Results 61 to 70 of about 414 (162)
Biological Reviews, Volume 101, Issue 3, Page 1406-1462, June 2026.ABSTRACT Oropharyngeal food processing exhibits a remarkable diversity among vertebrates, reflecting the evolution of specialised ‘processing centres’ associated with the mandibular, hyoid, and branchial arches. Although studies have detailed various food‐processing strategies and mechanisms across vertebrates, a coherent and comprehensive terminology ...
Daniel Schwarz +6 more
wiley +1 more source
Neotropical IchthyologyThe family Potamotrygonidae is monophyletic comprising three genera: Paratrygon Duméril, Potamotrygon Garman and Plesiotrygon Rosa, Castello & Thorson.
Renata G. Frederico +4 more
doaj +1 more source
Electroreception in the obligate freshwater stingray, Potamotrygon motoro [PDF]
Marine and Freshwater Research, 2015 Elasmobranch fishes use electroreception to detect electric fields in the environment, particularly minute bioelectric fields of potential prey. A single family of obligate freshwater stingrays, Potamotrygonidae, endemic to the Amazon River, demonstrates morphological adaptations of their electrosensory system due to characteristics of a high impedance
Lindsay L. Harris +2 more
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Beyond Hard Parts: Metabarcoding Advances Dietary Resolution in Threatened Amazonian Elasmobranchs
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.ABSTRACT Elasmobranchs are highly vulnerable and are considered one of the most threatened vertebrates worldwide. Insights into diet can improve conservation measures. The bias of traditional morphological methods towards taxa with distinctive hard parts makes metabarcoding analysis a complementary tool to assess diet composition. Here, we analysed the
Alan Érik S. Rodrigues +11 more
wiley +1 more source
A new species of freshwater stingray (Myliobatiformes: Potamotrygoninae) from northern South America
Neotropical IchthyologyA new species of freshwater stingray (Potamotrygoninae) is described from the Demerara River, Guyana and río Guanare, Venezuela. It is distinguished from all other regional congeneric taxa (i.e., Potamotrygon marinae, P. schroederi, P.
Devya Hemraj-Naraine +5 more
doaj +1 more source
Neotropical IchthyologyThis comparative study of gill morphometrics in near-term embryos of freshwater stingray potamotrygonids examines gill dimensions in relation to neonatal lifestyle and habitat.
Wallice Paxiúba Duncan +2 more
doaj +1 more source
Heterogeneidade de hemoglobina nos peixes da Amazonia [PDF]
Acta Amazonica, 1978 Resumo Os padrões eletroforáticos de hemoglobinas de peixes da Amazônia foram descritos. Os peixes incluíram a pirambóia sul-americana, Lepidosiren paradoxa, quatro espécies de raias de água doce do género Potamotrygon e teleósteos sctinopterígeos de 77 ...
Unni E. H. Fyhn +5 more
doaj +1 more source
Potamotrygon motoro (Müller & Henle 1841) Distribution tropical S. A., east of Andes. Notes Barriga (1994), Galacatos et al. (2004), Valdiviezo-Rivera et al. (2018), Jácome-Negrete et al. (2018).
Escobar-Camacho, Daniel +4 more
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Potamotrygon falkneri Castex, Maciel 1963
, 2018 Published as part of Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, pp. 1-111 in Neotropical Ichthyology 16 (2) on page 16, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record ...
Ota, Renata Rúbia +3 more
openaire +2 more sources
Potamotrygon wallacei Carvalho, Rosa & Araujo 2016
, 2023 Potamotrygon wallacei Carvalho, Rosa & Araújo, 2016 Holotype: MZUSP 117809; adult female, 253 mm DW (cited as 264 mm DW in Carvalho et al., 2016), (Fig. 18); Rio Negro, municipality of Barcelos, Amazonas, Brazil, 0°57' 30.24"S, 62°56'14.697"W; depth: not listed; F. Marques et al.; 09 Jan 2011.
Lima, Arthur De +4 more
openaire +2 more sources