Evolutionary origins of the prolonged extant squamate radiation DOI Creative Commons
Chase Doran Brownstein, Dalton L. Meyer, Matteo Fabbri

и другие.

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Ноя. 29, 2022

Abstract Squamata is the most diverse clade of terrestrial vertebrates. Although origin pan-squamates lies in Triassic, oldest undisputed members extant clades known from nearly complete, uncrushed material come Cretaceous. Here, we describe three-dimensionally preserved partial skulls two new crown lizards Late Jurassic North America. Both species are placed at base skink, girdled, and night lizard Pan-Scincoidea, which consistently occupies a position deep inside squamate both morphological molecular phylogenies. The show that several features uniting pan-scincoids with another major clade, pan-lacertoids, trees using morphology were convergently acquired as predicted by analyses. Further, palate one bears handful ancestral saurian characteristics lost all squamates, revealing an underappreciated degree complex evolution early crown. We find strong evidence for close relationships between Cretaceous taxa Eurasia. Together, these results suggest squamates had wide geographic distribution experienced complicated even while Rhynchocephalia, now solely represented tuatara, was dominant lepidosaurs.

Язык: Английский

Subaqueous foraging among carnivorous dinosaurs DOI
Matteo Fabbri, Guillermo Navalón, Roger Benson

и другие.

Nature, Год журнала: 2022, Номер 603(7903), С. 852 - 857

Опубликована: Март 23, 2022

Язык: Английский

Процитировано

44
A new abelisaurid dinosaur from the end Cretaceous of Patagonia and evolutionary rates among the Ceratosauria DOI Creative Commons
Diego Pol, Mattia A. Baiano, David Černý

и другие.

Cladistics, Год журнала: 2024, Номер 40(3), С. 307 - 356

Опубликована: Май 21, 2024

Abstract Gondwanan dinosaur faunae during the 20 Myr preceding Cretaceous–Palaeogene (K/Pg) extinction included several lineages that were absent or poorly represented in Laurasian landmasses. Among these, South American fossil record contains diverse abelisaurids, arguably most successful groups of carnivorous dinosaurs from Gondwana Cretaceous, reaching their highest diversity towards end this period. Here we describe Koleken inakayali gen. et sp. n., a new abelisaurid La Colonia Formation (Maastrichtian, Upper Cretaceous) Patagonia. is known skull bones, an almost complete dorsal series, sacrum, caudal vertebrae, pelvic girdle and hind limbs. The shows unique set features anatomical differences Carnotaurus sastrei (the only other Formation). retrieved as brachyrostran abelisaurid, clustered with abelisaurids latest Cretaceous (Campanian–Maastrichtian), such Aucasaurus , Niebla . Leveraging our phylogeny estimates, explore rates morphological evolution across ceratosaurian lineages, finding them to be particularly high for elaphrosaurine noasaurids around base Abelisauridae, before Early radiation latter clade. Noasauridae sister clade show contrasting patterns evolution, undergoing early phase accelerated axial limb skeleton Jurassic, exhibiting sustained cranial Cretaceous. These results provide much needed context evolutionary dynamics theropods, contributing broader understanding macroevolutionary dinosaurs.

Язык: Английский

Процитировано

11
Cranial and postcranial anatomy of a juvenile baurusuchid (Notosuchia, Crocodylomorpha) and the taxonomical implications of ontogeny DOI
Daniel Martins dos Santos, Joyce Celerino de Carvalho, Carlos Eduardo Maia de Oliveira

и другие.

The Anatomical Record, Год журнала: 2024, Номер unknown

Опубликована: Март 1, 2024

Abstract Baurusuchidae comprises a clade of top‐tier terrestrial predators and are among the most abundant crocodyliforms found in Adamantina Formation, Bauru Basin, Brazil (Campanian‐Maastrichtian). Here, we provide detailed description cranial postcranial osteology myology complete juvenile baurusuchid to date. Although preservation individuals is somewhat rare, previously reported occurrences egg clutches, yearling individual, larger, but skeletally immature specimens, comprise unique opportunity track anatomical changes throughout their ontogenetic series. Its anatomy was resolved with aid three‐dimensional model generated by acquisition computed tomography data, its inferred adductor mandibular musculature compared that mature specimens order assess possible shifts. A subsequent phylogenetic analysis included scoring Gondwanasuchus scabrosus , smallest species known date, evaluate relations relative juvenile. We find considerable differences between juveniles adults concerning skull ornamentation muscle development, which might indicate niche partitioning, also evidence G. corresponds young semaphoront lacking features.

Язык: Английский

Процитировано

9
A giant specimen of Rhamphorhynchus muensteri and comments on the ontogeny of rhamphorhynchines DOI Creative Commons
David W. E. Hone, Skye N. McDavid

PeerJ, Год журнала: 2025, Номер 13, С. e18587 - e18587

Опубликована: Янв. 2, 2025

Rhamphorhynchus is one of the best-known pterosaurs, with well over 100 specimens being held in public collections. Most these represent juvenile animals, and adults known are typically around 1 m wingspan. Here we describe a near complete skeleton, preserved partially 3D, an animal wingspan 1.8 m, that considerably larger than other specimens, among largest non-pterodactyloid pterosaurs. This shows differences anatomy not seen smaller revealing details late-stage ontogeny this genus. The specimen exhibits disproportionate reduction size orbit increase lower temporal fenestra, proportional mandibular symphysis, unusually laterally flattened teeth, which may point to changing diet as animals grew. These features show transition from also appear large rhamphorhyhchines consistent pattern their development.

Язык: Английский

Процитировано

1
Osteohistology of Enantiornithine Birds from the Lower Cretaceous Xiagou Formation DOI Creative Commons
Jessie Atterholt, Jingmai K. O’Connor, Hai‐Lu You

и другие.

Geobios, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

1
A new hadrosauriform dinosaur from the Wessex Formation, Wealden Group (Early Cretaceous), of the Isle of Wight, southern England DOI Creative Commons
Jeremy A. F. Lockwood, David M. Martill, Susannah C. R. Maidment

и другие.

Journal of Systematic Palaeontology, Год журнала: 2021, Номер 19(12), С. 847 - 888

Опубликована: Июнь 18, 2021

A new genus and species of non-hadrosaurid hadrosauriform dinosaur, Brighstoneus simmondsi gen. et sp. nov., is described from the Lower Cretaceous Wessex Formation Isle Wight. The taxon has two autapomorphies, a nasal having modest bulla with convex sides, primary accessory ridges on lingual aspect maxillary crown. dentary at least 28 alveolar positions, which highest number recorded in an ornithopod non-parallel sided alveoli, creating character combination that unique within Iguanodontia. fauna Barremian–Aptian Wealden Group both Wight mainland England been represented for almost century by just taxa, robust Iguanodon bernissartensis more gracile Mantellisaurus atherfieldensis, referred material often being fragmentary or based unassociated elements. This discovery increases known diversity and, together recent discoveries Spain, suggests their upper Europe was considerably wider than initially realized. find also important implications validity atherfieldensis hypodigm, reassessment existing suggested.http://zoobank.org/urn:lsid:zoobank.org:pub:31F0D48F-C1DA-406E-A811-1F5937ED19F4

Язык: Английский

Процитировано

45
Africa’s oldest dinosaurs reveal early suppression of dinosaur distribution DOI
Christopher T. Griffin, Brenen M. Wynd,

Darlington Munyikwa

и другие.

Nature, Год журнала: 2022, Номер 609(7926), С. 313 - 319

Опубликована: Авг. 31, 2022

Язык: Английский

Процитировано

36
Osteohistological insight into the growth dynamics of early dinosaurs and their contemporaries DOI Creative Commons

Kristina Curry Rogers,

Ricardo N. Martínez, Carina E. Colombi

и другие.

PLoS ONE, Год журнала: 2024, Номер 19(4), С. e0298242 - e0298242

Опубликована: Апрель 3, 2024

Dinosauria debuted on Earth’s stage in the aftermath of Permo-Triassic Mass Extinction Event, and survived two other Triassic extinction intervals to eventually dominate terrestrial ecosystems. More than 231 million years ago, Upper Ischigualasto Formation west-central Argentina, dinosaurs were just getting warmed up. At this time, represented a minor fraction ecosystem diversity. Members tetrapod clades, including synapsids pseudosuchians, shared convergently evolved features related locomotion, feeding, respiration, metabolism could have risen later dominance. However, it was that radiated Mesozoic most significantly terms body size, diversity, global distribution. Elevated growth rates are one adaptations set apart, particularly from their contemporary crocodilian mammalian compatriots. When did elevated first evolve? How strategies earliest known compare with those tetrapods ecosystems? We studied femoral bone histology an array early alongside non-dinosaurian contemporaries order test whether oldest exhibited novel strategies. Our results indicate vertebrate fauna collectively exhibits relatively high rates. Dinosaurs among fastest growing taxa sample, but they occupied niche crocodylomorphs, archosauriformes, large-bodied pseudosuchians. Interestingly, these grew at least as quickly, more continuously sauropodomorph theropod Mesozoic. These data suggest that, while ancestral for likely played significant role dinosaurs’ ascent within ecosystems, not them apart contemporaries.

Язык: Английский

Процитировано

7
A reassessment of the historical fossil findings from Bahia State (Northeast Brazil) reveals a diversified dinosaur fauna in the Lower Cretaceous of South America DOI Creative Commons
Kamila L. N. Bandeira, Bruno A. Navarro, Rodrigo V. Pêgas

и другие.

Historical Biology, Год журнала: 2024, Номер unknown, С. 1 - 42

Опубликована: Апрель 11, 2024

Supposed dinosaur remains were collected between 1859 and 1906 in the Lower Cretaceous Recôncavo Basin (Northeast Brazil). Since these materials remained undescribed, most considered lost. Recently, some of historical specimens rediscovered Natural History Museum London, providing an opportunity to revisit them after 160 years. The come from five different sites, corresponding Massacará (Berriasian-Barremian) Ilhas (Valanginian-Barremian) groups. Identified bones comprise mainly isolated vertebral centra ornithopods, sauropods, theropods. Appendicular include a theropod pedal phalanx, humerus, distal half left femur with elasmarian affinities. Despite their fragmentary nature, represent earliest discovered South America, enhancing our understanding faunas Northeast Brazil. assemblage resembles coeval units Brazil, such as Rio do Peixe Basin, where ornithopods coexist sauropods This study confirms presence ornithischian dinosaurs Brazil based on osteological evidence, expanding biogeographic temporal range before continental rifting America Africa. Additionally, findings reinforce fossiliferous potential deposits Bahia State, which have been underexplored since initial discoveries.

Язык: Английский

Процитировано

7
The last of the oldies: a basal rebbachisaurid (Sauropoda, Diplodocoidea) from the early Late Cretaceous (Cenomanian–Turonian) of Patagonia, Argentina DOI
Lucas Nicolás Lerzo, Pablo A. Gallina, Juan I. Canale

и другие.

Historical Biology, Год журнала: 2024, Номер unknown, С. 1 - 26

Опубликована: Янв. 3, 2024

Rebbachisauridae is mainly recorded during the early Late Cretaceous in Gondwana, and South America particular. Sidersaura marae gen. et sp. nov. was found rocks of Huincul Formation (upper Cenomanian – Turonian) Neuquén Province, Argentina. has notable characteristics that allow recognising it as a new species defining its phylogenetic relationships. First, frontoparietal foramen, dicraeosauridae. It bears fourteen caudal vertebrae with neural arches displaced closer to anterior margin centrum ventral longitudinal hollow on middle centra, both characters previously considered titanosaurian synapomorphies, here recognised these diplodocoid sauropods. shows peculiar tarsal condition an unusual calcaneum morphology which resembles basal The haemal have stellate two sets projections comparable specimen MMCh-PV 47 from Candeleros (Cenomanian), described titanosaurian. analysis retrieves more closely related Zapalasaurus than Limaysaurinae. presence taxon at Turonian times, so close extinction group, implies evolutionary history rebbachisauridae complex thought.

Язык: Английский

Процитировано

6