New hadrosaurid (Dinosauria: Ornithopoda) fossils from the uppermost Cretaceous of central Patagonia and the influence of paleoenvironment on South American hadrosaur distribution

Ibiricu, Lucio Manuel; Casal, Gabriel; Álvarez, Bruno N.; Tomas, Andrea De Sosa; Lamanna, Matthew C.; Cruzado‐Caballero, Penélope

doi:10.1016/j.jsames.2021.103369

Cited by 7 publications

(2 citation statements)

References 63 publications

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“…However, the proposed existence of Parankylosauria suggests that most Gondwanan ankylosaurs are more closely related to each other than to those found elsewhere (Soto-Acuña et al, 2021). The only current exception is the Argentinian ankylosaur, a nodosaurid (Figure 8) that appeared in Gondwana following dispersal events from Laramidia during the Campanian-Maastrichtian, a pattern also observed among hadrosaurids and titanosaurs (Brett-Surman, 1979;Coria and Salgado, 2001;Prieto-Márquez, 2010;Arbour and Currie, 2016;Ibiricu et al, 2021). Given the mid-upper Albian ages of Australian ankylosaurs, the Gondwanan dispersal of Parankylosauria considerably predated those of the latest Cretaceous (Arbour and Currie, 2016;Kubo, 2020;Soto-Acuña et al, 2021).…”

Section: Implications For Australian Ankylosaur Diversitymentioning

confidence: 88%

New Ankylosaurian Cranial Remains From the Lower Cretaceous (Upper Albian) Toolebuc Formation of Queensland, Australia

et al. 2022

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Australian dinosaur research has undergone a renaissance in the last 10 years, with growing knowledge of mid-Cretaceous assemblages revealing an endemic high-paleolatitude Gondwanan fauna. One of its most conspicuous members is ankylosaurs, which are rare but nonetheless occur in most Australian dinosaur-bearing formations spanning the uppermost Barremian to lower Cenomanian. Here we describe a partial ankylosaur skull from the marine Toolebuc Formation exposed near Boulia in western Queensland, Australia. This skull represents the oldest ankylosaurian material from Queensland, predating the holotype of Kunbarrasaurus ieversi, which was found in the overlying Allaru Mudstone. The ankylosaur skull is encased in a limestone concretion with the maxillary tooth rows preserved only as impressions. Synchrotron radiation X-ray tomography was used to non-destructively image and reconstruct the specimen in 3D and facilitate virtual preparation of the separate cranial bones. The reconstruction of the skull revealed the vomer, palatines, sections of the ectopterygoids and maxillae, and multiple teeth. The palate has posteriorly positioned choanae that differs from the more anterior placement seen in most other ankylosaurians, but which is shared with K. ieversi, Akainacephalus johnsoni, Cedarpelta bilbeyhallorum, Gobisaurus domoculus, and Panoplosaurus mirus. Phylogenetic analyses place the new cranial material within the recently named basal ankylosaurian clade Parankylosauria together with K. ieversi. This result, together with the anatomical similarities to the holotype of K. ieversi, permits its referral to cf. Kunbarrasaurus sp. This specimen elucidates the palatal anatomy of Australian ankylosaurs and highlights one of the most ubiquitous components of Australian mid-Cretaceous dinosaur faunas.

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Section: Implications For Australian Ankylosaur Diversitymentioning

confidence: 88%

New Ankylosaurian Cranial Remains From the Lower Cretaceous (Upper Albian) Toolebuc Formation of Queensland, Australia

et al. 2022

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“…The existence of basal hadrosauroids and lambeosaurines in Europe suggests at least two dispersals 7 , followed by dispersal of lambeosaurines into Africa 7 . The discovery of basal hadrosauroids in South America suggests two dispersals into South America, one by basal hadrosauroids 83 and one by kritosaurins 86 , 87 , which dispersed into Antarctica 86 . Hadrosaurines dispersed into Appalachia; reinterpretation of Lophorhothon as a basal hadrosauroid suggests saurolophines did not disperse into Appalachia 88 .…”

Section: Discussionmentioning

confidence: 99%

A new small duckbilled dinosaur (Hadrosauridae: Lambeosaurinae) from Morocco and dinosaur diversity in the late Maastrichtian of North Africa

Longrich,

Pereda-Suberbiola,

Bardet

et al. 2024

Sci Rep

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In the Late Cretaceous, northern and southern hemispheres evolved distinct dinosaurian faunas. Titanosaurians and abelisaurids dominated the Gondwanan continents; hadrosaurids, ceratopsians and tyrannosaurs dominated North America and Asia. Recently, a lambeosaurine hadrosaurid, Ajnabia odysseus, was reported from the late Maastrichtian phosphates of the Oulad Abdoun Basin Morocco, suggesting dispersal between Laurasia and Gondwana. Here we report new fossils from the phosphates of Morocco showing lambeosaurines achieved high diversity in the late Maastrichtian of North Africa. A skull represents a new dwarf lambeosaurine, Minqaria bata. Minqaria resembles Ajnabia odysseus in size, but differs in the ventrally positioned jugal facet and sinusoidal toothrow. The animal is small, ~ 3.5 m long, but the fused braincase shows it was mature. A humerus and a femur belong to larger hadrosaurids, ~ 6 m long, implying at least three species coexisted. The diversity of hadrosaurids in Europe and Africa suggests a dispersal-driven radiation, with lambeosaurines diversifying to take advantage of low ornithischian diversity. African lambeosaurines are small compared to North American and Asia hadrosaurids however, perhaps due to competition with titanosaurians. Hadrosaurids are unknown from eastern Africa, suggesting Moroccan hadrosaurids may be part of a distinct insular fauna, and represent an island radiation.

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Lower Cretaceous iguanodontian dinosaurs from the southwestern margin of Gondwana

Alarcón-Muñoz,

Cruzado-Caballero,

Vicencio Campos

et al. 2024

Cretaceous Research

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New hadrosaurid (Dinosauria: Ornithopoda) fossils from the uppermost Cretaceous of central Patagonia and the influence of paleoenvironment on South American hadrosaur distribution

Cited by 7 publications

References 63 publications

New Ankylosaurian Cranial Remains From the Lower Cretaceous (Upper Albian) Toolebuc Formation of Queensland, Australia

New Ankylosaurian Cranial Remains From the Lower Cretaceous (Upper Albian) Toolebuc Formation of Queensland, Australia

A new small duckbilled dinosaur (Hadrosauridae: Lambeosaurinae) from Morocco and dinosaur diversity in the late Maastrichtian of North Africa

Lower Cretaceous iguanodontian dinosaurs from the southwestern margin of Gondwana

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