Results 41 to 50 of about 332 (154)
Rivista Italiana di Paleontologia e Stratigrafia, 2022 The enigmatic marine reptile Helveticosaurus zollingeri, from the Middle Triassic Besano Formation of Monte San Giorgio, is known from three specimens found in Swiss territory. This paper describes the first skeletal remains of this taxon recovered from
Gabriele Bindellini, CRISTIANO DAL SASSO
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Rhynchocephalians (Diapsida: Lepidosauria) from the Jurassic Kota Formation of India [PDF]
Zoological Journal of the Linnean Society, 2001 Despite their rarity today, rhynchocephalians formed a diverse Early Mesozoic clade with a comparatively good fossil record. They had a Pangaean distribution in the Late Triassic and Early Jurassic, although the Gondwanan record remains more limited than the Laurasian one. We report here on new sphenodontian material from the Jurassic Kota Formation of
S. E. EVANS +2 more
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Papéis Avulsos de Zoologia, 2011 La proporción entre el segundo y cuarto dígito (2D/4D) ha sido bien estudiada como un dimorfismo sexual que puede resultar de los efectos androgénicos prenatales sobre la expresión de los genes homeobox.
Mauricio Peñuela
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First records of diapsid Palacrodon from the Norian, Late Triassic Chinle Formation of Arizona, and their biogeographic implications [PDF]
Acta Palaeontologica Polonica, 2018 Vertebrates from the Triassic Period have broadly disparate tooth shapes and dentition patterns, the result of intense morphospace experimentation following the Permo-Triassic extinction.
Ben T. Kligman +2 more
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Molecular anatomy of emerging Xenopus left-right organizer at successive developmental stages. [PDF]
Dev DynAbstract Background Vertebrate left–right symmetry breaking is preceded by formation of left–right organizer. In Amphibian, this structure is formed by gastrocoel roof plate, which emerges from superficial suprablastoporal cells. GRP is subdivided into medial area, which generates leftward flow by rotating monocilia and lateral Nodal1 expressing areas,
Petri N +3 more
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A new phylogeny of ichthyosaurs (Reptilia: Diapsida) [PDF]
Journal of Systematic Palaeontology, 2017 The largest phylogenetic analysis of ichthyosaurs to date is presented, with 114 ingroup taxa coded at species level. Completeness of the taxa included varied from > 98% to < 2%; 10 taxa were removed a priori using Concatabominations due to incompleteness and taxonomic uncertainty.
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Osteohistology of hyperodapedontine rhynchosaurs from the Upper Triassic of Southern Brazil [PDF]
Acta Palaeontologica Polonica, 2015 The first osteohistological study focused exclusively on rhynchosaurs (non-archosauriform archosauromorphs), based on the hyperodapedontines Teyumbaita sulcognathus and Hyperodapedon sp., from the Upper Triassic of Southern Brazil, indicates a relatively
Fábio Hiratsuka Veiga +2 more
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A new archosauriform (Reptilia: Diapsida) from the Manda beds (Middle Triassic) of southwestern Tanzania. [PDF]
PLoS ONE, 2013 BackgroundArchosauria and their closest relatives, the non-archosaurian archosauriforms, diversified in the Early and Middle Triassic, soon after the end-Permian extinction. This diversification is poorly documented in most Lower and Middle Triassic rock
Sterling J Nesbitt +2 more
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Intraorganismal Homology, Character Construction, and the Phylogeny of Aetosaurian Archosaurs (Reptilia, Diapsida) [PDF]
Systematic Biology, 2003 Character construction, the methods by which characters and character states are produced from observations of variation, is a crucial but poorly understood step in phylogenetic analysis. Alternative approaches are used in practice, but there has been relatively little investigation of their theoretical bases and analytical consequences.
Harris, SR, Gower, David J, Wilkinson, M
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Rivista Italiana di Paleontologia e Stratigrafia, 2023 Discovery of two different morphologies of the hindlimb in specimens ascribed to the Triassic drepanosauromorph diapsid Megalancosaurus led to the erection of two distinct species within this genus: M. preonensis and M. endennae.
Silvio Renesto, FRANCO SALLER
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