Potamotrygon Humerosa - "Mosaic"
Common Names: Mosaic River Stingray, Mosaic Ray.
Distribution: Argentina, Venezuela, Brazil, Bolivia, Colombia, French
Guyana, Guyana, Peru, Surinam, Paraná-Paraguay, Orinoco, and Amazon River basins.
Maximum Size (Disc Width): appx. 18"+
Juvenile Tank Footprint: 60"x18"
Adult Tank Footprint: 96"x36"
Feeding Habits: P. Humerosa tend to have good feeding habits. This ray is often neglected upon shipment, and can have a hard time being acclimated to foods. Start with live black worms. After parasite treatments are complete, try mixing prepared foods with black worms.
Info: Potamotrygon Humerosa is one of the small river stingrays. Once acclimated, it can be a hardy and delightful ray for a community setting in an aquarium of around 300-400 gallons.
Confusion: Taxonomic work on the family is constrained by the fact that many species of Potamotrygon are poorly described, lack adequate material, or present much intraspecific variation in coloration. This is compounded by generally overlapping meristic and morphometric features among species of Potamotrygon (both other genera are monotypic). Therefore, the approach adopted here has been to not recognize certain species that are inadequately defined at present, or that lack adequate material for proper characterization (e.g. Potamotrygon dumerilii,Potamotrygon humerosa)
Variants: P. Humerosa has a number of different variants, many of which are very hard to distinguish.
Synonyms: P. Dumerilli, P. Humerosa, P. Orbignyi, P. cf. Histrix