# Dryaderces

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***Dryaderces*** is a small genus of [frogs](/source/Frog) in the family [Hylidae](/source/Hylidae).[2][3] Their known distribution is disjunct, with one species found in the upper Amazon Basin and lower Andean slopes between central Peru and Amazonian Bolivia, and another one in [Pará](/source/Par%C3%A1), Brazil. Its [sister taxon](/source/Sister_taxon) is *[Osteocephalus](/source/Osteocephalus)*.[2] No phenotypic [synapomorphies](/source/Synapomorphy) defining the genus are known.[1]

## Etymology

The generic name *Dryaderces* is derived from Ancient Greek *dryad* (=tree) and *aderces* (=unseen, invisible), thus meaning "unseen in a tree".[1]

## Description

*Dryaderces* are medium-sized frogs; adult males can grow to 50 mm (2.0 in) and adult females to 68 mm (2.7 in) in snout–vent length. They are pond breeders. Males have only scattered, non-spinous tubercles on the [dorsum](/source/Dorsum_(anatomy)) (pond-breeding *Osteocephalus* have heavily tuberculate dorsum, with the tips of the tubercles keratinized). Females have smoother backs. Juvenile coloration resembles adult coloration (different in *Osteocephalus*).[1][4]

## Species

There are two species:[2][3]

- *[Dryaderces inframaculata](/source/Dryaderces_inframaculata)* (Boulenger, 1882)
- *[Dryaderces pearsoni](/source/Dryaderces_pearsoni)* (Gaige, 1929)

Before *Dryaderces* was erected, these two species were placed in *Osteocephalus*.[4] There is at least one undescribed species belonging to this genus.[1]

## References

1. Jungfer, Karl-Heinz; Faivovich, Julián; Padial, José M.; Castroviejo-Fisher, Santiago; Lyra, Mariana M.; V. M. Berneck, Bianca; Iglesias, Patricia P.; Kok, Philippe J. R.; MacCulloch, Ross D. et al. (2013). "Systematics of spiny-backed treefrogs (Hylidae: *Osteocephalus*): an Amazonian puzzle". *Zoologica Scripta*. **42** (4): 351–380. [CiteSeerX 10.1.1.720.3338](https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.720.3338). [doi:10.1111/zsc.12015](https://doi.org/10.1111/zsc.12015). [S2CID 84789142](https://api.semanticscholar.org/CorpusID:84789142)

1. Frost, Darrel R. (2018). ["*Dryaderces* Jungfer, Faivovich, Padial, Castroviejo-Fisher, Lyra, Berneck, Iglesias, Kok, MacCulloch, Rodrigues, Verdade, Torres-Gastello, Chaparro, Valdujo, Reichle, Moravec, Gvoždík, Gagliardi-Urrutia, Ernst, De la Riva, Means, Lima, Señaris, Wheeler, and Haddad, 2013"](http://research.amnh.org/vz/herpetology/amphibia/Amphibia/Anura/Hylidae/Lophyohylinae/Dryaderces). *Amphibian Species of the World: an Online Reference. Version 6.0*. American Museum of Natural History. Retrieved 25 February 2018.

1. ["Hylidae"](http://www.amphibiaweb.org/lists/Hylidae.shtml). *AmphibiaWeb*. University of California, Berkeley. 2018. Retrieved 25 February 2018.

1. Hoogmoed, Marinus (2013). "Rediscovery of the rare tree frog *Hyla inframaculata* Boulenger, 1882 (Anura: Hylidae), in Amazonian Brazil with notes on variation and distribution, and its generic allocation". *Amphibia-Reptilia*. **34** (3): 421–432. [doi:10.1163/15685381-00002907](https://doi.org/10.1163/15685381-00002907)

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Adapted from the Wikipedia article [Dryaderces](https://en.wikipedia.org/wiki/Dryaderces) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Dryaderces?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.