Gastrotheca williamsoni Gaige, 1922

Class: Amphibia > Order: Anura > Family: Hemiphractidae > Genus: Gastrotheca > Species: Gastrotheca williamsoni

Gastrotheca williamsoni Gaige, 1922, Occas. Pap. Mus. Zool. Univ. Michigan, 107: 1. Holotype: UMMZ 55559, by original designation. Type locality: "San Esteban, [Carabobo,] Venezuela".

Gastrotheca (Opisthodelphys) williamsoniDubois, 1987 "1986", Alytes, 5: 31.

Gastrotheca (Cryptotheca) williamsoni — Duellman, 2015, Marsupial Frogs: 145. 

Cryptotheca williamsoni — Dubois, Ohler, and Pyron, 2021, Megataxa, 5: 151, by implication.

English Names

Williamson's Marsupial Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 53).


Known only from the type locality on the north-central coastal lowlands of Carobobo, Venezuela.

Geographic Occurrence

Natural Resident: Venezuela

Endemic: Venezuela


Superficially similar to Gastrotheca longipes but of uncertain phylogenetic position, according to Duellman, Maxson, and Jesiolowski, 1988, Copeia, 1988: 527-543. See account by Rivero, 1961, Bull. Mus. Comp. Zool., 126: 144. Provisionally assigned to the Gastrotheca longipes group by Castroviejo-Fisher, Padial, De la Riva, Pombal, Silva, Rojas-Runjaic, Medina-Méndez, and Frost, 2015, Zootaxa, 4004: 1–72. See account by Duellman, 2015, Marsupial Frogs: 145–146. See Barrio-Amorós, Rojas-Runjaic, and Señaris, 2019, Amph. Rept. Conserv., 13 (1: e180): 55–57, for comments on range and literature.

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