Published January 6, 2024 | Version v1

Abelisauridae Bonaparte & Novas 1985

  • 1. 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
  • 2. Departamento de Geologia e Paleontologia, Museu Nacional, da Universidade Federal do Rio de Janeiro (MN / UFRJ), Rio de Janeiro, Brazil
  • 3. Alimíni Consultoria Científica Ltda. Rua Manoel Vieira Sarmento, 03, Chácara Santana São Paulo, SP, Brazil
  • 4. Unidad Ejecutora Lillo, CONICET - Fundación Miguel Lillo, Miguel Lillo 251, San Miguel de Tucumán 4000, Tucumán, Argentina
  • 5. 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
  • 6. 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
  • 7. Universidade Estadual de Campinas (UNICAMP), Instituto de Geociências, Cidade Universitária, Rua Carlos Gomes, 250, 13083 - 855 Campinas, SP, Brazil

Description

Morphotype V

Teeth grouped in this morphotype resemble those from the mesial dentition of noasaurid theropods. They are similar to typical abelisaurid mesial teeth, but differ from them in their very small size (<1 cm), strongly lingually deflected mesial carina, which faces lingually (the mesial denticles point lingually), a single concave surface adjacent to the distal carina on the lingual surface, and a cross-sectional outline between a salinon and a D-shaped outline.

Identification: A tooth of this morphotype is identified as belonging to the mesialmost dentition of a juvenile abelisaurid. It differs from noasaurid mesial teeth in having a DSDI close to one and the absence of a constriction between the crown and root, flutes on the lingual surfaces, and poorly developed mesial denticles or an unserrated mesial carina, making the referral to this clade unlikely.

Specimen from Ibirá, São Paulo state, Adamantina Formation: LPP-PV 1150 (Fig. 17).

Notes

Published as part of Delcourt, Rafael, Brilhante, Natan S, Pires-Domingues, Ricardo A, Hendrickx, Christophe, Grillo, Orlando N, Augusta, Bruno G, Maciel, Bárbara S, Ghilardi, Aline M & Ricardi-Branco, Fresia, 2024, Biogeography of theropod dinosaurs during the Late Cretaceous: evidence from central South America, pp. 1-40 in Zoological Journal of the Linnean Society 202 (2) on pages 29-30, DOI: 10.1093/zoolinnean/zlad184, http://zenodo.org/record/14283762

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