Scinax alcatraz
The neotropical Froschlurch Scinax alcatraz belongs to the subfamily Hylinae within the family of tree frogs. Within the genus Scinax the type is counted to the Scinax Catharinae clade.
Synonyms
- Hyla Catharinae alcatraz Lutz, 1973
- Ololygon alcatraz Peixoto, 1988
Duellman & Wiens (1992 ) found the species in the genus Scinax.
Dissemination
This species is endemic to the island of Alcatraz ( Ilha de Alcatrazes ), which lies off the coast of the Brazilian state of São Paulo. The highest point of the island is about 100 m above sea level. NN.
Description
This kink toes tree frog has a head-body length of only 20-32 mm, however, is built quite robust for its size. He is pale yellow brown in color and inconspicuous patterned. The head is large, oval and wider in front and behind the eyes. Seen from above, the muzzle pointed to the front. The canthus is straight. The eyes protrude and are smaller than the distance from them to the tip of the snout. The eardrum is very strong, reaching to about 3/ 8 of the eye diameter. The tongue is round and notched. The adhesive discs of the fingers and toes are small and spatulate. However, between the toes has the kind webbed between fingers none. A callus is under the first finger, the greater in the third and fourth. Chest, abdomen and central parts of the legs are granulated.
Habitat and Ecology
Scinax alcatraz lives in primary forests and secondary forests and has also been found in more degraded forest. The reproduction habitat and the mode of reproduction are unknown. It is believed that the type is propagated by larval development in the water.
Endangering
The IUCN lists Scinax alcatraz as " threatened with extinction " ( Critically Endangered ), because its circulation area covers the island, depending on the calculation in only about 10-100 km ². The total population size is unknown but it is assumed that a declining population trend. A total population size estimation is necessary. In the past, the island was also used as a military base, but this is no longer the case today. Although the island is uninhabited today, represent tourism and fires current main hazards which lead to narrowing and deterioration of the habitat of the species. On the island there also is no reserve.