IUCN threat status:

Data Deficient (DD)

Comprehensive Description

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Description

  Common names: roundray (English), raya-redonda (Espanol)
 
Urotrygon nana Miyake & McEachran, 1988

Dwarf roundray,     Pygmy roundray

Disc oval, relatively wide - ~ 61% of TL; eyes very small (< length of spiracle); pectorals continuous around head; tail slender; 1 large venomous spine on tail; no dorsal fins; tail length greater than disc length; tail fin elongate oval, upper and lower lobes not confluent, fin slender but not tapered, length of dorsal lobe of fin ~ 17% of SL; small curved denticles either uniformly cover entire disc, or densely cover edges of disc and snout, and sparsely cover mid-disc, denticles on top and sides of tail and on upper lobe of tail fin; no thorns on midline.

Upper surface pale tan with indistinct fine meshwork of darker lines, particularly in center of disc and tail base; lower surface white, with broad dark (grey-brown fading to tan at inner side) edging to disc.

Size: 26 cm (15 cm wide).

Habitat: benthic on soft bottoms.

Depth: 2-15 m.

Eastern Gulf of California to Panama.   

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© Shorefishes of the tropical eastern Pacific online information system. www.stri.org/sftep

Source: Shorefishes of the Tropical Eastern Pacific Online Information System

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