The Northernmost Record of Abelisauridae (Theropoda: Ceratosauria) from the Upper Cretaceous Bauru Basin, Brazil DOI
Carlos Roberto A. Candeiro, Theo Baptista Ribeiro,

Thainara Arruda de Paula

et al.

Published: Jan. 1, 2024

Language: Английский

Diuqin lechiguanae gen. et sp. nov., a new unenlagiine (Theropoda: Paraves) from the Bajo de la Carpa Formation (Neuquén Group, Upper Cretaceous) of Neuquén Province, Patagonia, Argentina DOI Creative Commons
Juan D. Porfiri, Mattia A. Baiano, Domenica D. Dos Santos

et al.

BMC Ecology and Evolution, Journal Year: 2024, Volume and Issue: 24(1)

Published: June 14, 2024

Abstract Background Unenlagiine paravians are among the most relevant Gondwanan theropod dinosaur clades for understanding origin of birds, yet their fossil record remains incomplete, with taxa being represented by fragmentary material and/or separated lengthy temporal gaps, frustrating attempts to characterize unenlagiine evolution. Results and conclusions Here we describe Diuqin lechiguanae gen. et sp. nov., a new taxon from Upper Cretaceous (Santonian) Bajo de la Carpa Formation Neuquén Basin Province in northern Patagonia, Argentina that fills substantial stratigraphic gap these theropods. Although known only very incomplete postcranial skeleton, preserved bones differ corresponding elements other unenlagiines, justifying erection taxon. Moreover, several morphological aspects, humerus appears intermediate between those geologically older unenlagiines (e.g., Unenlagia spp. Turonian–Coniacian Portezuelo Formation) stratigraphically younger, larger-bodied Austroraptor cabazai Campanian–Maastrichtian Allen Formation. Consequently, morphology indicate transitional stage Phylogenetic analysis recovers as paravian multiple plausible systematic positions, but strongest affinity is Unenlagiinae. The form exhibits subcircular punctures near its distal end interpreted feeding traces likely left conical-toothed crocodyliform, mammal, or theropod, latter potentially megaraptorid another individual. Thus, addition filling important gaps evolutionary history, also offers information relating paleoecology

Language: Английский

Citations

2
A lost tooth in the jungle: revisiting the sole dinosaurian record from northern Brazil DOI Creative Commons
Theo Baptista Ribeiro, ATHIRSON S. ALBUQUERQUE, THIAGO BRAGANÇA

et al.

Anais da Academia Brasileira de Ciências, Journal Year: 2024, Volume and Issue: 96(suppl 1)

Published: Jan. 1, 2024

The record of Mesozoic reptiles in the Northern region Brazil is extremely limited, with only definite occurrence consisting two ziphodont teeth recovered from an oil well core municipality Nova Olinda do Norte, Amazonas state, strata Alter Chão Formation (Cenomanian) Basin. In this study, we aim to reevaluate MCT.R.514 using most recent methodologies available for identification isolated theropod teeth. cladistic analyses as a possible metriacanthosaurid or non carcharodontosaurid allosauroid while LDAs showed affinities between specimen and Abelisauridae, Piatniktzysauridae, Tyrannosauridae. was assigned abelisaurid due its overall morphology that lacked synapomorphies (i.e. spiraling mesial carina, strongly labially displaced distal well-marked mesiolingual longitudinal groove), maintaining homoplastic features both groups irregular enamel texture, lingually biconcave cross section, straight margin). This, together mostly Laurasian distribution Metriacanthosauridae favors assignment parsimonious hypothesis occasion. further expands still scarce "Mid'' Cretaceous clade Brazil.

Language: Английский

Citations

2
New records of Theropoda from a Late Cretaceous (Campanian-Maastrichtian) locality in the Magallanes-Austral Basin, Patagonia, and insights into end Cretaceous theropod diversity DOI Creative Commons
Sarah N. Davis, Sergio Soto‐Acuña, Roy A. Fernández

et al.

Journal of South American Earth Sciences, Journal Year: 2022, Volume and Issue: 122, P. 104163 - 104163

Published: Dec. 17, 2022

Language: Английский

Citations

9
On the first Baryonychinae (Theropoda, Spinosauridae) teeth from South America DOI
Mauro B.S. Lacerda, Paulo R.L. Aragão, Fabiana Silva Vieira

et al.

Zootaxa, Journal Year: 2023, Volume and Issue: 5264(4), P. 526 - 544

Published: April 17, 2023

We report the first occurrence in South America of spinosaurid specimens belonging to clade Baryonychinae. The material comprises three tooth crowns recovered from Lower Cretaceous (Berriasian-Valanginian) Feliz Deserto Formation, State Sergipe, northeast Brazil. have typical conidont condition, displaying a fluted morphology, veined enamel texture and carinae extending cervix region, conditions similar those shared among theropods. Furthermore, notable feature is presence serrated composed 6-7 diminutive denticles per millimetre, key by baryonychine spinosaurids. Phylogenetic multivariate analyses performed on dentition-based crown-based datasets theropod taxa confirm relationship described here with well-supported clade. Our results retrieve which comprise "classically" as individual branches within polytomy includes subclade spinosaurines (Spinosaurus + Angaturama/Irritator). Additionally, discriminant cluster suggest that materials are more Suchomimus than Baryonyx morphometrically, but clearly bearing similarities baryonychines (sharing morphospace). These new findings paleogeographically expand this western Gondwana, one oldest records worldwide, brings implications hypotheses for emergence evolution these indicate taxon deltaic paleoenvironment Formation.

Language: Английский

Citations

5
Reassessment of theropod material from Pichasca, Northern Chile: Presence of Abelisauridae (Theropoda: Ceratosauria) from the Quebrada La Totora Beds (Albian - Turonian) DOI

Jared Amudeo-Plaza,

Sergio Soto‐Acuña, Raúl Ugalde

et al.

Journal of South American Earth Sciences, Journal Year: 2023, Volume and Issue: 129, P. 104494 - 104494

Published: July 21, 2023

Language: Английский

Citations

4
TAPHONOMY AND PALEOHISTOLOGY OF A DINOSAUR RIB FROM MARÍLIA FORMATION, BAURU GROUP, IN THE STATE OF MINAS GERAIS, BRAZIL DOI
Vinícius José Maróstica Paio, Isabela Jurigan, Rafael Delcourt

et al.

Cretaceous Research, Journal Year: 2024, Volume and Issue: 160, P. 105899 - 105899

Published: April 4, 2024

Language: Английский

Citations

1
Mandibular force profiles of Alioramini (Theropoda: Tyrannosauridae) with implications for palaeoecology of this unique lineage of tyrannosaurid dinosaurs DOI Creative Commons
Chan‐gyu Yun

Lethaia, Journal Year: 2024, Volume and Issue: 57(2), P. 1 - 12

Published: June 20, 2024

Language: Английский

Citations

1
Carnivorous dinosaurs of the Late Cretaceous Bauru Group in Central Brazil: records, diversity, taxonomic composition and paleobiogeography DOI
Carlos Roberto A. Candeiro, Stephen L. Brusatte,

Bernardo Gonzalez-Riga

et al.

Journal of South American Earth Sciences, Journal Year: 2024, Volume and Issue: 144, P. 105041 - 105041

Published: July 17, 2024

Language: Английский

Citations

1
Isolated theropod teeth from the Upper Cretaceous of Goias State (Brazil): northernmost occurrence of Abelisauridae from the Bauru Basin DOI
Carlos Roberto A. Candeiro, Theo Baptista Ribeiro,

Thainara Arruda de Paula

et al.

Journal of South American Earth Sciences, Journal Year: 2024, Volume and Issue: 146, P. 105075 - 105075

Published: Aug. 8, 2024

Language: Английский

Citations

1
A small abelisaurid caudal vertebra from the Bauru Basin, Presidente Prudente Formation (Late Cretaceous), Brazil adds information about the diversity and distribution of theropods in central South America DOI
Rafael Delcourt, Max C. Langer

Journal of South American Earth Sciences, Journal Year: 2022, Volume and Issue: 116, P. 103879 - 103879

Published: June 1, 2022

Language: Английский

Citations

6