Results 1 to 10 of about 1,823 (231)

Complete mitochondrial genome of the river stingray Potamotrygon orbignyi (Myliobatiformes: Potamotrygonidae) [PDF]

Mitochondrial DNA. Part B. Resources, 2019
The river stingray Potamotrygon orbignyi is a carnivorous bottom feeder that is widespread in the Amazonian region. We here assemble the 17,449 bp complete mitochondrial genome of the species, showing a typical gene arrangement as for related ...
David Ory, Yves Cuenot, Régis Vigouroux, Raphaël Covain, Sébastien Brosse, Jérôme Murienne   +5 more
doaj   +8 more sources

Diversity and ecological relationships of Cestoda and Monogenoidea parasites of freshwater stingrays (Myliobatiformes, Potamotrygonidae), in the upper Paraná River, Brazil [PDF]

International Journal for Parasitology: Parasites and Wildlife
The Neotropical freshwater stingrays of Potamotrygon genus present a unique and complex natural history and biogeographical pattern that can be traced to a marine origin and the colonization of the continental environment during the Miocene.
Jumma Miranda Araújo Chagas, Douglas de Castro Ribeiro, Thalita Fischer Santini Mendes, Felipe Chinaglia Montefeltro, Luciano Alves dos Anjos   +4 more
doaj   +4 more sources

Venom gland transcriptome analyses of two freshwater stingrays (Myliobatiformes: Potamotrygonidae) from Brazil. [PDF]

Sci Rep, 2016
Stingrays commonly cause human envenoming related accidents in populations of the sea, near rivers and lakes. Transcriptomic profiles have been used to elucidate components of animal venom, since they are capable of providing molecular information on the
de Oliveira Júnior NG, Fernandes Gda R, Cardoso MH, Costa FF, Cândido Ede S, Garrone Neto D, Mortari MR, Schwartz EF, Franco OL, de Alencar SA.   +9 more
europepmc   +8 more sources

Two new species of freshwater stingrays of the genus Paratrygon (Chondrichthyes: Potamotrygonidae) from the Orinoco basin, with comments on the taxonomy of Paratrygon aiereba [PDF]

Neotropical Ichthyology, 2021
The genus Paratrygon, currently recognized as the sole monotypic genus of the family Potamotrygonidae, has a considerably greater diversity than previously indicated, including molecular studies, which supported P.
Thiago Silva Loboda, Carlos A. Lasso, Ricardo de Souza Rosa, Marcelo Rodrigues de Carvalho   +3 more
doaj   +3 more sources

Distribution modelling for Neotropical freshwater stingrays Potamotrygon brachyura and Potamotrygon motoro (Myliobatiformes, Potamotrygonidae) in the Uruguay River basin [PDF]

Journal of Fish Biology, EarlyView.
Abstract This study aimed to identify geographical distribution patterns of the giant short‐tailed river stingray Potamotrygon brachyura and the motoro stingray Potamotrygon motoro in the Uruguay River basin. Data on presence/absence of stingrays were based on fishers' knowledge accessed by interviews through expeditions in Brazil, Argentina and ...
Danilo Araujo Soares Pereira, Roberto Esser dos Reis, Nelson Ferreira Fontoura   +2 more
wiley   +3 more sources

Mitochondrial DNA suggests Hybridization in Freshwater Stingrays Potamotrygon (POTAMOTRYGONIDAE: MYLIOBATIFORMES) from the Xingu river, Amazonia and reveals speciation in Paratrygon aireba [PDF]

Anais da Academia Brasileira de Ciências, 2021
In the Xingu river basin, Brazil, occurs two genera of Potamotrygonidae family: Potamotrygon and Paratrygon. In this region, the taxa have significant economic importance for the ornamental fishing industry, being intensively captured, especially the ...
DAMIRES SANCHES, THAIS MARTINS, ÍTALO LUTZ, IVANA VENEZA, RAIMUNDO DA SILVA, FELIPE ARAÚJO, JANICE MURIEL-CUNHA, IRACILDA SAMPAIO, MAGALI GARCIA, LEANDRO SOUSA, GRAZIELLE EVANGELISTA-GOMES   +10 more
doaj   +3 more sources

The evolutionary origin of the durophagous pelagic stingray ecomorph. [PDF]

Palaeontology, 2023
Abstract Studies of the origin of evolutionary novelties (novel traits, feeding modes, behaviours, ecological niches, etc.) have considered a number of taxa experimenting with new body plans, allowing them to occupy new habitats and exploit new trophic resources.
Marramà G, Villalobos-Segura E, Zorzin R, Kriwet J, Carnevale G.   +4 more
europepmc   +2 more sources

Testicular Morphology and Spermatogenesis in Potamotrygon motoro: Insights Into Reproduction of Freshwater Stingrays. [PDF]

J Morphol
Electron microscopy of Potamotrygon motoro spermatozoa. a – Illustration of a schematic sperm cell depicting the helical head, intermediate piece (midpiece), and flagellum. b ‐ Helical heads (Hh) of spermatozoa inserted into the cytoplasm of Sertoli cells (S) through openings in the plasma membrane. Scales: 10 μm.
Delgado MLR, Quirino PP, Gomes-Silva L, Dzyuba V, Dzyuba B, Ninhaus-Silveira A, Veríssimo-Silveira R.   +6 more
europepmc   +2 more sources

Draft Genome of White-blotched River Stingray Provides Novel Clues for Niche Adaptation and Skeleton Formation [PDF]

Genomics, Proteomics & Bioinformatics, 2023
The white-blotched river stingray (Potamotrygon leopoldi) is a cartilaginous fish native to the Xingu River, a tributary of the Amazon River system. As a rare freshwater-dwelling cartilaginous fish in the Potamotrygonidae family in which no member has ...
Jingqi Zhou, Ake Liu, Funan He, Yunbin Zhang, Libing Shen, Jun Yu, Xiang Zhang   +6 more
doaj   +2 more sources

A new species of Neotropical freshwater stingray of the genus Potamotrygon Garman, 1877 from the Río Madrede Díos, Peru (Chondrichthyes: Potamotrygonidae) [PDF]

Papéis Avulsos de Zoologia, 2011
Potamotrygon tatianae sp. nov., is described from Río Madre de Díos, Peru, upper Rio Madeira basin. The new species is distinguished from all congeners by a unique combination of characters, including its dorsal color pattern formed by a relatively ...
João Paulo C.B. da Silva, Marcelo R. de Carvalho   +1 more
doaj   +5 more sources