''Adelophryne mucronatus'' is a species of frog in the family Eleutherodactylidae. It is endemic to the coastal areas of the Bahia state in eastern Brazil; it is known from the municipalities of Itacaré, Ilhéus, and Una. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

''mucronatus'' is derived from Latin and means "pointed", referring to the pointed fingers tips of this frog.

Description

Adult males measure and adult females in snout–vent length. The snout is rounded. The tympanum is small but distinct, including a complete annulus. The canthus rostralis is indistinct. The fingers have no webbing nor discs, but they have pointed tips. The toes have no webbing but have pointed tips; toes III and IV bear discs. Skin is smooth with scattered small granules. The dorsal coloration varies from reddish brown (with or without dark brown spots) to homogeneous bluish gray. There may be irregular dark patches, inter-orbital lines, or a mid-dorsal Y-like pattern. The iris is reddish brown to yellowish brown.

Behavior

When approached, adult frogs exhibit a mouth-gaping behavior: the frog keeps it mouth open for about 15 seconds. This is interpreted as a defensive behavior. A specimen was observed feeding on ants using its tongue; this is in agreement with stomach content observations in other ''Adelophryne''. The male advertisement call consists of a single note lasting about 30 milliseconds. The dominant frequency is 5300 Hz. Calling males were observed from February to September, but greatest activity was from June onward. Females were found with few (2 or 3) but large eggs in their ovaries.

Habitat and conservation

''Adelophryne mucronatus'' occurs in shaded areas of primary and disturbed forests at elevations of

above sea level Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The comb ...

. It lives under dense leaf litter. Males call between late afternoon and midnight from the ground beneath fallen, wet leaves, or from beneath leaves of terrestrial

bromeliad The Bromeliaceae (the bromeliads) are a family of monocot flowering plants of about 80 genera and 3700 known species, native mainly to the tropical Americas, with several species found in the American subtropics and one in tropical west Africa, ...

s. The species is known from three localities. While it also occurs in disturbed forests, it is more abundant and the breeding season is longer in pristine ones. It is threatened by deforestation.

References

{{Taxonbar, from=Q2824235 mucronatus Endemic fauna of Brazil Amphibians of Brazil Amphibians described in 2012