Ololygon peixotoi

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Ololygon peixotoi
Systematics
Subordination : Neobatrachia
without rank: Tree frogs (arboranae)
Family : Tree frogs i. w. S. (Hylidae)
Subfamily : Knick-toe tree frogs i. w. S. (Scinaxinae)
Genre : Ololygon
Type : Ololygon peixotoi
Scientific name
Ololygon peixotoi
( Brasileiro , Haddad , Sawaya & Martins , 2007)

The neotropical frog Ololygon peixotoi ( synonym : scinax peixotoi ) belongs to the subfamily of scinax within the family of tree frogs . Its species name honors the herpetologist Oswaldo L. Peixoto, who was the first to recognize that S. peixotoi was an independent species.

According to Brasileiro et al. (2007) the species of the Scinax perpusillus species group and thus the Scinax catharinae clade according to Faivovich et al. (2005) assigned. This clade was raised to the independent genus Ololygon in 2016 .

distribution

The species is endemic to the 43 hectare island Queimada Grande , which is 33 km off the coast of Itanhaém on the south coast of the state of São Paulo . There the knick-toed tree frog can be found at heights over 50 m above sea level. NN.

description

Ololygon peixotoi is of medium size compared to other representatives of the Ololygon perpusilla species group. The males reach a head-torso-length (KRL) of 18.8 to 20.7 mm, the slightly larger females from 22.4 to 25.1 mm. The snout protrudes in a lateral view and appears pointed in a dorsal view. The head is slightly longer than it is wide, the canthus rostralis is pronounced and the eyes protrude a little. The tibia is the same size or larger than the KRL. There are stunted webbed feet between the first and second and between the second and third toes. The texture of the back skin is a little wrinkled. A photo of the species can be found in the first description by Brasileiro et al. (2007).

Ololygon peixotoi differs from the similar species Ololygon alcatraz , Ololygon arduous , Ololygon atratus , Ololygon littoreus , Ololygon melloi , Ololygon perpusilla and Ololygon v-signata not only in morphological differences (especially head-trunk length, size and shape of the head and the Snout), but also through its mating call.

Habitat and Ecology

Most of Queimada Grande is still covered with primary vegetation, the Mata Atlântica . This is also where the natural habitat of Ololygon peixotoi is found . Brasileiro et al. (2007) visited the island six times between 2001 and 2005 and could only prove reproduction in January 2002. The males call from leaves of terrestrial bromeliads at night .

Danger

The IUCN lists Ololygon peixotoi as “ critically endangered” because it has so far been found on an area of ​​less than 10 hectares, Queimada Grande is only 43 hectares and there is probably only one population. The species appears to be relatively rare on Queimada Grande and the bromeliads in which individuals were found were scattered. The Brazilian Navy cleared parts of the forest a few decades ago for fear of accidents with the island lance viper Bothrops insularis , another endemic of Queimada Grande. Since then, the habitat of Ololygon peixotoi has not been changed anthropogenically. The island of Queimada Grande is also under nature protection and is listed as "Area de Relevant Interest Ecológico", as an area of ​​particular ecological interest.

Individual evidence

  1. ↑ Julián Faivovich, Célio FB Haddad, PSA Garcia, Darrel R. Frost, JA Campbell & Ward C. Wheeler: Systematic review of the frog family Hylidae, with special reference to Hylinae: Phylogenetic analysis and taxonomic revision. Bulletin of the American Museum of Natural History, 294, 2005
  2. ^ William E. Duellman, AB Marion & S. Blair Hedges: Phylogenetics, classification, and biogeography of the treefrogs (Amphibia: Anura: Arboranae). Zootaxa, 4104, pp. 1–109, 2016
  3. ↑ [1] (PDF; 2.4 MB)

literature

  • Cinthia A. Brasileiro, Haddad, Célio FB, RJ Sawaya & M. Martins: A new and threatened species of Scinax (Anura: Hylidae) from Queimada Grande Island, southeastern Brazil . Zootaxa 1391, pp. 47-55, 2007
  • Cinthia A. Brasileiro: Ololygon peixotoi . In: IUCN (2008): IUCN Red List of Threatened Species . Version 2010.1. [2] , accessed November 19, 2013.
  • Julián Faivovich, Célio FB Haddad, PSA Garcia, Darrel R. Frost, JA Campbell & Ward C. Wheeler: Systematic review of the frog family Hylidae, with special reference to Hylinae: Phylogenetic analysis and taxonomic revision. Bulletin of the American Museum of Natural History, 294, 2005

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