Scinax peixotoi
The neotropical Froschlurch Scinax peixotoi belongs to the subfamily Hylinae within the family of tree frogs. Its name honors the herpetologists Oswaldo L. Peixoto, who first recognized that it peixotoi is a unique species S..
After Brasileiro et al. (2007) the Scinax - perpusillus - group of species, and thus the Scinax - Catharinae clade after Faivovich et al. Assigned (2005).
Dissemination
The species is endemic to the 43 -acre island Queimada Grande, which is located on the south coast of São Paulo State, 33 km off the coast of Itanhaém. There you find the crease toes tree frog at heights over 50 m above sea level. NN.
Description
Scinax peixotoi is compared to other members of the Scinax perpusillus - species group of medium size. The males reach a snout-vent length ( SVL ) of 18.8 to 20.7 mm, the slightly larger females from 22.4 to 25.1 mm. The muzzle protrudes in lateral view and appears sharp in dorsal view. The head is slightly longer than broad, the canthus pronounced and the eyes are pushed out. The tibia is equal to or greater than the SVL. It can be found vestigial webbing between the first and second and between the second and third toe. The texture of the back skin is slightly wrinkled. A photo of the kind found in the original description in Brasileiro et al. (2007 ) (PDF, 2.4 MB). Scinax peixotoi alcatraz differs from the similar S., S. arduous, S. atratus, S. littoreous, p melloi, p perpusillus and S. v - signatus not only by morphological differences (especially KRL, size and shape of the head and the snout ), but also by its mating call.
Habitat and Ecology
The largest part of Queimada Grande is still covered with primary vegetation, the Mata Atlântica. Here there is also the natural habitat of S. peixotoi. Brasileiro et al. (2007) visited the island six times between 2001 and 2005 and were able to demonstrate reproduction only in January 2002. Males call at night from leaves of terrestrial bromeliads.
Endangering
The IUCN lists Scinax peixotoi as " critically endangered " ( Critically Endangerd ) because he has been found in an area of less than 10 ha, Queimada Grande is only 43 ha small and there is probably only one population. The species seems to Queimada Grande to be relatively rare and the bromeliads, where individuals found were distributed scattered. The Brazilian Navy rodete for fear of accidents with the island Pitviper Bothrops insularis, another endemic species of Queimada Grande, some decades ago parts of the forest. Since then, the habitat of S. peixotoi has not been altered anthropogenically. The island Queimada Grande also is a nature reserve and is called " Área de Relevant Ecological Interest " listed as an area of special environmental interest.