Though species of Polychrus have an almost exclusively South American distribution today, a stem representative, Sauropithecoides charisticus, was reported from the late Eocene of North Dakota, USA.[5][6]
^Smith, K.T. (2011) The evolution of mid-latitude faunas during the Eocene: Late Eocene lizards of the Medicine Pole Hills reconsidered. Bulletin of the Peabody Museum of Natural History 52: 3-105. https://doi.org/10.3374/014.052.0101
^Smith, K.T. (2006) A diverse new assemblage of late Eocene squamates (Reptilia) from the Chadron Formation, North Dakota, U.S.A. Palaeontologia Electronica 9.2.5A.
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Boulenger, G. A. 1908. "Descriptions of new South American reptiles". Ann. Mag. Nat. Hist., Ser. 8, 1 (1): 111−115.
Koch, C., Venegas, P.J., Garcia-Bravo, A. & Böhme, W. 2011. "A new bush anole (Iguanidae: Polychrotinae: Polychrus) from the upper Marañon basin, Peru, with a redescription of Polychrus peruvianus (Noble, 1924) and additional information on P. gutturosus Berthold, 1845". ZooKeys141: 79−107.
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Schlüter, U. 2013. "Buntleguane - Lebensweise, Pflege, Fortpflanzung". KUS-Verlag, Rheinstetten, 78 pp. (A Monograph on Polychrus)
Spix, J. B. von 1825. "Animalia nova sive species novae lacertarum,quas in itinere per Brasiliam annis MDCCCXVII-MDCCCXX jussu et auspiciis Maximiliani Josephi I. Bavariae regis". F. S. Hübschmann, München, pp. 1−26.
Werner, F. 1910. "Über neue oder seltene Reptilien des Naturhistorischen Museums in Hamburg. II. Eidechsen". Mitt. Naturhist. Mus. Hamburg27 (2): 1−46.