Isthmohyla picadoi Dunn 1933
Volcan Barba Treefrog
Isthmohyla picadoi is interesting because populations of these frogs continue to persist in areas where other amphibian populations have declined due to chytrid fungus.
Species description based on Duellman (2001) and Savage (2002).
A small, rather squat treefrog: males to 32 mm, females to 35 mm.
Dorsal coloration ranges from yellow to orange to olive brown. Some darker markings may be present, including an indistinct brown line that runs from behind the eye along the side of the body towards the groin, a dark spot on the top of the head, and a dark bracelet at the wrist. The skin of the dorsum is covered in very small bumps.
The venter is white and slightly bumpy in appearance.
The iris is coppery red.
The fingers and toes are relatively short and thick, and end in large terminal discs.
Males call throughout the rainy season (Savage 2002). These frogs breed in bromeliads (Savage 2002).
The tadpole body is flattened, with a long, thin tail with low tail fins. Tadpoles are grey, with a lighter ventral surface and tail fins.
Ecology behavior and evolution
These frogs are commonly found in bromeliads (Stuckert et al. 2009).
The call has been described by Lindquist and Cossel (2007).
Behavior and communication
Although this behavior has not been directly observed, females probably feed tadpoles unfertilized eggs (Savage 2002).
Taxonomy and systematics
Volcan Barba, [southwestern slope, Cantón de Santa Barbara, Provincia de Heredia,] Costa Rica, a little above the farm of Manuel Acosta, 2140 m
Habitat and distribution
HabitatMontane forest to 2650 m.
Costa Rica, Panama
Duellman, WE. 1970. The Hylid frogs of Middle America. 2 volumes. Monograph. Museum of Natural History, University of Kansas: 1-753.
Duellman, WE. 2001. Hylid Frogs of Middle America. Second Edition. Society for the Study of Amphibians and Reptiles, Contributions to Herpetology, No. 18.
Dunn, ER. 1937. The amphibian and reptilian fauna of bromeliads in Costa Rica and Panama. Copeia 1937: 163-167.
Faivovich, J, CFB Haddad, P Garcia, DR Frost, JA Campbell, and WC Wheeler. 2005. Systematic review of the frog family Hylidae, with special reference to Hylinae: a phylogenetic analysis and taxonomic revision. Bulletin of the American Museum of Natural History 294: 1-240.
Lindquist, ED and JO Cossel. 2007. Hyla picadoi (NCN). Vocalizations. Herpetological Review 38: 438– 440.
Savage, JM. 2002. The Amphibians and Reptiles of Costa Rica. Chicago: University of Chicago Press.
Savage, JM. 1974. Type locality for species of amphibians and reptiles described from Costa Rica. Revista de Biología Tropical. San José 22: 71-122.
Stuckert, AMM, JP Stone, JR Asper, MG Rinker, CL Rutt, NC Trimmer, and ED Lindquist. 2009. Microhabitat use and spatial distribution in Picado’s Bromeliad Treefrog, Isthmohyla picadoi (Anura, Hylidae). Phyllomedusa 8(2):125-134.