Espesye sa bao ang Phrynops geoffroanus[8]. Una ning gihulagway ni August Friedrich Schweigger ni adtong 1812. Ang Phrynops geoffroanus sakop sa kahenera nga Phrynops sa kabanay nga Chelidae.[9][10] Pagka karon wala pay siak nga nalista ubos niini niya.[9]
- ↑ Luederwaldt, H. (1926) Os chelonios brasilieros com a lista das espécies do Museu Paulista., Rev. Mus. Paulista, Sao Paulo 14:408-468
- ↑ Bohls, J. (1895) Bermerkung zur Eintheilung der Chelydidae., Zool. Anz. 18: 51-53
- ↑ 3.0 3.1 Boulenger, G.A. (1889) Catalogue of the Chelonians, Rhynchocephalians, and Crocodiles in the British Museum (Natural History)., British Museum, London, 311 pp.
- ↑ Boulenger, G.A. (1886) A synopsis of the reptiles and batrachians of the province Rio Grande do Sul, Brazil., Ann. Mag. nat. Hist. (5) 18: 423-445
- ↑ 5.0 5.1 5.2 Duméril, A.M.C., and G. Bibron. (1835) Erpétologie Générale ou Histoire Naturelle Complète des Reptiles, Vol. 2., Librairie Encyclopédique de Roret, Paris, 680 p.
- ↑ Spix, J.B. and J.G. Wagler (1824) Herpetology of Brazil., Facsimile Reprints in Herpetology, Society for the Study of Amphibians and Reptiles. 400 pp.
- ↑ Merrem, B. (1820) Versuch eines Systems der Amphibien I (Tentamen Systematis Amphibiorum)., J. C. Kriegeri, Marburg, 191 pp.
- ↑ 8.0 8.1 8.2 Schweigger, A.F. (1812) Prodromus Monographia Cheloniorum auctore Schweigger., Königsberg. Arch. Naturwiss. Mathem., 1: 271-368, 406-458.
- ↑ 9.0 9.1 Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Retrieved 24 september 2012. CS1 maint: multiple names: authors list (link)
- ↑ TIGR Reptile Database . Uetz P. , 2007-10-02