Pristimantis rosadoi

Pristimantis rosadoi is a species of frog in the family Craugastoridae. It is found in northwestern Ecuador in Carchi, Esmeraldas, and Pichincha provinces, and in the adjacent Colombia in the Nariño Department as well as on the Gorgona Island;[1][2][4] there is some doubt about the identity of the Gorgona Island specimens,[1] while the checklist of Colombian amphibians only mentions the Gorgona record.[5] The specific name rosadoi honors José P. O. Rosado,[3] herpetologist at the Museum of Comparative Zoology,[6] and also alludes to similarity of this species to Pristimantis roseus.[3] Common name Rosado's robber frog has been proposed for it.[1][2][4][6]

Pristimantis rosadoi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Craugastoridae
Genus: Pristimantis
Subgenus: Hypodictyon
Species:
P. rosadoi
Binomial name
Pristimantis rosadoi
(Flores, 1988)
Synonyms[2]

Eleutherodactylus rosadoi Flores, 1988[3]

Description

Adult males measure 17–19 mm (0.7–0.7 in) and adult females 22–27 mm (0.9–1.1 in) in snout–vent length (SVL).[4][7][8] The upper eyelid bears 1–2 conical tubercles, but these may not be obvious in some individuals. The tympanum is prominent. The snout is subacuminate in dorsal view and rounded in profile; there is a small papilla at its tip. The fingers bear broad discs and weakly crenulated lateral fringes. The toes bear narrow lateral fringes. Dorsal skin bears many small tubercles.[4][7] Dorsal coloration is tan to reddish tan with dark brown markings.[7]

Reproduction

A 24-mm SVL female, amplexed with a 17-mm male, had 52 mature eggs in her oviduct.[8] Development is presumed to be direct[1] (i.e, there is no free-living larval stage[9]).

Habitat and conservation

Pristimantis rosadoi occurs in primary and secondary lowland forest at elevations up to 800 m (2,600 ft) above sea level. It is often found near streams. It is nocturnal, and specimens have been found at night on low vegetation. It does not occur in open areas. It is not known where the eggs are deposited.[1][4]

Pristimantis rosadoi is an uncommon species. Threats to it likely include agricultural development, logging, human settlement, and pollution resulting from the spraying of illegal crops. It is found in the Cotacachi Cayapas Ecological Reserve (Ecuador) and Gorgona National Natural Park (Colombia).[1]

References
  1. IUCN SSC Amphibian Specialist Group (2018). "Pristimantis rosadoi". IUCN Red List of Threatened Species. 2018: e.T56923A85874865. Retrieved 19 May 2020.
  2. Frost, Darrel R. (2020). "Pristimantis rosadoi (Flores, 1988)". Amphibian Species of the World: An Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 19 May 2020.
  3. Flores, Glenn (1988). "Two new species of Ecuadorian Eleutherodactylus (Leptodactylidae) of the E. crucifer assembly". Journal of Herpetology. 22 (1): 34–41. doi:10.2307/1564354. JSTOR 1564354.
  4. Yánez-Muñoz, M. H.; et al. (2019). Ron, S. R.; Merino-Viteri, A. & Ortiz, D. A. (eds.). "Pristimantis rosadoi". Anfibios del Ecuador. Version 2019.0. Museo de Zoología, Pontificia Universidad Católica del Ecuador (QCAZ). Retrieved 19 May 2020.
  5. Acosta Galvis, A. R. (2020). "Pristimantis rosadoi (Flores, 1988)". Lista de los Anfibios de Colombia: Referencia en linea V.10.2020. Retrieved 19 May 2020.
  6. Beolens, Bo; Watkins, Michael & Grayson, Michael (2013). The Eponym Dictionary of Amphibians. Pelagic Publishing. p. 183. ISBN 978-1-907807-42-8.
  7. Lynch, J. D. & Duellman, W. E. (1997). "Frogs of the genus Eleutherodactylus in western Ecuador. Systematics, ecology, and biogeography". Special Publication, Natural History Museum, University of Kansas. 23: 1–236. (Eleutherodactylus rosadoi: pp. 129–130)
  8. Ortega-Andrade, H. Mauricio; Bermingham, Juliet; Aulestia, Carlos; Paucar, Christian; et al. (2010). "Herpetofauna of the Bilsa Biological Station, province of Esmeraldas, Ecuador". Check List. 6 (1): 119–154. doi:10.15560/6.1.119.
  9. Vitt, Laurie J. & Caldwell, Janalee P. (2014). Herpetology: An Introductory Biology of Amphibians and Reptiles (4th ed.). Academic Press. p. 166.
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