Results 111 to 120 of about 269 (143)

Evolution of the Side-Necked Turtles: The Family Podocnemididae

Bulletin of the American Museum of Natural History, 2011
Abstract The family Podocnemididae consists of 20 genera and 30 species considered here as valid and diagnosable by cranial characters. Three of these genera and eight species persist into the Recent fauna, barely reflecting the evolutionary diversity and distribution of the group. The family extends from the Late Cretaceous to the Recent and occurs in
Peter Meylán, Eugene S Gaffney
exaly   +2 more sources

Caninemys, A New Side-Necked Turtle (Pelomedusoides: Podocnemididae) from The Miocene of Brazil [PDF]

American Museum Novitates, 2009
Abstract A new genus and species of podocnemidid pleurodire, Caninemys tridentata, is described on the basis of a skull collected by L.I. Price in 1962 from the late Miocene of Acre, Brazil. It is unique among podocnemidids (and all other turtles) in having greatly inflated maxillae, each with a ventral, toothlike process.
Peter Meylán, Eugene S Gaffney
exaly   +2 more sources

Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae) [PDF]

Iheringia - Serie Zoologia, 2011
This study has been carried out at the central region of the Araguaia river on the border between the states of Goiás and Mato Grosso in the Brazilian Amazon Basin from September to December 2000. We recorded temperature fluctuation, clutch-size, incubation period and hatching success rate and hatchlings' sex ratio of five nests of Podocnemis expansa ...
Adriana Malvasio, Luciano M Verdade, Verdade Luciano M   +2 more
exaly   +5 more sources

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Morphology of the Digestive Tube of the Podocnemididae in the Brazilian Amazon

Herpetologica, 2014
Abstract:  We describe the morphology of the digestive tube of Podocnemis expansa, Podocnemis unifilis, Podocnemis sextuberculata, Podocnemis erythrocephala, and Peltocephalus dumerilianus. The esophagus in these species has two distinct regions: the anterior region has esophageal papillae and the posterior has longitudinal folds. Esophageal glands are
Magalhães, M. S., Vogt, Richard Carl, Barcellos, José Fernando Marques, Moura, Carlos Eduardo Bezerra, Silveira, Ronis da   +4 more
openaire   +2 more sources

Nesting Ecology of Podocnemis erythrocephala (Testudines, Podocnemididae) of the Rio Negro, Amazonas, Brazil

Chelonian Conservation and Biology, 2008
ABSTRACT We studied reproductive ecology and egg survivorship of Podocnemis erythrocephala (Spix 1824) in 4 campina habitats on the Ayuana River, Santa Isabel do Rio Negro, Amazonas, Brazil. There were 2 nesting periods, the first in early October and the other in the beginning of December, separated by a period of flash floods.
Richard Vogt
exaly   +3 more sources

Prevalence and parasitemia of Haemogregarina sp. in Podocnemis expansa (Testudines: Podocnemididae) from the Brazilian Amazon [PDF]

Brazilian Journal of Veterinary Parasitology, 2015
Seventy-five turtles Podocnemis expansa in the Brazilian Amazon were examined for the presence of ectoparasites and hemoparasites. Samplings were performed in three study areas in the state of Tocantins, Brazil. Twenty-five specimens were sampled per study area (a commercial breeding facility, an indigenous subsistence breeding facility and a wild ...
Amanda Picelli, Adriana Malvasio, Lucio Viana   +2 more
exaly   +6 more sources

Effects of the exposure to atrazine on bone development of Podocnemis expansa (Testudines, Podocnemididae)

Ecotoxicology, 2016
The use of pesticides is a widely spread practice in Brazilian agriculture, and dispersion of these substances is an important factor for the fauna and flora. Atrazine is an endocrine disruptor in the xenoestrogen class that is used worldwide in agricultural practices. In Brazil, its use is permitted in several crops.
Juliana dos Santos, Mendonça, Lucélia Gonçalves, Vieira, Sady Alexis Chavauty, Valdes, Franz Zirena, Vilca, Valdemar Luiz, Tornisielo, André Luiz Quagliatto, Santos   +5 more
openaire   +2 more sources

Characterization of the complete mitochondrial genome of Podocnemis expansa (Pleurodira: Podocnemididae)

Conservation Genetics Resources, 2017
The Arrau River turtle (Podocnemis expansa) is one of the largest side-neck turtles which listed as an endangered species in IUCN red list. In this study, the complete mitochondrial genome of P. expansa was determined by the sequencing of PCR fragments. The complete mitochondrial genome of P.
Kangyu Wang, Li Li, Shaokun Li, Honghua Sun, Guiqi Bi   +4 more
openaire   +1 more source

Heart morphology during the embryonic development of Podocnemis unifilis Trosquel 1948 (Testudines: Podocnemididae)

The Anatomical Record, 2022
AbstractCardiogenesis is similar in all vertebrates, but differences in the valvuloseptal morphogenesis among non‐crocodilian reptiles, birds, and mammals are noted. The origin of mesenchymal structures such as valves that regulate the passage of blood and the formation of partial septa that prevent the complete mixing of oxygen‐rich and low‐oxygen ...
Layla Ianca Queiroz Rocha, Maria Fabiele da Silva Oliveira, Lucas Castanhola Dias, Moacir Franco de Oliveira, Carlos Eduardo Bezerra de Moura, Marcela dos Santos Magalhães   +5 more
openaire   +2 more sources

Feeding Habits of Amazonian Freshwater Turtles (Podocnemididae and Chelidae) from Peru

Chelonian Conservation and Biology, 2013
Abstract We describe here the feeding habits of the Yellow-spotted River turtle (Podocnemis unifilis) (n  =  20), Geoffroy's side-necked turtle (Phrynops geoffroanus) (n  =  10), and Gibba turtle (Mesoclemmys gibba) (n  =  4) from central Peru, Pasco Department, and evaluate food overlaps among them.
Bruno de Oliveira Ferronato, Carlos Ignacio Piña, Freddy Cochachez Molina, Renato A. Espinosa, Víctor R. Morales   +4 more
openaire   +1 more source