Craugastor pygmaeus (Taylor, 1937)

Class: Amphibia > Order: Anura > Superfamily: Brachycephaloidea > Family: Craugastoridae > Genus: Craugastor > Species: Craugastor pygmaeus

Eleutherodactylus pygmaeus Taylor, 1937 "1936", Trans. Kansas Acad. Sci., 39: 352. Holotype: EHT-HMS 3691, by original designation; now UIMNH 16125, according to J.D. Lynch IN Frost, 1985, Amph. Species World: 315. Type locality: "1 mile north of Rodriguez Clara, Vera Cruz", Mexico.

Microbatrachylus albolabris Taylor, 1940 "1939", Univ. Kansas Sci. Bull., 26: 502. Holotype: EHT-HMS 6407, by original designation; now FMNH 100071 according to Marx, 1976, Fieldiana, Zool., 69: 58. Type locality: "two miles west of Córdoba, Veracruz", Mexico. Synonymy by Duellman, 1961, Univ. Kansas Publ. Mus. Nat. Hist., 15: 34.

Microbatrachylus pygmaeusTaylor, 1940 "1939", Univ. Kansas Sci. Bull., 26: 500.

Microbatrachylus minimus Taylor, 1940 "1939", Univ. Kansas Sci. Bull., 26: 507. Holotype: EHT-HMS 6416, by original designation; now FMNH 100323 according to Marx, 1976, Fieldiana, Zool., 69: 58. Type locality: "Agua del Obispo, Guerrero (km. 350) in pine forest", Mexico. Synonymy by Duellman, 1961, Univ. Kansas Publ. Mus. Nat. Hist., 15: 34.

Microbatrachylus imitator Taylor, 1942, Univ. Kansas Sci. Bull., 28: 70. Holotype: USNM 115508, by original designation. Type locality: "La Esperanza, near Escuintla, Chiapas", Mexico. Synonymy by Duellman, 1961, Univ. Kansas Publ. Mus. Nat. Hist., 15: 34.

Eleutherodactylus pygmaeusLynch, 1965, Nat. Hist. Misc., 182: 9.

Eleutherodactylus (Craugastor) pygmaeusHedges, 1989, in Woods (ed.), Biogeograph. W. Indies: 317, by implication; Lynch, 1996, in Powell and Henderson (eds.), Contr. W. Indian Herpetol.: 154; Heinicke, Duellman, and Hedges, 2007, Proc. Natl. Acad. Sci. USA, 104: 10094.

Craugastor pygmaeusCrawford and Smith, 2005, Mol. Phylogenet. Evol., 35: 551, by implication; Frost, Grant, Faivovich, Bain, Haas, Haddad, de Sá, Channing, Wilkinson, Donnellan, Raxworthy, Campbell, Blotto, Moler, Drewes, Nussbaum, Lynch, Green, and Wheeler, 2006, Bull. Am. Mus. Nat. Hist., 297: 360.

Craugastor (Craugastor) pygmaeusHedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 39.

English Names

Pigmy Free-fingered Frog (Liner, 1994, Herpetol. Circ., 23: 20).

Pigmy Robber Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 78; Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 11).


Widely distributed throughout lowland to intermediate localities in the states of Chiapas, Puebla, Oaxaca, and Veracruz (also possibly Tabasco, Mexico, and western Guatemala) from near sea level to 2000 m. See comment. 


See discussion by Lynch, 1965, Nat. Hist. Misc., 182: 1–12. In the Eleutherodactylus (Craugastor) rhodopis group according to Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 231. See photograph, map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 309. Köhler, 2011, Amph. Cent. Am.: 140–191, provided a key to the genera and species of Brachycephaloidea (= Craugastoridae, Eleutherodactylidae) in Central America and provided maps and photographs of the species, including this one. In the Craugastor (Craugastor) mexicanus species series of Padial, Grant, and Frost, 2014, Zootaxa, 3825: 123. García-Padilla and Mata-Silva, 2014, Herpetol. Rev., 45: 468, provided a record for the Municipality of Santa Catarina Juquila, Oaxaca, Mexico, and briefly discussed the documented range in that state.  The records by Ahumada-Carrillo, Arenas-Monroy, Fernández-Nava, and Vázquez-Huizar, 2013, Rev. Mexicana Biodiversidad, 84: 1338–1342, reported the species for Sinaloa, Nayarit, and Jalisco, Mexico, were subsequently reassigned to Craugastor pygmaeus by Jameson, Streicher, Manuelli, Head, and Smith, 2022, Herpetol. Monogr., 36: 34–35, who addressed morphometrics, molecular phylogenetics, morphology, and placed this species in their Craugastor mexicanus series. 

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