Třída: Chondrichthyes - paryby
Řád: Myliobatiformes -
Čeleď: Urotrygonidae -

Typový druh: Urotrygon mundus Gill, 1863

Reference: Gill T. N. 1863. Descriptive enumeration of a collection of fishes from the western coast of Central America, presented to the Smithsonian Institution by Captain John M. Dow. Proc. Acad. Nat. Sci. Phila. v. 15. 162-174.

Přehled druhů

• Urotrygon aspidura (Jordan & Gilbert, 1882)
  Tlustoocaska panamská
  Jordan, D. S. & C. H. Gilbert. 1882. Descriptions of nineteen new species of fishes from the Bay of Panama. Bull. U. S. Fish Comm. v. 1 [1881]: 306-335.
• Urotrygon caudispinosus Hildebrand, 1946
  Tlustoocaska trnoocasá
  Hildebrand, S. F. 1946. A descriptive catalog of the shore fishes of Peru. Bull. U. S. Natl. Mus. No. 189: i-xi + 1-530.
• Urotrygon cimar López S & Bussing, 1998
  López S., M. I. & W. A. Bussing. 1998. Urotrygon cimar, a new eastern Pacific stingray (Pisces: Urolophidae). Rev. Biol. Trop. No. 46 (Suppl. 6): 271-277.
• Urotrygon chilensis (Günther, 1872)
  Tlustoocaska chilská
  Günther, A. 1872. Report on several collections of fishes recently obtained for the British Museum. Proc. Zool. Soc. Lond. 1871 (pt 3): 652-675, Pls. 53-70.
• Urotrygon microphthalmum Delsman, 1941
  Tlustoocaska drobnooká
  Delsman, N. C. 1941. Résultats scientifiques des croisières du Navire-école Belge "Mercator", vol. III, No. 3. Pisces. Mém. Mus. R. Hist. Nat. Belg. (Ser. 2) No. 21: 47-82.
• Urotrygon munda (Gill, 1863)
  Tlustoocaska středoamerická
  Gill, T. N. 1863. Descriptive enumeration of a collection of fishes from the western coast of Central America, presented to the Smithsonian Institution by Captain John M. Dow. Proc. Acad. Nat. Sci. Phila. v. 15: 162-174.
• Urotrygon nana Miyake & McEachran, 1988
  Tlustoocaska drobná
  Miyake, T. & J. D. McEachran. 1988. Three new species of the stingray genus Urotrygon (Myliobatiformes: Urolophidae) from the eastern Pacific. Bull. Mar. Sci. v. 42 (no. 3): 366-375.
• Urotrygon peruanus Hildebrand, 1946
  Tlustoocaska peruánská
  Hildebrand, S. F. 1946. A descriptive catalog of the shore fishes of Peru. Bull. U. S. Natl. Mus. No. 189: i-xi + 1-530.
• Urotrygon reticulata Miyake & McEachran, 1988
  Tlustoocaska síťkovaná
  Miyake, T. & J. D. McEachran. 1988. Three new species of the stingray genus Urotrygon (Myliobatiformes: Urolophidae) from the eastern Pacific. Bull. Mar. Sci. v. 42 (no. 3): 366-375.
• Urotrygon rogersi (Jordan & Starks, 1895)
  Tlustoocaska Rogersova
  Jordan, D. S. 1895. The fishes of Sinaloa. Proc. Calif. Acad. Sci. (Ser. 2) v. 5: 377-514, Pls. 26-55.
• Urotrygon serrula Hildebrand, 1946
  Tlustoocaska zoubkovaná
  Hildebrand, S. F. 1946. A descriptive catalog of the shore fishes of Peru. Bull. U. S. Natl. Mus. No. 189: i-xi + 1-530.
• Urotrygon simulatrix Miyake & McEachran, 1988
  Tlustoocaska nenápadná
  Miyake, T. & J. D. McEachran. 1988. Three new species of the stingray genus Urotrygon (Myliobatiformes: Urolophidae) from the eastern Pacific. Bull. Mar. Sci. v. 42 (no. 3): 366-375.
• Urotrygon venezuelae Schultz, 1949
  Tlustoocaska venezuelská
  Schultz, L. P. 1949. A further contribution to the ichthyology of Venezuela. Proc. U. S. Natl. Mus. v. 99 (no. 3235): 1-211, Pls. 1-3.

Statistické údaje

Počet druhů: 13