''Craugastor aphanus'' is a species of

frog A frog is any member of a diverse and largely semiaquatic group of short-bodied, tailless amphibian vertebrates composing the order (biology), order Anura (coming from the Ancient Greek , literally 'without tail'). Frog species with rough ski ...

in the family

Craugastoridae Craugastoridae, commonly known as fleshbelly frogs, is a family of New World direct-developing frogs. As delineated here, following the Amphibian Species of the World, it contains 129 species. They are found from the southern United States south ...

. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the

Sierra del Mico The Sierra del Mico (or Montañas del Mico) is a small mountain range northeast of the Sierra de las Minas, near Puerto Barrios. It is approximately 60 km long and drops eastwards into the Caribbean sea. Its highest peak is the Cerro San Gi ...

and

Sierra de las Minas Sierra de las Minas is a mountain range in eastern Guatemala which extends 130 km west of the Lake Izabal. It is 15–30 km wide and bordered by the valleys of the Polochic River in the north and the Motagua River in the south. Its we ...

ranges in the

Izabal Department Izabal () is one of the 22 departments of Guatemala. Its coastal areas form part of the homeland of the Garifuna people. Izabal is bordered to the north by Belize, to the northeast by the Gulf of Honduras, to the east by Honduras, and by th ...

of eastern

Guatemala Guatemala, officially the Republic of Guatemala, is a country in Central America. It is bordered to the north and west by Mexico, to the northeast by Belize, to the east by Honduras, and to the southeast by El Salvador. It is hydrologically b ...

Description

Adult males measure and females in snout–vent length. In addition to the marked

sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di ...

in size, males differ from females by having a relatively larger tympanum that is round as opposed elongated, and in coloration: the dorsum of adult females is medium or dark brown, whereas that of juveniles and males is usually paler and often with some yellow, orange, or reddish brown hue, occasionally dark olive brown. Even more strikingly, the venter is yellowish in males and purplish in females. The skin of the dorsum is smooth but has prominent

occipital The occipital bone () is a cranial dermal bone and the main bone of the occiput (back and lower part of the skull). It is trapezoidal in shape and curved on itself like a shallow dish. The occipital bone lies over the occipital lobes of the cere ...

folds that extend from the posterior edge of upper eyelids to above the

scapula The scapula (: scapulae or scapulas), also known as the shoulder blade, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone). Like their connected bones, the scapulae are paired, with each scapula on either side ...

e. Neither fingers nor toes are webbed but they bear small discs.

Habitat and conservation

Its natural

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

is low-altitude (

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

)

cloud forest A cloud forest, also called a water forest, primas forest, or tropical montane cloud forest, is a generally tropical or subtropical, evergreen, Montane forest, montane, Tropical and subtropical moist broadleaf forests, moist forest characteri ...

. Although much of its habitat is within a protected area, small-scale wood extraction is taking place and the species is known from only from two locations.

References

{{Taxonbar, from=Q1593319 aphanus Amphibians described in 1994 Taxa named by Jonathan A. Campbell Endemic fauna of Guatemala Amphibians of Guatemala Taxonomy articles created by Polbot