Species description based on Savage (1968). A small frog. Males and females are similarly sized (to about 24 mm), but can be distinguished because males have mottling on the throat whereas females throats are white. The third finger of adult males is swollen.
The dorsal surface is dark brown, bordered on either side by a lighter dorsolateral stripe.
Lateral surface dark except for a light stripe (sometimes fragmented) extending from the groin to halfway to the eye. Rear surface of thighs have two dark marks above and below a central light line.
Feet have no webbing between the toes.
Habitat and Ecology
Lowland forest to 1600 m.
Colostethus pratti populations are likely beginning to decline east of the Panama Canal due to the spread of chytrid fungus to that region (Woodhams et al 2008).
Life History and Behavior
Tadpoles are pale in color (Savage 1968). Some brown flecks may be present on the dorsal surface (Savage 1968). Mouthparts consist of two upper (one continuous and one partial) and three lower teethrows (Savage 1968).
Molecular Biology and Genetics
Barcode data: Colostethus pratti
Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.
See the BOLD taxonomy browser for more complete information about this specimen and other sequences.
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Download FASTA File
Statistics of barcoding coverage: Colostethus pratti
Public Records: 8
Specimens with Barcodes: 67
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
Colostethus pratti is a species of frog in the Dendrobatidae family. It is found in the northwestern Colombia (Antioquia, Chocó, Córdoba, and Risaralda Departments) and Panama, possibly also in southeastern Costa Rica. It is sometimes known as the Pratt's rocket frog. Colostethus pratti is named after Antwerp Edgar Pratt, an explorer who collected the type series.
Colostethus pratti is a small member of its genus; both males and females grow to about 24 mm (0.94 in) snout–vent length. It is brown above with characteristic dull paired dorsolateral stripes.
Reproduction of Colostethus pratti has been observed in captivity. Males have a loud, peeping advertisement call. They appear to establish small territories and can be aggressive against each other, engaging in "wrestling" bouts. Amplexus has not been observed but is presumably cephalic as in related species. Egg clusters contain 8-20 eggs. They are deposited on top of leaves or within plastic hiding places, primarily during a simulated wet season. Eggs hatch in 1-2 weeks. After hatching, the female transports the tadpoles to a body of water, carrying them on her back, sometimes for several days. No further parental care is provided. Tadpoles metamorphose 8–13 weeks after hatching. Newly-metamorphosed froglets are 6–8 mm (0.24–0.31 in) in length. Some males start calling as soon as six months post-metamorphosis.
Habitat and conservation
Colostethus pratti is a common frog. Its natural habitats are humid lowland and montane forests where it occurs on the forest floor and along rocky sections of forest streams. Agriculture, logging and pollution are threats to this species, although it is not considered threatened as a species due to its wide distribution and presumably large total population.
|Wikimedia Commons has media related to Colostethus pratti.|
- Frank Solís, Roberto Ibáñez, César Jaramillo, Querube Fuenmayor, Martha Patricia Ramírez Pinilla, Mariela Osorno-Muñoz, Jose Vicente Rueda, Adolfo Amézquita, María Cristina Ardila-Robayo (2004). "Colostethus pratti". IUCN Red List of Threatened Species. Version 2014.3. International Union for Conservation of Nature. Retrieved 3 December 2014.
- Boulenger, G. A. (1899). "Descriptions of new batrachians in the collection of the British Museum (Natural History)". Annals and Magazine of Natural History, Series 7 3: 273–277.
- Frost, Darrel R. (2014). "Colostethus pratti (Boulenger, 1899)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 3 December 2014.
- Acosta-Galvis, A.R. (2014). "Colostethus pratti (Boulenger, 1899)". Lista de los Anfibios de Colombia V.04.2014. www.batrachia.com. Retrieved 3 December 2014.
- Beolens, Bo; Watkins, Michael; Grayson, Michael (2013). The Eponym Dictionary of Amphibians. Exeter, England: Pelagic Publishing Ltd. ISBN 978-1-907807-44-2.
- Savage, Jay M. (1968). "The dendrobatid frogs of Central America". Copeia 1968: 745–776. JSTOR 1441845.
- Hill, R. L., J. B. Kaylock, R. W. Gagliardo, E. K. Timpe, E. Griffith, and H. Ross (2011). "Observations on the captive reproduction of Colostethus pratti". Herpetological Review 42 (3): 365–367.