A new ornithopod dinosaur (Dinosauria: Ornithischia) from the Late Cretaceous of central Patagonia

Ibiricu, Lucio Manuel; Casal, Gabriel; Martı́nez, Rubén D.; Luna, Marcelo; Canale, Juan Ignacio; Álvarez, Bruno N.; Riga, Bernardo González

doi:10.1016/j.cretres.2019.02.001

Cited by 17 publications

(10 citation statements)

References 43 publications

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“…Distal caudals are indistinguishable from other basal ornithopods (e.g. Gasparinisaura, Anabisetia, Talenkauen, Macrogryphosaurus, Diluvicursor, Sektensaurus, Trinisaura, Jeholosaurus;Coria & Salgado, 1996;Cambiaso, 2007;Calvo et al, 2007;Barrett et al, 2011;Han et al, 2012;Barrett, 2016;Herne et al, 2018;Ibiricu et al, 2019;Rozadilla et al, 2019). Scapula ( Figure 10).…”

Section: Caudal Vertebraementioning

confidence: 98%

“…In ventral view, its anterior margin is notably transversely wide and presents large, fan-like transverse processes that bear articulation facets for the sacral ribs. This strong lateral projection is shared with Jeholosaurus and Anabisetia (Cambiaso, 2007;Han et al, 2012), whereas in Macrogryphosaurus these projections are feebly developed and in Sektensaurus are totally absent (Ibiricu et al, 2019;Rozadilla et al, 2019). The articular surface for ribs is oval in contour and bears a rugous surface, being dorsolaterally facing.…”

Section: Description Cervical Vertebramentioning

confidence: 98%

“…The femoral head and neck are poorly preserved. They seem to be proximomedially elongate, describing an obtuse angle with the longitudinal axis of femur, a condition typical for titanosauriforms (González Riga et al, 2019).…”

Section: Sauropoda Marsh 1878mentioning

confidence: 98%

“…This pit articulates with a process located on the anteroventral surface of the second sacral, resulting in a peg-and socket articulation. In other elasmarians, such as Gasparinisaura and Sektensaurus the contact between both elements is nearly flat (Ibiricu et al, 2019;Rozadilla et al, 2019). On the ventral surface, this sacral has a shallow ventral keel located at the bottom of a wide and shallow longitudinal groove.…”

Section: Description Cervical Vertebramentioning

confidence: 99%

“…Because of the paucity of the available materials, the phylogenetic position of Nullotitan among titanosaurs is difficult to discern. This taxon exhibits features diagnosing Titanosauria, as well as characteristics of less inclusive clades such as Lithostrotia, Colossosauria, and Lognkosauria (González Riga et al, 2019). In addition, Nullotitan lacks features diagnosing the derived titanosaur clades Saltasauridae and Aeolosaurini.…”

Section: Sauropoda Marsh 1878mentioning

confidence: 99%

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Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Novas¹,

Agnolín²,

Rozadilla³

et al. 2019

MACN

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The first fossil remains of vertebrates, invertebrates, plants and palynomorphs of the Chorrillo Formation (Austral Basin), about 30km to the SW of the town of El Calafate (Province of Santa Cruz), are described. Fossils include the elasmarian (basal Iguanodontia) Isasicursor santacrucensis gen. et sp. nov., the large titanosaur Nullotitan glaciaris gen. et sp. nov., both large and small Megaraptoridae indet., and fragments of sauropod and theropod eggshells. The list of vertebrates is also composed by the Neognathae Kookne yeutensis gen. et sp. nov., two isolated caudal vertebrae of Mammalia indet., and isolated teeth of a large mosasaur. Remains of fishes, anurans, turtles, and snakes are represented by fragmentary material of low taxonomical value, with the exception of remains belonging to Calyptocephalellidae. On the other hand, a remarkable diversity of terrestrial and freshwater gastropods has been documented, as well as fossil woods and palinological assemblages. The Chorrillo Formation continues south, in the Las Chinas River valley, southern Chile, where it is called Dorotea Formation. Both units share in their lower two thirds abundant materials of titanosaurs, whose remains cease to appear in the upper third, registering only elasmarians (Chorrillo Formation) and hadrosaurs (Dorotea Formation). Above both units there are levels with remains of invertebrates and marine reptiles. It is striking that the dinosaurs of the lower two thirds of the Chorrillo and Dorotea formations are represented by large basal titanosaurs and Megaraptoridae coelurosaurs, being the Saltasaurinae and Aeolosaurinae sauropods and Abelisauridae theropods totally absent. In contrast, these taxa are dominant components in sedimentary units of central and northern Patagonia (e.g., Allen, Los Alamitos, La Colonia formations). Such differences could reflect, in part, a greater antiquity (i.e., late Campanian-early Maastrichtian) for the Chorrillo fossils, or, more probably, different environmental conditions. Thus, knowledge of the biota of the southern tip of Patagonia is expanded, particularly those temporarily close to the K-Pg boundary.

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Section: Caudal Vertebraementioning

confidence: 98%

Section: Description Cervical Vertebramentioning

confidence: 98%

Section: Sauropoda Marsh 1878mentioning

confidence: 98%

Section: Description Cervical Vertebramentioning

confidence: 99%

Section: Sauropoda Marsh 1878mentioning

confidence: 99%

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Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Novas¹,

Agnolín²,

Rozadilla³

et al. 2019

MACN

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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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Tracing Late Jurassic ornithopod diversity in the eastern Iberian Peninsula: Camptosaurus-like postcranial remains from Alpuente (Valencia, Spain)

Sánchez-Fenollosa

Verdú²,

Suñer

et al. 2022

J Iber Geol

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A new ornithopod dinosaur (Dinosauria: Ornithischia) from the Late Cretaceous of central Patagonia

Cited by 17 publications

References 43 publications

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

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

Tracing Late Jurassic ornithopod diversity in the eastern Iberian Peninsula: Camptosaurus-like postcranial remains from Alpuente (Valencia, Spain)

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