Subfamily Holoadeninae Phylum Chordata Rank Genus | Family Craugastoridae Scientific name Euparkerella Higher classification Eleutherodactylidae Order Frog | |
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Lower classifications Euparkerella brasiliensis, Euparkerella robusta, Euparkerella tridactyla, Euparkerella cochranae | ||
Euparkerella is a genus of craugastorid frogs. The common name coined for them is Guanabara frogs. They are endemic to Atlantic coastal forests in the southeastern Brazilian states Espírito Santo and Rio de Janeiro. The name Euparkerella honours H. W. Parker, a herpetologist who named the type species, with the Greek prefix eu meaning true and suffix ella, a diminutive form.
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Taxonomy
The phylogenetic position of Euparkerella is uncertain as they have not been included in any molecular phylogeny. On the basis of their morphological similarity to Holoaden, they are provisionally placed in subfamily Holoadeninae. The AmphibiaWeb keeps Holoadeninae, and consequently Euparkerella, in Strabomantidae, a family no longer recognized by the Amphibian Species of the World.
Euparkerella species are traditionally distinguished using morphological traits. However, these species do not align well with genetically distinct units, with the latter suggesting higher diversity than the former, especially within Euparkerella brasiliensis and Euparkerella cochranae. It remains unresolved whether the genetically distinct units qualify as different species.
Description
Euparkerella are small frogs, growing to 22 mm (0.87 in) snout–vent length at most. The digits are extremely reduced, compared to those of their larger relatives. Head is narrower than the body. Differentiated tympanic membrane and tympanic annulus are absent. Dorsum is finely granular. Venter is areolate.
Species
There are four recognized species in this genus: