Cretaceous Research, Journal Year: 2024, Volume and Issue: unknown, P. 106075 - 106075
Published: Dec. 1, 2024
Language: Английский
Nature, Journal Year: 2023, Volume and Issue: 620(7974), P. 589 - 594
Published: Aug. 16, 2023
Dinosaurs and pterosaurs have remarkable diversity disparity through most of the Mesozoic Era1–3. Soon after their origins, these reptiles diversified into a number long-lived lineages, evolved unprecedented ecologies (for example, flying, large herbivorous forms) spread across Pangaea4,5. Recent discoveries dinosaur pterosaur precursors6–10 demonstrated that animals were also speciose widespread, but those precursors few if any well-preserved skulls, hands associated skeletons11,12. Here we present partial skeleton (Upper Triassic, Brazil) new lagerpetid Venetoraptor gassenae gen. et sp. nov. offers more comprehensive look skull ecology one precursors. Its has sharp, raptorial-like beak, preceding dinosaurs by around 80 million years, hand with long, trenchant claws firmly establishes loss obligatory quadrupedalism in precursor lineages. Combining anatomical information species other shows morphological resembles Triassic exceeds dinosaurs. Thus, 'success' was result differential survival among broader pool ecomorphological variation. Our results show ornithodirans started to flourish early-diverging lineages not only origins pterosaurs. A
Language: Английский
Citations
27
The Anatomical Record, Journal Year: 2024, Volume and Issue: unknown
Published: March 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.
Language: Английский
Citations
9
Historical Biology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 42
Published: April 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.
Language: Английский
Citations
7
Proceedings of the Royal Society B Biological Sciences, Journal Year: 2024, Volume and Issue: 291(2023)
Published: May 1, 2024
The noasaurid ceratosaur Kiyacursor longipes gen. et sp. nov. is described based on a fragmentary skeleton including cervical vertebra, pectoral girdle, humerus and hind limbs from the Lower Cretaceous (Aptian) Ilek Formation at Shestakovo 1 locality in Western Siberia, Russia. This first Early of Asia, extending stratigraphic range Ceratosauria by 40 Myr that continent. shares unique limb proportions with Elaphrosaurus Limusaurus , suggesting improved cursorial ability. These taxa show an ostrich-like specialization pes, large third metatarsal greatly reduced second metatarsal. By contrast, all other fast running non-avian theropod dinosaurs have arctometatarsalian strongly proximally. new taxon lived ecosystem containing number Jurassic relics, such as stem salamanders, protosuchian shartegosuchid crocodyliforms, tritylodontid synapsids docodontan mammaliaforms.
Language: Английский
Citations
5
Historical Biology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 22
Published: June 10, 2024
The Caiuá Group (Cretaceous of Southern Brazil) is famous for the Pterosaur Graveyard site, a location that has yielded hundreds tapejarid specimens, among other taxa. Previous works had already presented various specimens (PG) tapejarids, reporting on several cranial elements showing substantial anatomical variations. These variations have been interpreted as intraspecific in nature, with all having attributed to single species, Caiuajara dobruskii. present contribution reassesses morphological diversity found PG specimens. Evidence provided interpretation interspecific particularly regarding rostral, palatal, occipital, and third cervical morphology. data indicate segregation between two consistent morphotypes, which are here distinct, coexisting species: dobruskii Torukjara bandeirae gen. et sp. nov.
Language: Английский
Citations
5
Annals of Carnegie Museum, Journal Year: 2025, Volume and Issue: 90(3)
Published: Jan. 10, 2025
Megaraptorans are medium- to large-bodied tetanuran theropod dinosaurs known from Cretaceous deposits in Asia, Australia, and especially South America. The megaraptoran skeleton is far well known, the humerus one of least-frequently preserved elements. Here we describe first-documented adult a American megaraptoran, recovered Upper (Turonian–Coniacian) Portezuelo Formation Neuquén Basin on southeast coast Lago Barreales Province, northern Patagonia, Argentina. referred namesake Megaraptor namunhuaiquii Novas, 1998, based its geographic stratigraphic provenance as morphological similarity corresponding element juvenile same taxon. Nevertheless, new exhibits osteological distinctions that interpret reflective their differing ontogenetic stages. We also highlight anatomical differences between M. enigmatic Patagonian Gualicho shinyae Apesteguía et al., 2016, show these taxa not closely related.
Language: Английский
Citations
0
Bulletin of the Peabody Museum of Natural History, Journal Year: 2025, Volume and Issue: 66(1)
Published: April 25, 2025
Language: Английский
Citations
0
Derbyana, Journal Year: 2022, Volume and Issue: 43
Published: Dec. 31, 2022
The Bauru Basin bears one of the best sampled tetrapod paleofaunas Brazil, with about 70% this diversity collected from its deposits in São Paulo. Its fossils are known since beginning 20th century, coming all stratigraphic units cropping-out state, i.e., Santo Anastácio, Araçatuba, Adamantina (alternatively divided into Vale do Rio Peixe, Presidente Prudente, and José Preto formations), Marília formations. Identified taxa include rare anurans, mammals, squamates, an important set testudines, theropods (including birds), sauropods, addition to most diverse crocodyliform faunas worldwide. This congregates more than fifty unique taxonomic entities, including 42 formally described species. Based on biostratigraphic correlations tetrapods), few absolute ages, other sources evidence, Paulo seem be chronologically restricted Late Cretaceous, but further investigation is much needed. Finally, history research such highlights importance public funding for decentralization university education advancement science.
Language: Английский
Citations
14
Historical Biology, Journal Year: 2023, Volume and Issue: 36(10), P. 2019 - 2034
Published: Aug. 8, 2023
ABSTRACTDinosaur fossils are commonly found in Brazilian Mesozoic strata, with teeth being frequently Cretaceous outcrops. Many studies have been made the aim of reviewing known diversity dinosaurs, mostly focusing solely on their palaeobiogeography. However, few tried to typify these body order see which kinds were most prevalent fossil record. This study aims count and identify all occurrences non-avian dinosaur (isolated or situ) unearthed from strata objectively measure representativity national Our literature search showed that almost half record Brazil is composed by teeth, those particularly abundant Alcântara, Adamantina Marília formations. Theropod more comparison sauropod spinosaurids, deinonychosaurs, abelisaurids amply found. Despite representing a large share record, only recently studied depth, many specimens reassessed through current identification methods. Other aspects besides primary taxonomic can also be further explored using latest technologies allowing deeper understanding palaeobiology reptiles.KEYWORDS: TeethBrazilCretaceousDinosauriareview AcknowledgmentsThe authors would like thank researchers students who collaborated obtaining articles abstracts used for this study. We two anonymous reviewers, Prof. Carlos Roberto dos Anjos Candeiro Maria Alice Santos Alves comments suggested improvement manuscript. work was supported [Fundação de Amparo à Pesquisa do Estado Rio Janeiro] under Grants [E 04 E-26/204.053/2022 TBR; PDR10 E-26/201.995/2020 PVLGCP. PMB partially Conselho Nacional Desenvolvimento Cientifico e Tecnologico [#305118/2021-8] Fundação Janeiro [#E-26/201.172/2022].Disclosure statementNo potential conflict interest reported author(s).Supplemental dataSupplemental data article accessed online at https://doi.org/10.1080/08912963.2023.2238965.Additional informationFundingThe Chagas Filho [#E-26/201.172/2022 #PDR10 E-26/201.995/2020]; [#305118/2021-8].
Language: Английский
Citations
7
PLoS ONE, Journal Year: 2024, Volume and Issue: 19(7), P. e0278737 - e0278737
Published: July 30, 2024
Despite making up one of the most ecologically diverse groups living birds, comprising soaring, diving and giant flightless taxa, evolutionary relationships ecological evolution Anseriformes (waterfowl) remain unresolved. Although have a comparatively rich, global Cretaceous Paleogene fossil record, morphological datasets for this group that include extinct taxa report conflicting all known taxa. Correct placement is necessary to understand whether ancestral anseriform feeding ecology was more terrestrial or set aquatic ecologies better avian around K-T boundary. Here, we present new dataset includes extant than any previous anseriform-focused describe species from early Eocene Green River Formation North America. The taxon has mediolaterally narrow bill which rarely found in previously described fossils. matrix created assess comprises 41 719 discrete characters describing skeletal morphology, musculature, syringeal ecology, behavior. We additionally combine with published sequences using Bayesian methods perform state reconstruction select morphological, behavioral characters. recover as sister (Anseranatidae+Anatidae) across analyses, find represents novel within Results provide insight into during following K-Pg mass extinction indicate were likely ancestrally herbivores rhamphothecal lamellae..
Language: Английский
Citations
2