Antenna rays (Plesiotrygon)

General data

Main name: Antenna rays

Classification

Family: Potamotrygonidae - Southamerican freshwater stingrays
Order: Myliobatiformes - Stingrays
Class: Elasmobranchii - Sharks and Rays
Superclass: Chondrichthyes - Cartilaginous fishes

Description

Plesiotrygon, the antenna rays, is a small genus of freshwater stingrays in the family Potamotrygonidae endemic to the Amazon basin in South America. They are found in large rivers and the lower part of their tributaries. The maximum disc width is up to 58 cm (23 in), but both species are very long-tailed (tail length typically at least twice the disc width). Plesiotrygon are occasionally kept in aquariums and both species have been bred in captivity, but they are sensitive and the tail is easily damaged. There are two recognized species: Plesiotrygon iwamae R. de S. Rosa, Castello & Thorson, 1987 (long-tailed river stingray, antenna ray) Plesiotrygon nana M. R. de Carvalho & Ragno, 2011 (black-tailed antenna ray, dwarf antenna ray)

Species

Black-tailed antenna ray (Plesiotrygon nana)

Long-tailed river stingray (Plesiotrygon iwamae)

Taxonomy of Fishes

Osteichthyes - Bony fishes->
Chondrichthyes - Cartilaginous fishes->
- Elasmobranchii - Sharks and Rays->
  - Lamniformes - Mackerel sharks->
  - Carcharhiniformes - Ground sharks->
  - Rhinopristiformes - Shovelnose rays->
  - Torpediniformes - Electric rays->
  - Rajiformes - Skates and rays->
  - Orectolobiformes - Carpet shark->
  - Squatiniformes - Angelsharks->
  - Heterodontiformes - Bullhead and horn sharks->
  - Hexanchiformes - Six-gill sharks->
  - Myliobatiformes - Stingrays->
    
    Dasyatidae - Stingrays->
    
    Mobulidae - Manta rays->
    
    Potamotrygonidae - Southamerican freshwater stingrays->
    
    Potamotrygon - Potamotrygon->
    
    Plesiotrygon - Antenna rays->
    
    Heliotrygon - Heliotrygon->
    
    Paratrygon - Paratrygon->
    
    Styracura - Styracura->
    
    Gymnuridae - Butterfly rays->
    
    Myliobatidae - Eagle ray->
    
    Urotrygonidae - American round stingrays->
    
    Aetobatidae - Pacific eagle rays->
    
    Hexatrygonidae - Sixgill stingrays->
    
    Plesiobatidae - Deepwater stingrays->
    
    Rhinopteridae - Cownose rays->
    
    Urolophidae - Round rays->
    
    Zanobatidae - Panrays->
  - Squaliformes - Sleeper and dogfish sharks->
  - Echinorhiniformes - Bramble sharks->
  - Pristiophoriformes - Saw sharks->
- Holocephali - Chimaeras->
Agnatha - Jawless fishes->