Results 71 to 80 of about 432 (158)

An unusual, dwarf new species of Neotropical freshwater stingray, Plesiotrygon nana sp. nov., from the upper and mid Amazon basin: the second species of Plesiotrygon (Chondrichthyes: Potamotrygonidae)

Papéis Avulsos de Zoologia, 2011
A new species of the relatively poorly known Neotropical freshwater stingray genus Plesiotrygon Rosa, Castello & Thorson, 1987 is described from the main channel and smaller tributaries (Ríos Itaya and Pachitea) of the upper Amazon basin in Peru.
Marcelo R. de Carvalho, Maíra P. Ragno
doaj   +1 more source

Allometric patterns in Potamotrygon motoro (Myliobatiformes: Potamotrygonidae): insights into sexual and ontogenetic variation

Neotropical Ichthyology
Potamotrygon is the most species-rich genus of Neotropical freshwater stingrays in the Potamotrygoninae, currently comprising 31 species primarily diagnosed by coloration patterns, dermal denticles, and body measurements. Although morphometric characters
Júlia Papalardo Azevedo, Thiago Silva Loboda, Veronica Slobodian   +2 more
doaj   +1 more source

A taxonomic and morphological redescription of Potamotrygon falkneri Castex & Maciel, 1963 (Chondrichthyes: Myliobatiformes: Potamotrygonidae)

Neotropical Ichthyology
A taxonomic revision of two nominal species of freshwater stingrays of the genus Potamotrygon previously considered valid, Potamotrygon falkneri Castex & Maciel, 1963 and Potamotrygon castexi Castello & Yagolkowski, 1969, was conducted based on a ...
João Paulo C. B. da Silva, Marcelo R. de Carvalho   +1 more
doaj   +1 more source

Potamotrygon boesemani (Chondrichthyes: Myliobatiformes: Potamotrygonidae), a new species of Neotropical freshwater stingray from Surinam

Neotropical Ichthyology
Potamotrygon boesemani, new species, is described from the Corantijn river drainage in Surinam. The species has a diagnostic dorsal color pattern formed by deep orange to red ocellated spots of irregular form, encircled by relatively broad black rings ...
Ricardo S. Rosa, Marcelo R. de Carvalho, Cristiane de Almeida Wanderley   +2 more
doaj   +1 more source

Karyotypes of three rays in the order myliobatiformes

Japanese Journal of Ichthyology, 1987
Asahida, Takashi, Ida, Hitoshi, Inoue, Shu   +2 more
openaire   +1 more source

Tapeworms (Platyhelminthes, Cestoda) from marine chondrichthyans of the Southwestern Atlantic Ocean, and the sub-Antarctic and Antarctic islands: a checklist. [PDF]

Zookeys, 2023
Franzese S, Facal GG, Menoret A.
europepmc   +1 more source

Sniffing out Stingray Noses: The Functional Morphology of Batoid Olfaction. [PDF]

Integr Org Biol, 2022
Rutledge KM.
europepmc   +1 more source

Echinocephalus caniculus n. sp. (Nematoda: Gnathostomatidae Railliet, 1895) from the lesser spotted dogfish Scyliorhinus canicula (L.) (Elasmobranchii: Scyliorhinidae Gill, 1862) off Tunisia, with a key to species of the genus Echinocephalus. [PDF]

Syst Parasitol, 2022
Saad CB, Suthar J, Theisen S, Palm HW, Gargouri L.   +4 more
europepmc   +1 more source

The Phylogeny of Rays and Skates (Chondrichthyes: Elasmobranchii) Based on Morphological Characters Revisited. [PDF]

Diversity (Basel), 2022
Villalobos-Segura E, Marramà G, Carnevale G, Claeson KM, Underwood CJ, Naylor GJP, Kriwet J.   +6 more
europepmc   +1 more source

<i>Collicocephalus saminae</i> n. sp. (Cestoda: Lecanicephalidea), a new tapeworm from <i>Aetomylaeus wafickii</i> (Myliobatiformes: Myliobatidae) in the Persian Gulf, Iran. [PDF]

Int J Parasitol Parasites Wildl
Sadeghi S, Haseli M.
europepmc   +1 more source