Engystomops coloradorum

Engystomops coloradorum, also known as Colorado dwarf frog, is a species of frogs in the family Leptodactylidae. It is endemic to the Pacific lowlands and foothills of the Andes in the Pichincha and Santo Domingo de los Tsáchilas Provinces, Ecuador.[1][3][4]

Engystomops coloradorum
Engystomops coloradorum.jpg
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Leptodactylidae
Genus: Engystomops
E. coloradorum
Binomial name
Engystomops coloradorum
(Cannatella [fr] and Duellman [fr], 1984)

Physalaemus coloradorum Cannatella and Duellman, 1984[2]


Adult males measure 18–24 mm (0.71–0.94 in) and adult females 22–26 mm (0.87–1.02 in) in snout–vent length.[2][4] The snout is subacuminate. The tympanum is small, recessed, and smooth, whereas the tympanic annulus is granular. The forelimbs are slender; fingers are without webbing. The hind limbs are short and the toes have basal webbing. All dorsal surfaces have small tubercles, and there are large tubercles on head and body. The dorsum is brown and may have an orange-brown middorsal stripe posteriorly. The limbs are orange-brown; forelimbs have dark brown markings and hind limbs have dark brown to black bars. The venter is black and heavily mottled with white or bluish white, which becomes dark brown on flanks and hind limbs. The iris is pale grayish brown or dull bronze and has fine black reticulations.[2][4]

Habitat and conservationEdit

Its natural habitats are tropical moist forests and more open, altered habitats at elevations of 100–1,100 m (330–3,610 ft) above sea level (AmphibiaWebEcuador puts the lower limit to 400 m[4]). It breeds in small, still waterbodies where it makes foam nests.[1][4] It can be locally abundant but its range is small.[4] Though adaptable, it is probably threatened by habitat loss.[1]


  1. ^ a b c d Coloma, L.A.; Ron, S.; Cisneros-Heredia, D. & Almandáriz, A. (2010). "Engystomops coloradorum". IUCN Red List of Threatened Species. 2010: e.T57247A11608582. doi:10.2305/IUCN.UK.2010-2.RLTS.T57247A11608582.en. Retrieved 11 January 2018.
  2. ^ a b c Cannatella, David C.; Duellman, William E. (1984). "Leptodactylid frogs of the Physalaemus pustulosus group". Copeia. 1984 (4): 902–921. doi:10.2307/1445335. JSTOR 1445335.
  3. ^ a b Frost, Darrel R. (2020). "Engystomops coloradorum (Cannatella and Duellman, 1984)". Amphibian Species of the World: an Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 29 May 2020.
  4. ^ a b c d e f Read, M. & Ron, S. R. (2019). Ron, S. R.; Merino-Viteri, A. & Ortiz, D. A. (eds.). "Engystomops coloradorum". Anfibios del Ecuador. Version 2019.0. Museo de Zoología, Pontificia Universidad Católica del Ecuador (QCAZ). Retrieved 29 May 2020.