dans le nord de l'Argentine dans le provinces de Formosa, Chaco, Corrientes, Entre Ríos et Santa Fe.
Publication originale
Cope, 1862 : Catalogues of the Reptiles Obtained during the Explorations of the Parana, Paraguay, Vermejo and Uraguay Rivers, by Capt. Thos. J. Page, U. S. N.; And of Those Procured by Lieut. N. Michler, U. S. Top. Eng., Commander of the Expedition Conducting the Survey of the Atrato River. Proceedings of the Academy of Natural Sciences of Philadelphia, vol. 14, p. 346-359+594 (texte intégral).