Papers by Alexandre Liparini
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O estudo das estruturas osteológicas e da musculatura a estas relacionadas permite compreender, e... more O estudo das estruturas osteológicas e da musculatura a estas relacionadas permite compreender, em animais extintos, a evolução dos traços associados aos seus hábitos locomotores, especialmente se este estudo considerar os seus representantes atuais, a ...
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Um esqueleto parcialmente completo e semi-articulado de um rauissuquídeo, proveniente de níveis p... more Um esqueleto parcialmente completo e semi-articulado de um rauissuquídeo, proveniente de níveis pertencentes à Cenozona de Therapsida (Mesotriássico) da Formação Santa Maria, foi coletado em 2003, no município de Dona Francisca, RS, Brasil. Neste espécime ...
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Geological Society, London, Special Publications, 2013
ABSTRACT Prestosuchus chiniquensis is an extinct species of terrestrial archosaur from the Middle... more ABSTRACT Prestosuchus chiniquensis is an extinct species of terrestrial archosaur from the Middle Triassic Epoch restricted to southern Brazil. In this paper the thigh musculature of P. chiniquensis is reconstructed based on a well-preserved specimen and on myological descriptions of extant birds and crocodylians. Among the 16 analysed muscular groups, 13 were recognized as present and homologous to both extant groups of archosaurs, and two only to the crocodylian line of archosaurs, so that 15 muscular groups were reconstructed in the fossil specimen. Morphological particularities of the pelvic girdle and the hindlimbs of P. chiniquensis gave a distinct arrangement for the muscular origin and insertion sites, leading to different lines of action and functions when compared with extant archosaurs. The comparison between extinct and extant archosaurs showed a basal condition sustained in some aspects, such as the morphology of the femur and the flexion of the knee, although other aspects were considered as derived, such as the morphology of the pubis and ischium, and their associated muscle origin locations.
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Clinical Chemical Laboratory Medicine, 2000
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Analytical and Bioanalytical Chemistry, 2007
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Alcheringa: An Australasian Journal of Palaeontology, 2013
ABSTRACT Exaeretodon riograndensis Abdala, Barberena, & Dornelles, 2002 is the most abund... more ABSTRACT Exaeretodon riograndensis Abdala, Barberena, & Dornelles, 2002 is the most abundant traversodontid preserved in the basal Santa Maria 2 Sequence (Hyperodapedon Assemblage Zone), southern Brazil and is closely related to Exaeretodon argentinus Cabrera, 1943from the Ischigualasto Formation, Argentina. Previous anatomical studies of E. riograndensis have focused mainly on cranial material and little is known about the morphology of its lower dentition or postdentary bones. We describe the first fairly complete postdentary series of the mandible of E. riograndensis and provide additional information on its lower dentition. The postdentary bones of E. riograndensis include a complex coronoid, an angular with a delicate reflected lamina and a stout retroarticular process of the articular, contrasting with the morphology reconstructed for Argentinean specimens, which possess a small retroarticular process. Apart from that, the postdentary bones do not differ significantly from those known for E. argentinus, a fact expected due to the great similarity between other skeletal features of these species. Furthermore, the lower postcanines of E. riograndensis have virtually the same structure as those of E. argentinus, with an approximate quadrangular shape in occlusal view. Moreover, the transverse cusp row is placed anteriorly and comprises a lingual and a buccal cusp, and the occlusal basin delimited by the four main cusps is relatively deep. The new material does not add any taxonomically diagnostic features to E. riograndensis. However, the fossils greatly improve our understanding of the anatomy of the Brazilian species.
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We present a radiocarbon date (12,742e12,562 cal BP) for an "Eremotherium laurillardi" tooth foun... more We present a radiocarbon date (12,742e12,562 cal BP) for an "Eremotherium laurillardi" tooth found in Sergipe state, northeastern Brazil, which shows anthropogenic marks. Our result provides additional information and reinforces the hypothesis that humans was present in South America earlier than accepted currently, and interacted with megafauna during the late Pleistocene in this region.
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Papers by Alexandre Liparini