气候变化领域集成服务门户(CCPortal): Carcharodontosauridae theropod tooth crowns from the Upper Cretaceous (Bauru Basin) of Brazil: A reassessment of isolated elements and its implications to palaeobiogeography of the group

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DOI	10.1016/j.palaeo.2020.109870
	Carcharodontosauridae theropod tooth crowns from the Upper Cretaceous (Bauru Basin) of Brazil: A reassessment of isolated elements and its implications to palaeobiogeography of the group
	Delcourt R.; Brilhante N.S.; Grillo O.N.; Ghilardi A.M.; Augusta B.G.; Ricardi-Branco F.
发表日期	2020
ISSN	0031-0182
卷号	556
英文摘要	Theropod tooth crowns are abundant in the Upper Cretaceous (post-Coniacian) continental deposits of the Bauru Group, Brazil. The distribution of anatomical crown features indicates that a variety of carnivorous dinosaurs inhabited the area at that time, which is consistent with fossil records from other parts of Gondwana. More specifically, some authors have attributed several isolated specimens to the Carcharodontosauridae; while this has important implications for palaeobiogeography and paleoecology, other scholars have argued that the clade became extinct during the Turonian. In this study, we conducted discriminant and phylogenetic analyses for 18 crowns putatively assigned to the Carcharodontosauridae. In short, the discriminant analysis suggested that the specimens should be tentatively assigned to the following groups: non-abelisauroid Ceratosauria, Abelisauridae, Neovenatoridae, Dromaeosauridae, and Pantyrannosauria. By contrast, the phylogenetic analysis indicated that all should be assigned to abelisaurid theropods, which is consistent with the theropod osteological records in both Brazil and Argentina. We recommend using a combined approach involving morphometric and phylogenetic tools when identifying isolated teeth, as this may yield more reliable identifications. We also suggest that all previous reports on the presence of post-Turonian carcharodontosaurids in the Bauru Group are invalid, which also corroborates previous work. Our results indicate that abelisaurids from the Bauru Basin were diverse in morphology and activity; that is, many were quite large and/or played important ecological roles. Findings also support the hypothesis that this taxon had a preference for semi-arid environments. © 2020 Elsevier B.V.
英文关键词	Abelisauridae; Bauru Group; Gondwana; Morphometrics; Systematics; Tooth crown
语种	英语
scopus关键词	Cretaceous; dinosaur; fossil record; morphology; osteology; paleobiogeography; paleoecology; phylogenetics; semiarid region; tooth; Argentina; Bauru Basin; Brazil; Ceratosauria; Dinosauria; Dromaeosauridae; Theropoda
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150397
作者单位	Universidade Estadual de Campinas (UNICAMP), Instituto de Geociências, Cidade Universitária, Rua Carlos Gomes, 250, Campinas, SP 13083-855, Brazil; Museu Nacional, Universidade Federal do Rio de Janeiro (MN/UFRJ), Quinta da Boa Vista s/n, São Cristóvão, Rio de Janeiro, RJ 20940-040, Brazil; Universidade Federal do Rio Grande do Norte (UFRN), Departamento de Geologia, Campus Universitário, Rua das Engenharias, s/n, Natal, RN 59078-970, Brazil; Museu de Zoologia, Universidade de São Paulo, Avenida Nazaré, 481, São Paulo, SP 04263-000, Brazil; ISEM at Southern Methodist University, Heroy Science Hall, 3225 Daniel Ave, Dallas, TX 75205, United States
推荐引用方式 GB/T 7714	Delcourt R.,Brilhante N.S.,Grillo O.N.,et al. Carcharodontosauridae theropod tooth crowns from the Upper Cretaceous (Bauru Basin) of Brazil: A reassessment of isolated elements and its implications to palaeobiogeography of the group[J],2020,556.
APA	Delcourt R.,Brilhante N.S.,Grillo O.N.,Ghilardi A.M.,Augusta B.G.,&Ricardi-Branco F..(2020).Carcharodontosauridae theropod tooth crowns from the Upper Cretaceous (Bauru Basin) of Brazil: A reassessment of isolated elements and its implications to palaeobiogeography of the group.Palaeogeography, Palaeoclimatology, Palaeoecology,556.
MLA	Delcourt R.,et al."Carcharodontosauridae theropod tooth crowns from the Upper Cretaceous (Bauru Basin) of Brazil: A reassessment of isolated elements and its implications to palaeobiogeography of the group".Palaeogeography, Palaeoclimatology, Palaeoecology 556(2020).