Maracaibo Basin treefrog
Male calling
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Hylidae
Genus: Scarthyla
Species:
S. vigilans
Binomial name
Scarthyla vigilans
(Solano, 1971)
Synonyms[2]

Hyla vigilans Solano, 1971

Scarthyla vigilans (Maracaibo Basin treefrog) is a species of frog in the family Hylidae. It is found in northern Colombia (Caribbean lowlands, Magdalena Valley, and eastern llanos), northern Venezuela (Maracaibo Basin, Falcón, Coastal Range, high Llanos and Orinoco Delta), and Trinidad.[2][3][4] Although generic allocation of this species has been controversial, molecular data have now confirmed its close relationship with Scarthyla goinorum and placement in that genus.[3] Indeed, adults are very similar to Scarthyla goinorum; however, the male advertisement call and tadpoles are clearly distinct.[5]

Description

Scarthyla vigilans are small frogs, with a maximum size of 21 mm (0.8 in) in snout–vent length. The body is elongate and slender. The head is as wide as the body and longer than it is wide. The snout is long and acuminate. The eyes are moderately large and protuberant. The tympanum is distinct although partly obscured by the diffuse supratympanic fold. The fingers and toes are slender and bear small round discs. The fingers lack webbing while the toes are webbed. Night-time coloration is lime green with indistinct stripes; the ventral parts are transparent. During the day, the coloration is more contrasting. Males have a single subgular vocal sac.[5]

The male advertisement call resembles a cricket chirp (and can be mistaken as such) and has very low intensity.[5]

The tadpoles have short, globular body and moderately long tail. The maximum total length is 32 mm (1.3 in).[5]

Habitat and conservation

Scarthyla vigilans occurs in open environments of lowlands, including flooded grasslands, degraded areas with low vegetation, and shallow standing water. Breeding takes place in standing water and swamps.[1] Its maximum altitude is about 600 m (2,000 ft) above sea level, although most records are from lower elevations.[5] It is a very common but nocturnal,[1] small, and inconspicuous species. The call is relatively low and easily masked by other calling frogs.[5] It is adaptable and not facing any known threats. It is present in some protected areas.[1]

References

  1. 1 2 3 4 IUCN SSC Amphibian Specialist Group (2021). "Scarthyla vigilans". IUCN Red List of Threatened Species. 2021: e.T55688A85903317. doi:10.2305/IUCN.UK.2021-1.RLTS.T55688A85903317.en. Retrieved 17 November 2021.
  2. 1 2 Frost, Darrel R. (2020). "Scarthyla vigilans (Solano, 1971)". Amphibian Species of the World: An Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 17 December 2020.
  3. 1 2 Barrio-Amorós, C. L.; Rojas-Runjaic, F. J. M. & Señaris, J. C. (2019). "Catalogue of the amphibians of Venezuela: Illustrated and annotated species list, distribution, and conservation" (PDF). Amphibian and Reptile Conservation. 13 (Special Section): 1–198.
  4. ↑ Acosta Galvis, A. R. (2020). "Scarthyla vigilans (Solano, 1971)". Lista de los Anfibios de Colombia: Referencia en linea V.10.2020. Retrieved 17 December 2020.
  5. 1 2 3 4 5 6 Barrio-Amorós, César L.; Díaz de Pascual, Amelia; Mueses-Cisneros, Jonh J.; Infante, Edwin & Chacón, Andrés (2006). "Hyla vigilans Solano, 1971, a second species for the genus Scarthyla, redescription and distribution in Venezuela and Colombia". Zootaxa. 1349 (1): 1–18. doi:10.11646/zootaxa.1349.1.1.
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