Results 31 to 40 of about 362,357 (213)

Inside a duck‐billed dinosaur: Vertebral bone microstructure of Huallasaurus (Hadrosauridae), Upper Cretaceous of Patagonia

The Anatomical Record, EarlyView.
Abstract Dinosaurs evolved a unique respiratory system with air sacs that contributed to their evolutionary success. Postcranial skeletal pneumaticity (PSP) has been used to infer the presence of air sac systems in some fossil archosaurs. While unambiguous evidence of PSP is well documented in pterosaurs and post‐Carnian saurischians, it remains absent
Tito Aureliano, Aline M. Ghilardi, Jonatan Kaluza, Agustín G. Martinelli   +3 more
wiley   +1 more source

Growth dynamics, skeletochronology, and histovariability of the theropod dinosaur Berthasaura leopoldinae

The Anatomical Record, EarlyView.
Osteohistological sampling on different bones of theropod dinosaur documents discrepant age record, growth, and metabolism. This could result unprecise paleobiological inferences if samplings are based on single bones. However, multi‐bone sampling can attenuate these discrepancies, helping to infer growth dynamics and physiology of these extinct ...
Geovane Alves de Souza, Marina Bento Soares, Luiz Carlos Weinschütz, Alexander Wilhelm Armin Kellner   +3 more
wiley   +1 more source

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

The Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro, Jeffrey A. Wilson Mantilla, Jhonata H. A. Martins, Fabiano V. Iori, Leonardo S. Paschoa, Alberto B. Carvalho, Joseli M. Piranha, Hussam Zaher   +7 more
wiley   +1 more source

Estatísticas descritivas de séries de vazão e cota fluviométrica: caracterização hidrológica do alto rio Paraná pós-barragem de Porto Primavera

GeoTextos
Este estudo apresenta uma análise estatística detalhada das séries históricas de vazão e cota fluviométrica do alto rio Paraná, obtidas na estação Porto São José (ANA), entre 1999 e 2019. O objetivo foi caracterizar a variabilidade hidrológica interanual
Alisson Santori, José Cândido Stevaux, Isabel Terezinha Leli   +2 more
doaj   +1 more source

La vegetación reófila del Nordeste argentino. Las comunidades vegetales con Podostemaceae de la Provincia de Misiones

Boletín de la Sociedad Argentina de Botánica, 2014
En la provincia de Misiones, comunidades vegetales con Podostemáceas viven en rápidos y saltos de los arroyos pertenecientes a dos cuencas (Ríos Paraná y Uruguay).
José Luis Fontana
doaj   +1 more source

Pimelodus heraldoi Azpelicueta, 2001, a junior synonym of Pimelodus microstoma Steindachner, 1877 (Siluriformes: Pimelodidae)

Neotropical Ichthyology
The examination of the holotype and 61 of the 64 paratypes of Pimelodus heraldoi, syntypes of P. microstoma and additional specimens from the upper rio Paraná showed that the former species is a junior synonym of the latter.
Frank Raynner V Ribeiro, Carlos Alberto S Lucena   +1 more
doaj   +1 more source

Modelagem hidrodinâmica do canal do rio Paraná, trecho Porto São José - Porto 18. Parte I: Caracterização física do canal

Acta Scientiarum: Technology, 1999
Os estudos ambientais na Planície de Inundação do rio Paraná, na região de Porto Rico, necessitam dos dados fluviométricos do rio Paraná, no trecho Porto São José - Porto 18, os quais devem ser fornecidos por meio de um modelo matemático hidrodinâmico ...
Astrid Meira Martoni, Roberto Cruz Lessa
doaj   +1 more source

Age and growth of Zapteryx brevirostris (Elasmobranchii: Rhinobatidae) in southern Brazil [PDF]

, 2018
Age and growth studies are fundamental to successful fisheries management. Zapteryx brevirostris (Muller & Henle, 1841) is distributed off the Brazilian continental shelf and this species is assessed as "Vulnerable" in the Red List of the International ...
Carmo, Wanessa P. D., Coelho, Rui, Favaro, Luis Fernando   +2 more
core   +4 more sources

School Climate, Absenteeism and School Transfer Due to Transphobic Bullying in Transgender And Non‐Binary Youth

Journal of Adolescence, EarlyView.
ABSTRACT Introduction This study investigates the critical role of school climate in relation to absenteeism and school transfer due to transphobic bullying among transgender and gender non‐binary youth in Brazil, a context where research on this population is scarce.
Anna Martha Vaitses Fontanari, Marina Feijó, Anna Paula Villas‐Boas, Guilherme Welter Wendt, Angelo Brandelli Costa   +4 more
wiley   +1 more source

Seven new species of the killifish genus Rivulus (Cyprinodontiformes: Rivulidae) from the Paraná, Paraguay and upperAraguaia river basins, central Brazil

Neotropical Ichthyology
Seven new species of the Rivulus punctatus group collected during recent field studies in central Brazil are described. Rivulus dapazi n. sp., from the upper rio Correntes drainage, rio Paraguay basin, is diagnosed by a unique color pattern of the anal ...
Wilson J. E. M. Costa
doaj   +1 more source