 | Contributions to the ophiology of Lower California, Mexico and Central America
E D Cope (1861) Proc. Acad. Nat. Sci. Philadelphia 13: 292-306 |
 | On new species of snakes in the collection of the British Museum
A L B E R T Günther (1862) Ann. Mag. Nat. Hist. 9: 52-67 |
 | Notes upon some reptiles of the Old World
E D Cope (1862) Proc. Acad. Nat. Sci. Philadelphia 14: 337-344 |
 | Catalogues of the reptiles obtained during the Explorations of the Parana, Paraguay, Vermejo and Uruguay 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
E D Cope (1862) Proceedings of the Academy Natural Sciences of Philadelphia 14: 346-359 |
 | Description of Seven New Species of American Birds from Various Localities, with a Note on Zonotrichia melanotis
(1868) Proceedings of The Academy of Natural Sciences of Philadelphia 20: 359-430 |
 | An examination of the Reptilia and Batrachia obtained by the Orton Expedition to Equador and the Upper Amazon, with notes on other species
E D Cope (1868) Proc. Acad. Nat. Sci. Philadelphia 20: 96-140 |
 | Seventh account of new species of snakes in the collection of the British Museum
Albert Günther (1872) Ann. Mag. Nat. Hist. 9: 13-37 |
 | Twelfth contribution to the herpetology of tropical America
(1884) Proc. Amer. Philos. Soc. 22: 167-194 |
 | The freshwater fishes of South Africa
J D F Gilchrist and W W Thompson (1913) Annals of the South African Museum 11: 321-463 |
 | Contributions to the biology of the Philippine archipelago and adjacent regions. The fishes of the groups Elasmobranchii, Holocephali, Isospondyli, and Ostarophysi obtained by the United States Bureau of Fisheries steamer "Albatross" in 1907 to 1910, chiefly in the Philippine islands and adjacent seas
Henry W Fowler (1941) Bulletin United States National Museum 100(13): 2-879 |
 | A brief review of the snakes of Costa Rica
E H Taylor (1951) University of Kansas Science Bulletin 34: 3-188 |
 | Type specimens of reptiles and amphibians in the United States National Museum
(1961) Bulletin of the United States National Museum 220: 1-291 |
 | Catalogue of the Neotropical Squamata. Part I. Snakes
James A Peters and Braulio Orejas-Miranda (1970) Bulletin United States National Museum 297: 1-347 |
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