Fossil vertebrates from the Cerro Fortaleza Formation (Upper Cretaceous), Santa Cruz Province, Argentina

Agnolín, Federico L.; Álvarez Herrera, Gerardo; Rolando, Mauro Aranciaga; Motta, Matías; Rozadilla, Sebastián; Verdiquio, Lucía; D'Angelo, Julia S.; Moyano-Paz, Damián; Varela, Augusto N.; Sterli, Juliana; Bogan, Sergio; Miner, Santiago; Moreno Rodríguez, Ana; Muñoz, Gonzalo; Isasi, Marcelo P.; Novas, Fernando E.

doi:10.1016/j.cretres.2023.105735

Cretaceous Research

2024

DOI: 10.1016/j.cretres.2023.105735

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Fossil vertebrates from the Cerro Fortaleza Formation (Upper Cretaceous), Santa Cruz Province, Argentina

Federico L. Agnolín,

Gerardo Álvarez Herrera,

Mauro Aranciaga Rolando

et al.

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2024

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Cited by 3 publications

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A new semi‐fossorial thescelosaurine dinosaur from the Cenomanian‐age Mussentuchit Member of the Cedar Mountain Formation, Utah

Avrahami,

Makovicky,

Tucker

et al. 2024

The Anatomical Record

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Thescelosaurines are a group of early diverging, ornithischian dinosaurs notable for their conservative bauplans and mosaic of primitive features. Although abundant within the latest Cretaceous ecosystems of North America, their record is poor to absent in earlier assemblages, leaving a large gap in our understanding of their evolution, origins, and ecological roles. Here we report a new small bodied thescelosaurine—Fona herzogae gen. et sp. nov.—from the Mussentuchit Member of the Cedar Mountain Formation, Utah, USA. Fona herzogae is represented by multiple individuals, representing one of the most comprehensive skeletal assemblages of a small bodied, early diverging ornithischian described from North America to date. Phylogenetic analysis recovers Fona as the earliest member of Thescelosaurinae, minimally containing Oryctodromeus, and all three species of Thescelosaurus, revealing the clade was well‐established in North America by as early as the Cenomanian, and distinct from, yet continental cohabitants with, their sister clade, Orodrominae. To date, orodromines and thescelosaurines have not been found together within a single North American ecosystem, suggesting different habitat preferences or competitive exclusion. Osteological observations reveal extensive intraspecific variation across cranial and postcranial elements, and a number of anatomical similarities with Oryctodromeus, suggesting a shared semi‐fossorial lifestyle.

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A new semi‐fossorial thescelosaurine dinosaur from the Cenomanian‐age Mussentuchit Member of the Cedar Mountain Formation, Utah

Avrahami,

Makovicky,

Tucker

et al. 2024

The Anatomical Record

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Purported crushing teeth of actinopterygian fishes from the Late Cretaceous of Patagonia reinterpreted as crustacean bio-gastroliths

Panzeri,

Bogan,

Raigemborn

et al. 2024

Journal of South American Earth Sciences

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An Unusual Circumpolar Turtle (Testudinata: Testudines) from the Earliest Late Cretaceous of Patagonia, Argentina

Sterli,

Moyano-Paz,

Varela

et al. 2024

Ameghiniana

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Fossil vertebrates from the Cerro Fortaleza Formation (Upper Cretaceous), Santa Cruz Province, Argentina

Cited by 3 publications

References 123 publications

A new semi‐fossorial thescelosaurine dinosaur from the Cenomanian‐age Mussentuchit Member of the Cedar Mountain Formation, Utah

A new semi‐fossorial thescelosaurine dinosaur from the Cenomanian‐age Mussentuchit Member of the Cedar Mountain Formation, Utah

Purported crushing teeth of actinopterygian fishes from the Late Cretaceous of Patagonia reinterpreted as crustacean bio-gastroliths

An Unusual Circumpolar Turtle (Testudinata: Testudines) from the Earliest Late Cretaceous of Patagonia, Argentina

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