Phrynonax is a genus of snakes in the family Colubridae. The genus is endemic to the New World
Geographic range Species in the genus Phrynonax are found in South America, Central America, and Mexico..
Species Three species are recognized as being valid.
Phrynonax poecilonotus - puffing snake Phrynonax sexcarinatus (Wagler, 1824) - northeastern puffing snake Phrynonax shropshirei Barbour & Amaral, 1924 - Shropshire's puffing snake
Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Phrynonax.
Etymology The specific name, shropshirei, is in honor of James B. Shropshire, "Chief Sanitary Inspector, U.S. Army, Canal Zone", who collected the paratype.Barbour T, Amaral A (1924). "Notes on some Central American snakes". Occ. Pap. Boston Soc. Nat. Hist. 5: 129-132. (Phrynonax shropshirei, new species, p. 131).Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (Pseustes shropshirei, p. 243).
References
Further reading Cope ED (1862). "Catalogues of the REPTILES obtained during the Exploration of the Parana, Paraquay, Vermejo and Uruguay [sic] 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 ". Proc. Acad. Nat. Sci. Philadelphia 14: 346-359 + errata and addenda on p. 594. (Phrynonax, new genus, p. 348).