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A dinosaur ilium from the Late Triassic of Brazil with comments on key-character supporting Saturnaliinae Anais da ABC (AABC)
GARCIA,MAURÍCIO S.; PRETTO,FLÁVIO A.; DIAS-DA-SILVA,SÉRGIO; MÜLLER,RODRIGO T..
Abstract: Discoveries in Carnian-aged rocks are establishing a rich and diverse dinosaurian fauna at the so-called ‘dawn of the age of dinosaurs’ in the Late Triassic of Western Gondwana. Accordingly, Brazilian strata from the Candelária Sequence have contributed extensively to this trend. Here, we present a new dinosaurian specimen (CAPPA/UFSM 0200) from this geological unit. The material was collected at a fossiliferous site that had no previous record of dinosaurs. Our specimen comprises a single ilium, which we describe in detail. Its anatomy is consistent with Carnian sauropodomorph dinosaurs, but differs from coeval specimens by several features, although we do not discard the possibility of these features being the result of intraspecific variation....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Intraspecific variation; Saurischia; Sauropodomorpha; Upper Triassic; Western Gondwana.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400516
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On the presence of the subnarial foramen in Prestosuchus chiniquensis (Pseudosuchia: Loricata) with remarks on its phylogenetic distribution Anais da ABC (AABC)
ROBERTO-DA-SILVA,LÚCIO; FRANÇA,MARCO A.G.; CABREIRA,SÉRGIO F.; MÜLLER,RODRIGO T.; DIAS-DA-SILVA,SÉRGIO.
ABSTRACT Many authors have discussed the subnarial foramen in Archosauriformes. Here presence among Archosauriformes, shape, and position of this structure is reported and its phylogenetic importance is investigated. Based on distribution and the phylogenetic tree, it probably arose independently in Erythrosuchus, Herrerasaurus, and Paracrocodylomorpha. In Paracrocodylomorpha the subnarial foramen is oval-shaped, placed in the middle height of the main body of the maxilla, and does not reach the height of ascending process. In basal loricatans from South America (Prestosuchus chiniquensis and Saurosuchus galilei) the subnarial foramen is 'drop-like' shaped, the subnarial foramen is located above the middle height of the main body of the maxilla, reaching...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Archosauria; Extra cranial opening; Santa Maria Formation; Brazil.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401309
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