstract "•Meraxes, a new, giant predatory dinosaur from Patagonia had short arms like T. rex •Meraxes is the most complete carcharodontosaurid yet from the Southern Hemisphere •It documents peak diversity of carcharodontosaurids just before they went extinct •Meraxes documents convergent evolution of short arms among megapredatory theropods. Giant carnivorous dinosaurs such as Tyrannosaurus rex and abelisaurids are characterized by highly reduced forelimbs that stand in contrast to their huge dimensions, massive skulls, and obligate bipedalism. 1 Osborn H.F. Tyrannosaurus, Upper Cretaceous carnivorous dinosaur (second communication). Bull. Am. Mus. Nat. Hist. 1906; 22: 281-296 Google Scholar ,2 Bonaparte J.F. Novas F.E. Coria R.A. Carnotaurus sastrei Bonaparte, the horned, lightly built, carnosaur from the middle Cretaceous of Patagonia. Contrib. Sci. (Los Angel.). 1990; 416: 1-42 Crossref Google Scholar Another group that follows this pattern, yet is still poorly known, is the Carcharodontosauridae: dominant predators that inhabited most continents during the Early Cretaceous 3 Stovall J.W. Langston W. Acrocanthosaurus atokensis, a new genus and species of Lower Cretaceous Theropoda from Oklahoma. Am. Midl. Nat. 1950; 43: 696-728 Crossref Google Scholar , 4 Ortega F. Escaso F. Sanz J.L. A bizarre, humped Carcharodontosauria (Theropoda) from the Lower Cretaceous of Spain. Nature. 2010; 467: 203-206https://doi.org/10.1038/nature09181 Crossref PubMed Scopus (94) Google Scholar , 5 Coria R.A. Currie P.J. Ortega F. Baiano M.A. An Early Cretaceous, medium-sized carcharodontosaurid theropod (Dinosauria, Saurischia) from the Mulichinco Formation (upper Valanginian), Neuquén Province, Patagonia, Argentina. Cretac. Res. 2020; 111: 104319https://doi.org/10.1016/j.cretres.2019.104319 Crossref Scopus (13) Google Scholar and reached their largest sizes in Aptian-Cenomanian times. 6 Coria R.A. Salgado L. A new giant carnivorous dinosaur from the Cretaceous of Patagonia. Nature. 1995; 377: 224-226 Crossref Scopus (158) Google Scholar , 7 Sereno P.C. Dutheil D.B. Iarochene M. Larsson H.C. Lyon G.H. Magwene P.M. Sidor C.A. Varrichio D.J. Wilson J.A. Predatory dinosaurs from the Sahara and Late Cretaceous faunal differentiation. Science. 1996; 272: 986-991 Crossref PubMed Scopus (351) Google Scholar , 8 Novas F.E. de Valais S. Vickers Rich P. Rich T. A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids. Naturwissenschaften. 2005; 92: 226-230https://doi.org/10.1007/s00114-005-0623-3 Crossref PubMed Scopus (105) Google Scholar , 9 Coria R.A. Currie P.J. A new carcharodontosaurid (Dinosauria, Theropoda) from the Upper Cretaceous of Argentina. Geodiversitas. 2006; 28: 71-118 Google Scholar , 10 Motta M. Aranciaga Rolando A.M. Rozadilla S. Agnolín F.E. Chimento N.R. Brissón Egli F. Novas F.E. New theropod fauna from the Upper Cretaceous (Huincul Formation) of northwestern Patagonia, Argentina. Bull. N. M. Mus. Nat. Hist. Sci. 2016; 71: 231-253 Google Scholar Despite many discoveries over the last three decades, aspects of their anatomy, especially with regard to the skull, forearm, and feet, remain poorly known. Here we report a new carcharodontosaurid, Meraxes gigas, gen. et sp. nov., based on a specimen recovered from the Upper Cretaceous Huincul Formation of northern Patagonia, Argentina. Phylogenetic analysis places Meraxes among derived Carcharodontosauridae, in a clade with other massive South American species. Meraxes preserves novel anatomical information for derived carcharodontosaurids, including an almost complete forelimb that provides evidence for convergent allometric trends in forelimb reduction among three lineages of large-bodied, megapredatory non-avian theropods, including a remarkable degree of parallelism between the latest-diverging tyrannosaurids and carcharodontosaurids. This trend, coupled with a likely lower bound on forelimb reduction, hypothesized to be about 0.4 forelimb/femur length, combined to produce this short-armed pattern in theropods. The almost complete cranium of Meraxes permits new estimates of skull length in Giganotosaurus, which is among the longest for theropods. Meraxes also provides further evidence that carchardontosaurids reached peak diversity shortly before their extinction with high rates of trait evolution in facial ornamentation possibly linked to a social signaling role. Giant carnivorous dinosaurs such as Tyrannosaurus rex and abelisaurids are characterized by highly reduced forelimbs that stand in contrast to their huge dimensions, massive skulls, and obligate bipedalism. 1 Osborn H.F. Tyrannosaurus, Upper Cretaceous carnivorous dinosaur (second communication). Bull. Am. Mus. Nat. Hist. 1906; 22: 281-296 Google Scholar ,2 Bonaparte J.F. Novas F.E. Coria R.A. Carnotaurus sastrei Bonaparte, the horned, lightly built, carnosaur from the middle Cretaceous of Patagonia. Contrib. Sci. (Los Angel.). 1990; 416: 1-42 Crossref Google Scholar Another group that follows this pattern, yet is still poorly known, is the Carcharodontosauridae: dominant predators that inhabited most continents during the Early Cretaceous 3 Stovall J.W. Langston W. Acrocanthosaurus atokensis, a new genus and species of Lower Cretaceous Theropoda from Oklahoma. Am. Midl. Nat. 1950; 43: 696-728 Crossref Google Scholar , 4 Ortega F. Escaso F. Sanz J.L. A bizarre, humped Carcharodontosauria (Theropoda) from the Lower Cretaceous of Spain. Nature. 2010; 467: 203-206https://doi.org/10.1038/nature09181 Crossref PubMed Scopus (94) Google Scholar , 5 Coria R.A. Currie P.J. Ortega F. Baiano M.A. An Early Cretaceous, medium-sized carcharodontosaurid theropod (Dinosauria, Saurischia) from the Mulichinco Formation (upper Valanginian), Neuquén Province, Patagonia, Argentina. Cretac. Res. 2020; 111: 104319https://doi.org/10.1016/j.cretres.2019.104319 Crossref Scopus (13) Google Scholar and reached their largest sizes in Aptian-Cenomanian times. 6 Coria R.A. Salgado L. A new giant carnivorous dinosaur from the Cretaceous of Patagonia. Nature. 1995; 377: 224-226 Crossref Scopus (158) Google Scholar , 7 Sereno P.C. Dutheil D.B. Iarochene M. Larsson H.C. Lyon G.H. Magwene P.M. Sidor C.A. Varrichio D.J. Wilson J.A. Predatory dinosaurs from the Sahara and Late Cretaceous faunal differentiation. Science. 1996; 272: 986-991 Crossref PubMed Scopus (351) Google Scholar , 8 Novas F.E. de Valais S. Vickers Rich P. Rich T. A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids. Naturwissenschaften. 2005; 92: 226-230https://doi.org/10.1007/s00114-005-0623-3 Crossref PubMed Scopus (105) Google Scholar , 9 Coria R.A. Currie P.J. A new carcharodontosaurid (Dinosauria, Theropoda) from the Upper Cretaceous of Argentina. Geodiversitas. 2006; 28: 71-118 Google Scholar , 10 Motta M. Aranciaga Rolando A.M. Rozadilla S. Agnolín F.E. Chimento N.R. Brissón Egli F. Novas F.E. New theropod fauna from the Upper Cretaceous (Huincul Formation) of northwestern Patagonia, Argentina. Bull. N. M. Mus. Nat. Hist. Sci. 2016; 71: 231-253 Google Scholar Despite many discoveries over the last three decades, aspects of their anatomy, especially with regard to the skull, forearm, and feet, remain poorly known. Here we report a new carcharodontosaurid, Meraxes gigas, gen. et sp. nov., based on a specimen recovered from the Upper Cretaceous Huincul Formation of northern Patagonia, Argentina. Phylogenetic analysis places Meraxes among derived Carcharodontosauridae, in a clade with other massive South American species. Meraxes preserves novel anatomical information for derived carcharodontosaurids, including an almost complete forelimb that provides evidence for convergent allometric trends in forelimb reduction among three lineages of large-bodied, megapredatory non-avian theropods, including a remarkable degree of parallelism between the latest-diverging tyrannosaurids and carcharodontosaurids. This trend, coupled with a likely lower bound on forelimb reduction, hypothesized to be about 0.4 forelimb/femur length, combined to produce this short-armed pattern in theropods. The almost complete cranium of Meraxes permits new estimates of skull length in Giganotosaurus, which is among the longest for theropods. Meraxes also provides further evidence that carchardontosaurids reached peak diversity shortly before their extinction with high rates of trait evolution in facial ornamentation possibly linked to a social signaling role." @default.
- W4284892786 created "2022-07-09" @default.
- W4284892786 creator A5006891008 @default.
- W4284892786 creator A5011924850 @default.
- W4284892786 creator A5017661566 @default.
- W4284892786 creator A5027629594 @default.
- W4284892786 creator A5054763019 @default.
- W4284892786 creator A5074525991 @default.
- W4284892786 creator A5074895785 @default.
- W4284892786 creator A5087209869 @default.
- W4284892786 creator A5088690007 @default.
- W4284892786 creator A5091092217 @default.
- W4284892786 date "2022-07-01" @default.
- W4284892786 modified "2023-10-13" @default.
- W4284892786 title "New giant carnivorous dinosaur reveals convergent evolutionary trends in theropod arm reduction" @default.
- W4284892786 cites W1555682551 @default.
- W4284892786 cites W1836639425 @default.
- W4284892786 cites W1938184260 @default.
- W4284892786 cites W1971975510 @default.
- W4284892786 cites W1988747583 @default.
- W4284892786 cites W2003789729 @default.
- W4284892786 cites W2005919148 @default.
- W4284892786 cites W2009733453 @default.
- W4284892786 cites W2013182835 @default.
- W4284892786 cites W2016328117 @default.
- W4284892786 cites W2016691632 @default.
- W4284892786 cites W2028846588 @default.
- W4284892786 cites W2041901782 @default.
- W4284892786 cites W2045125382 @default.
- W4284892786 cites W2052700727 @default.
- W4284892786 cites W2059533446 @default.
- W4284892786 cites W2066261007 @default.
- W4284892786 cites W2093577344 @default.
- W4284892786 cites W2099020314 @default.
- W4284892786 cites W2114010932 @default.
- W4284892786 cites W2126252810 @default.
- W4284892786 cites W2136696666 @default.
- W4284892786 cites W2167241647 @default.
- W4284892786 cites W2170850874 @default.
- W4284892786 cites W2173811531 @default.
- W4284892786 cites W2180582365 @default.
- W4284892786 cites W2330869943 @default.
- W4284892786 cites W2342577284 @default.
- W4284892786 cites W2464945919 @default.
- W4284892786 cites W2526288514 @default.
- W4284892786 cites W2531072362 @default.
- W4284892786 cites W2897595804 @default.
- W4284892786 cites W2979850746 @default.
- W4284892786 cites W2989622432 @default.
- W4284892786 cites W3005192185 @default.
- W4284892786 cites W3019720657 @default.
- W4284892786 cites W3024770064 @default.
- W4284892786 cites W3036451325 @default.
- W4284892786 cites W3041085282 @default.
- W4284892786 cites W3212990339 @default.
- W4284892786 doi "https://doi.org/10.1016/j.cub.2022.05.057" @default.
- W4284892786 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35803271" @default.
- W4284892786 hasPublicationYear "2022" @default.
- W4284892786 type Work @default.
- W4284892786 citedByCount "6" @default.
- W4284892786 countsByYear W42848927862022 @default.
- W4284892786 countsByYear W42848927862023 @default.
- W4284892786 crossrefType "journal-article" @default.
- W4284892786 hasAuthorship W4284892786A5006891008 @default.
- W4284892786 hasAuthorship W4284892786A5011924850 @default.
- W4284892786 hasAuthorship W4284892786A5017661566 @default.
- W4284892786 hasAuthorship W4284892786A5027629594 @default.
- W4284892786 hasAuthorship W4284892786A5054763019 @default.
- W4284892786 hasAuthorship W4284892786A5074525991 @default.
- W4284892786 hasAuthorship W4284892786A5074895785 @default.
- W4284892786 hasAuthorship W4284892786A5087209869 @default.
- W4284892786 hasAuthorship W4284892786A5088690007 @default.
- W4284892786 hasAuthorship W4284892786A5091092217 @default.
- W4284892786 hasBestOaLocation W42848927861 @default.
- W4284892786 hasConcept C104317684 @default.
- W4284892786 hasConcept C151730666 @default.
- W4284892786 hasConcept C2988562018 @default.
- W4284892786 hasConcept C54355233 @default.
- W4284892786 hasConcept C62142553 @default.
- W4284892786 hasConcept C78458016 @default.
- W4284892786 hasConcept C86803240 @default.
- W4284892786 hasConcept C90132467 @default.
- W4284892786 hasConcept C90856448 @default.
- W4284892786 hasConceptScore W4284892786C104317684 @default.
- W4284892786 hasConceptScore W4284892786C151730666 @default.
- W4284892786 hasConceptScore W4284892786C2988562018 @default.
- W4284892786 hasConceptScore W4284892786C54355233 @default.
- W4284892786 hasConceptScore W4284892786C62142553 @default.
- W4284892786 hasConceptScore W4284892786C78458016 @default.
- W4284892786 hasConceptScore W4284892786C86803240 @default.
- W4284892786 hasConceptScore W4284892786C90132467 @default.
- W4284892786 hasConceptScore W4284892786C90856448 @default.
- W4284892786 hasIssue "14" @default.
- W4284892786 hasLocation W42848927861 @default.
- W4284892786 hasLocation W42848927862 @default.
- W4284892786 hasOpenAccess W4284892786 @default.
- W4284892786 hasPrimaryLocation W42848927861 @default.
- W4284892786 hasRelatedWork W2009951478 @default.