Pristimantis bearsei

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Pristimantis bearsei
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Craugastoridae
Genus: Pristimantis
Species: P. bearsei
Binomial name
Pristimantis bearsei
(Duellman (fr), 1992)

Eleutherodactylus bearsei Duellman, 1992[2]

Pristimantis bearsei is a species of frog in the Craugastoridae family. It is endemic to Peru and only known from the region of its type locality northeast of Tarapoto in the San Martín Region.[3] Common name Bearse's robber frog has been coined for this species.[3]


The specific name bearsei honours Robert Carleton Bearse, an American physicist. As the Associate Vice Chancellor of the University of Kansas, his administration enhanced the programs of the University of Kansas Natural History Museum.[2][4]


Pristimantis bearsei males measure 23–26 mm (0.91–1.02 in) and females about 38–39 mm (1.5–1.5 in) in snout–vent length. The dorsum is shagreen and brown with darker brown marks on back and transverse bars on limbs. The venter is brown with cream flecks. The tympanum is prominent. The toes have lateral fringes but no webbing. Males have vocal slits.[2][5]

Habitat and conservation[edit]

Pristimantis bearsei occur in lower humid montane forests at elevations of 500–730 m (1,640–2,400 ft) above sea level close to streams. Adults have been found on mossy boulders, and some juveniles also on herbaceous vegetation.[1][2] The species is threatened by habitat loss. Its range overlaps with the Cordillera Azul National Park.[1]


  1. ^ a b c Rodríguez, L.; Martinez, J.L.; Monteza, J.I.; Angulo, A. (2004). "Pristimantis bearsei". IUCN Red List of Threatened Species. IUCN. 2004: e.T56456A11481127. doi:10.2305/IUCN.UK.2004.RLTS.T56456A11481127.en. Retrieved 23 November 2016. 
  2. ^ a b c d Duellman, W. E. (1992). "Eleutherodactylus bearsei new species (Anura: Leptodactylidae) from northeastern Peru". Occasional Papers of the Museum of Natural History University of Kansas. 150: 1–7. 
  3. ^ a b c Frost, Darrel R. (2016). "Pristimantis bearsei (Duellman, 1992)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 23 November 2016. 
  4. ^ Bo Beolens; Michael Watkins; Michael Grayson (22 April 2013). The Eponym Dictionary of Amphibians. Pelagic Publishing. p. 18. ISBN 978-1-907807-42-8. 
  5. ^ Duellman, William E.; Pramuk, Jennifer B. (1999). "Frogs of the genus Eleutherodactylus (Anura: Leptodactylidae) in the Andes of northern Peru". Scientific Papers. Natural History Museum, University of Kansas. 13: 1–78.