''Oreobates quixensis'', also known as the common big-headed frog, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

frog A frog is any member of a diverse and largely Carnivore, carnivorous group of short-bodied, tailless amphibians composing the order (biology), order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-f ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Strabomantidae The Strabomantidae are a family of frogs native to South America. These frogs lack a free-living larval stage and hatch directly into miniature "froglets". This family includes ''Pristimantis'', the most speciose genus of any vertebrate. System ...

. It is found in the upper

Amazon Basin The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Bolivi ...

in Bolivia, western Brazil, Colombia, Ecuador, and Peru. It is a very common terrestrial frog of

primary Primary or primaries may refer to: Arts, entertainment, and media Music Groups and labels * Primary (band), from Australia * Primary (musician), hip hop musician and record producer from South Korea * Primary Music, Israeli record label Works * ...

and

secondary Secondary may refer to: Science and nature * Secondary emission, of particles ** Secondary electrons, electrons generated as ionization products * The secondary winding, or the electrical or electronic circuit connected to the secondary winding i ...

tropical moist forest, also to be found in clearings, open areas and banana groves.

Description

''Oreobates quixensis'' are large among the species of the genus ''Oreobates'' with adults measuring in

snout–vent length Snout–vent length (SVL) is a morphometric measurement taken in herpetology from the tip of the snout to the most posterior opening of the cloacal slit (vent)."direct line distance from tip of snout to posterior margin of vent" It is the most c ...

. The head is large and wider than long; the snout is short. The dorsum is pale brown to dark brown with purple tonalities and cream flecks; the skin is granular, with round keratinized granules and small, sparse, prominent, and enlarged warts. Breeding is by direct development. Gravid females contain 15–51 eggs.

References

{{Taxonbar, from=Q1610069 quixensis Amphibians of Bolivia Amphibians of Brazil Amphibians of Colombia Amphibians of Ecuador Amphibians of Peru Taxa named by Marcos Jiménez de la Espada Amphibians described in 1872 Taxonomy articles created by Polbot