A comprehensive phylogenetic analysis on early ornithischian evolution

Journal of Systematic Palaeontology, Год журнала: 2024, Номер 22(1)

Опубликована: Июнь 21, 2024

Resolving the evolutionary relationships of early diverging ('basal') ornithischian dinosaurs is a challenging topic in palaeontology, with multiple competing hypotheses on phylogenetic heterodontosaurids, 'hypsilophodontids', and other early-diverging forms. These cannot be directly compared because they are derived from differently constructed datasets (i.e. distinct samples taxa characters). This study aims to address these issues by revising combining into single analysis order create most comprehensive dataset for investigation ornithischians. A diphyletic model Dinosauria supported, silesaurs nesting as members Ornithischia. Heterodontosauridae resolved clade non-genasaurian ornithischians, rejecting potential relationship Marginocephalia. 'Hypsilophodontid' span neornithischian ornithopod stem, Thescelosauridae sister taxon Cerapoda. more restricted Ornithopoda composed five main clades: Hypsilophodontidae, Rhabdodontomorpha, Elasmaria, Dryosauridae Ankylopollexia. Hypsilophodontidae valid clade, reduced two European Barremian taxa. Rhabdodontomorpha does not contain Muttaburrasaurus originally proposed, but instead expands include North American formed Convolosaurus, Iani Tenontosaurus. Elasmaria contains all non-dryomorph Gondwanan ornithopods, its possessing body plans. New results comparison previous studies suggest that some 'true dryosaurids' various euiguanodontians may closely related either or Results group 'hypsilophodontids' larger clades, significantly reducing number extension ghost lineages throughout Neornithischia. clades also show degree endemism, different present at continents Late Cretaceous. new unifying works will provide framework future origins relations attempting find stability among hypotheses.

Язык: Английский

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Triassic pterosaur precursors of Brazil: catalog, evolutionary context, and a new hypothesis for phylogenetic relationships of Pterosauromorpha

Anais da Academia Brasileira de Ciências, Год журнала: 2025, Номер 97(suppl 1)

Опубликована: Янв. 1, 2025

Abstract Pterosaurs, remarkable for their extensive evolutionary history and role as the first vertebrates to achieve active flight, have long intrigued paleontologists public alike. Spanning over 150 million years vanishing at end of Mesozoic Era, pterosaurs represent a major radiation within terrestrial ecosystems. Despite prominence, origins remained complex puzzle in paleontology 200 years. We present comprehensive catalog pterosaur precursors specimens from Upper Triassic Candelária Sequence Santa Maria Supersequence southern Brazil discuss significance understanding pterosauromorph Pterosauria. Additionally, we carried out phylogenetic analysis investigate hypothesis that lagerpetids are closely related pterosaurs, incorporating new data into most dataset dinosauromorphs. Our results support pterosauromorphs, offering insights relationships between non-pterosaur pterosauromorphs better known volant relatives. This study highlights importance detailed anatomical analyses resolving underscores value fossil record early evolution pterosauromorphs.

Язык: Английский

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Craniofacial lesions in the earliest predatory dinosaurs indicate intraspecific agonistic behaviour at the dawn of the dinosaur era

The Science of Nature, Год журнала: 2025, Номер 112(2)

Опубликована: Март 26, 2025

Язык: Английский

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The dawn of an Era: New contributions on comparative and functional anatomy of Triassic tetrapods

The Anatomical Record, Год журнала: 2024, Номер 307(4), С. 713 - 721

Опубликована: Фев. 12, 2024

Abstract The Triassic period stands as a crucial moment for understanding tetrapod evolution, marking the emergence and early diversification of numerous lineages that persist in today's ecosystems. Birds, crocodiles, testudines, lizards, mammals can all trace their origins to Triassic, which is distinguished by several adaptive radiation events fostered unparalleled diversity body plans lifestyles. Beyond this macroevolutionary significance, serves fertile ground scientific inquiry, especially studies. aim Special Issue assemble diverse array new contributions focused on continental tetrapods globally, encouraging collaboration among researchers across generations, pooling efforts comprehend pivotal evolutionary history. This issue encompasses almost 40 varied contributions, spanning topics from comparative functional anatomy, including descriptions novel taxa, comprehensive anatomical reviews, systematic investigations, phylogenetic analyses, paleoneurological studies, biomechanical assessments, detailed examinations histology ontogeny. Collectively, offers an extensive exploration anatomical, ecological, perspectives, unveiling fresh insights into intriguing vertebrate

Язык: Английский

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A new sympatric occurrence of lagerpetids (Pan-Aves, Pterosauromorpha) in the upper Triassic of southern Brazil

Journal of South American Earth Sciences, Год журнала: 2024, Номер 140, С. 104897 - 104897

Опубликована: Апрель 18, 2024

Язык: Английский

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Craniomandibular osteology and the first record of the ocular skeleton in a South American rhynchosaur (Archosauromorpha, Hyperodapedontinae)

Palaeoworld, Год журнала: 2024, Номер unknown

Опубликована: Июль 1, 2024

Язык: Английский

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New archosauromorph remains provide data on the age of a unique Late Triassic assemblage from southern Brazil

Journal of South American Earth Sciences, Год журнала: 2024, Номер 145, С. 105046 - 105046

Опубликована: Июль 31, 2024

Язык: Английский

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A new “silesaurid” from the oldest dinosauromorph-bearing beds of South America provides insights into the early evolution of bird-line archosaurs

Gondwana Research, Год журнала: 2024, Номер unknown

Опубликована: Сен. 1, 2024

Язык: Английский

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Triassic climate and the rise of the dinosaur empire in South America

Journal of South American Earth Sciences, Год журнала: 2024, Номер 142, С. 104977 - 104977

Опубликована: Июнь 5, 2024

Язык: Английский

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Paleoenvironmental and Paleoecological reconstruction of Santa Maria Supersequence units (Middle to Late Triassic, Brazil) based on stable isotope data: Influence of the Carnian Pluvial Episode

Chemical Geology, Год журнала: 2024, Номер unknown, С. 122589 - 122589

Опубликована: Дек. 1, 2024

Язык: Английский

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