This frog is known from the State of Amazonas, Brazil, where it occurs south of Manaus in the vicinity of large rivers, including the Rio Amazon and Rio Negro (Lima et al. 2010; A. Lima & I. Kaefer pers. comm. October 2010). It has been found between 40 and 60 m asl. Ongoing research in this region may reveal this recently-described species to have a greater extent of occurrence than is currently recognized (I. Kaefer pers. comm. October 2010).
Habitat and Ecology
This frog occurs in old-growth lowland rainforest, and is apparently restricted to fragments which were formerly subject to seasonal flooding (paleovárzea) (A. Lima & I. Kaefer pers. comm. October 2010). The species is replaced by related forms in dry (terra firme) and seasonally flooded forest (Lima et al. 2010). This leaf litter frog uses pools within both permanent and temporary forest streams for larval development (A. Lima & I. Kaefer pers. comm. October 2010).
This is a common species at known sites, and monitoring at two localities since its discovery suggests populations have been stable over a period of at least three years (A. Lima & I. Kaefer pers. comm. October 2010). At least one population is confined to fragments of suitable forest isolated by deforestation, but this fragmentation is thought to be a localized phenomenon (A. Lima & I. Kaefer pers. comm. October 2010).
A population close to the city of Manaus may be at risk from deforestation resulting from road-building and consequent urban development (I. Kaefer pers. comm. December 2010). Logging and mining are also thought to represent localized threats to this species (A. Lima & I. Kaefer pers. comm. October 2010).
No conservation actions are currently known or proposed for this species. This frog occurs in at least one protected area, APA da Margem Direita do Rio Negro (A. Lima & I. Kaefer pers. comm. October 2010), and known threats are thought to be localized within this species' range. More information is needed on this species' extent of occurrence, area of occupancy, population status, and the specific identity of subpopulations included in this assessment.
Red List Status
Near Threatened (NT)
Listed as Near Threatened because, while it is abundant and probably widespread within its range and existing threats are limited, its known extent of occurrence is only 5,800 km2 and there is a continuing, if localized, decline in the quality and extent of its habitat, thus making the species close to qualifying for Vulnerable.
Allobates was formerly included within Dendrobatidae (Grant et al. 2006). Three populations assigned to this species in the original description are included only tentatively (Lima et al. 2010), and the taxonomy of this species remains to be resolved (A. Lima & I. Kaefer pers. comm. October 2010).
IUCN SSC Amphibian Specialist Group, 2012. Allobates paleovarzensis. The IUCN Red List of Threatened Species 2012: e.T190492A1953619. http://dx.doi.org/10.2305/IUCN.UK.2012-1.RLTS.T190492A1953619.en .Downloaded on 15 November 2018