Biogeography of theropod dinosaurs during the Late Cretaceous: evidence from central South America Author Delcourt, Rafael Universidade Estadual de Campinas (UNICAMP), Instituto de Geociências, Cidade Universitária, Rua Carlos Gomes, 250, 13083 - 855 Campinas, SP, Brazil & Laboratório de Paleontologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes, 3900, 14040 - 901, Ribeirão Preto, SP, Brazil & SNSB, Baverische Staatssammlung für Paläontologie und Geologie, Department of Earth and Environmental Sciences, GeoBioCenter, Ludwig- Maximilians-Universitv, Richard-Wagner-Strasse 10, D- 80333 München, Germanv rafael.delcourt@gmail.com Author Brilhante, Natan S Departamento de Geologia e Paleontologia, Museu Nacional, da Universidade Federal do Rio de Janeiro (MN / UFRJ), Rio de Janeiro, Brazil Author Pires-Domingues, Ricardo A Alimíni Consultoria Científica Ltda. Rua Manoel Vieira Sarmento, 03, Chácara Santana São Paulo, SP, Brazil Author Hendrickx, Christophe Unidad Ejecutora Lillo, CONICET - Fundación Miguel Lillo, Miguel Lillo 251, San Miguel de Tucumán 4000, Tucumán, Argentina Author Grillo, Orlando N Departamento de Geologia e Paleontologia, Museu Nacional, da Universidade Federal do Rio de Janeiro (MN / UFRJ), Rio de Janeiro, Brazil ongrillo@mn.ufrj.br Author Augusta, Bruno G Laboratório de Paleontologia, Centro Universitário Fundação Santo André, Avenida Príncipe de Gales, 821, 09060 - 650, Santo André, SP, Brazil & Museu de Zoologia, Universidade de São Paulo, Avenida Nazaré, 481, 04263 - 000, São Paulo, SP, Brazil & ISEM at Southern Methodist Universitv, Dallas, TX, USA Author Maciel, Bárbara S Departamento de Geologia e Paleontologia, Museu Nacional, da Universidade Federal do Rio de Janeiro (MN / UFRJ), Rio de Janeiro, Brazil Author Ghilardi, Aline M Departamento de Geologia, Universidade Federal do Rio Grande do Norte (UFRN), Rua das Engenharias, s / n, Lagoa Nova, 59072 - 970, Natal, RN, Brazil & Laboratório de Paleoecologia e Paleoicnologia, Departamento de Ecologia e Biologia Evolutiva (DEBE), Universidade Federal de São Carlos (UFSCar), Rod. Washington Luís, s / n, Monjolinho, 13565 - 905, São Carlos, SP, Brazil Author Ricardi-Branco, Fresia Universidade Estadual de Campinas (UNICAMP), Instituto de Geociências, Cidade Universitária, Rua Carlos Gomes, 250, 13083 - 855 Campinas, SP, Brazil text Zoological Journal of the Linnean Society 2024 2024-01-06 202 2 1 40 https://doi.org/10.1093/zoolinnean/zlad184 journal article 306116 10.1093/zoolinnean/zlad184 c3dec8c0-2827-48f2-a729-f8f37fa8f864 0024-4082 14283762 Morphotype VII These are allosauroid-like mesial teeth, similar to morphotype VI but differing in being more elongated (CHR> 1.6) and/or thicker (CBR>.55). The mesial carina is either straight and centrally positioned on the mesial surface or slightly twisted lingually. They differ from the abelisaurid mesial teeth in the absence of concavity adjacent to the carinae on the crown, the symmetrical appearance of the tooth (i.e. lanceolate cross-sectional outline at the base of the crown), and the slightly to strongly concave distal profile. Table 2. Numerical results from linear discriminant analysis for each dental element from the Bauru Basin.
Taxa Number of crowns Percentage
Abelisauridae 54 30.51
Carcharodontosauridae 4 2.23
Dromaeosauridae 3 1.67
Neovenatoridae 87 49.15
Noasauridae 4 2.23
Non-abelisauroid Ceratosauria 20 11.17
Non-tyrannosaurid Pantyrannosauria 2 1.12
Spinosauridae 3 1.67
Total 177 100.00
Table 3. Reclassification of the isolated crowns obtained from our linear discriminant analysis. The MPMA specimens were originally described by Tavares et al. (2014) ; MCT.R. 859a was described by Bittencourt and Kellner (2002) , and UFRJ-DG409-R was classified by Delcourt and Grillo (2018a) .
Specimen Original classification New classification
UFRJ-DG409-R Abelisauridae Non-abelisauroid Ceratosauria
MPMA12-00D1-97 Abelisauridae Non-abelisauroid Ceratosauria
MPMA-12-00D3-97 Abelisauridae Neovenatoridae
MPMA-12-00D4-97 Abelisauridae Neovenatoridae
MPMA-12-00D5-97 Abelisauridae Neovenatoridae
MPMA-12-00D7-97 Abelisauridae Abelisauridae
MPMA-12-0D10-97 Abelisauridae Noasauridae
MPMA-12-0D11-97 Abelisauridae Neovenatoridae
MPMA-12-0D12-97 Abelisauridae Neovenatoridae
MPMA-12-0D13-97 Dromaeosauridae Neovenatoridae
MPMA-12-0D14-97 Dromaeosauridae Neovenatoridae
MCT.R. 859a Abelisauridae Spinosauridae
Identification: Probably abelisaurid mesial or transitional teeth from a taxon with vaguely convergent similarity to carcharodontosaurid teeth. Specimens from Ibirá , São Paulo state , Adamantina Formation : LPP-PV 1100 ( Fig. 21 ), LPP-PV 1101 , LPP-PV 1104 ( Fig. 22 ), and LPP-PV 1106 ( Fig. 23 ). Specimen from Flórida Paulista , São Paulo state , Adamantina Formation : UFRJ-DG 372-Rd .