Results 221 to 230 of about 1,823 (231)

Functional Morphology of the Gill in Amazonian Freshwater Stingrays (Chondrichthyes: Potamotrygonidae): Implications for Adaptation to Freshwater

Physiological and Biochemical Zoology, 2010
The gill morphologies of six species of potamotrygonid freshwater stingrays from the Amazon basin were investigated using light and electron microscopy. Some unique features were found in the potamotrygonid gill: (1) fingerlike protuberances on the gill filament, (2) an Alcian blue/periodic acid-Schiff-positive histochemical reaction for several cell ...
Wallice Paxiúba, Duncan, Oscar Tadeu Ferreira, da Costa, Marise Margareth, Sakuragui, Marisa Narciso, Fernandes   +3 more
openaire   +2 more sources

Follicular growth and sex steroids in adult females of the endemic Amazonian freshwater stingray Potamotrygon wallacei (Chondrichthyes, Potamotrygonidae)

Environmental Biology of Fishes, 2021
Ruben Dario Morales-Gamba, M. L. G. de Araújo, J. F. Barcellos, J. Marcon   +3 more
semanticscholar   +1 more source

Feeding habits and ecological role of the freshwater stingray Potamotrygon magdalenae (Duméril 1865) (Myliobatiformes: Potamotrygonidae), combining gut-content and stable isotope analysis

Environmental Biology of Fishes, 2019
V. Márquez-Velásquez, R. Rosa, E. Galindo, A. Navia   +3 more
semanticscholar   +1 more source

Cross-reactivity between Potamotrygon motoro antivenoms and dorsal and stinger extracts of others stingrays (Chondrichthyes: Potamotrygonidae) from the Amazon basin

, 2019
J. Lameiras, Valéria Mourão de Moura, L. C. Dias, Ilia Gilmara Carvalho dos Santos, O. D. Costa, M. C. Dos-Santos   +5 more
semanticscholar   +1 more source

A new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the smallest species of Potamotrygon.

Zootaxa, 2016
M. R. Carvalho, R. Rosa, M. Araújo
semanticscholar   +1 more source

Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography

, 2017
J. P. Fontenelle, M. R. Carvalho
semanticscholar   +1 more source

Angular cartilage structure and variation in Neotropical freshwater stingrays (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with comments on their function and evolution

, 2018
J. P. Fontenelle, T. S. Loboda, Matthew A. Kolmann, M. R. Carvalho   +3 more
semanticscholar   +1 more source

Molecular systematics of the freshwater stingrays (myliobatiformes: potamotrygonidae) of the Amazon, Orinoco, Magdalena, Esequibo, Caribbean, and Maracaibo basins (Colombia – Venezuela): evidence from three mitochondrial genes

Mitochondrial DNA. Part A, DNA mapping, sequencing, and analysis, 2016
D. A. Garcia, C. Lasso, M. Morales, S. Caballero   +3 more
semanticscholar   +1 more source

[Lesions produced by Potamotrygonidae in Venezuelan rivers].

Dermatologia internationalis, 1968
openaire   +1 more source

Erratum: Plesiotrygon iwamae, a New Genus and Species of Neotropical Freshwater Stingray (Chondrichthyes: Potamotrygonidae)

Copeia, 1987
openaire   +1 more source