Brachycephalus olivaceus

Short description: Species of frog

Brachycephalus olivaceus

Scientific classification
Kingdom:  | Animalia
Phylum:  | Chordata
Class:  | Amphibia
Order:  | Anura
Family:  | Brachycephalidae
Genus:  | Brachycephalus
Species:  |

B. olivaceus

Binomial name
Brachycephalus olivaceus

Ribeiro et al., 2015

Brachycephalus olivaceus is a species of frog in the family Brachycephalidae. It is very tiny and was one of seven new species described by LF Ribeiro and a team of scientists from the Mater Natura - Instituto de Estudos Ambientais in Brazil. Like all species in its genus, it is found in a very small strip of Atlantic Forest in the southeastern coast of the country, and has a vibrant colour pattern.[1] The speciation seen in this genus is thought to be a byproduct of the rift between the valley versus mountain terrain and its particular microclimates, to which they are adapted. It might be in population decline due to habitat loss.[2] Its name derives from the Latin olivaceus, "olive-colored", in reference to its coloration.

## Contents

* 1 Description
* 2 Distribution
* 3 References
* 4 Further reading
* 5 External links

## Description

It is distinguished from other cogenerate species by having a robust body, bufoniform, with an adult length between 9.4 and 12.9 millimetres (0.37 and 0.51 in); a rough dorsum, and its general coloration being predominantly dark-green to brown. The skin on its dorsum shows no dermal co-ossification. Its rugose body is similar to that of B. mariaeterezae (as opposed to the smooth dorsum of other species such as B. izecksohni or B. pernix. Its predominantly dark-green dorsum is distinct from all other Brachycephalus species. The species does not present dermal co-ossification characteristic of species within the phippium group, while its bufoniform shape and larger body size means it is rather larger than those in the didactylus group, averaging a length of between 8 and 10 millimetres (0.31 and 0.39 in) and in turn having leptodactyliform body shape.[1]

## Distribution

Brachycephalus olivaceus is known only from two localities, which are the base of the Serra Queimada and Castelo dos Bugres, a notable rock formation in the northeastern State of Santa Catarina.[1]

## References

1. ↑ 1.0 1.1 1.2 Ribeiro, Luiz F.; Bornschein, Marcos R.; Belmonte-Lopes, Ricardo; Firkowski, Carina R.; Morato, Sergio A.A.; Pie, Marcio R. (2015). "Seven new microendemic species ofBrachycephalus(Anura: Brachycephalidae) from southern Brazil". PeerJ 3: e1011. doi:10.7717/peerj.1011. ISSN 2167-8359. PMID 26056613.
2. ↑ Webb, Jonathan (4 June 2015). "Seven tiny frog species found on seven mountains". BBC News. https://www.bbc.com/news/science-environment-32991586.

## Further reading

* Clemente-Carvalho, Rute BG (2011). "Molecular phylogenetic relationships and phenotypic diversity in miniaturized toadlets, genus Brachycephalus (Amphibia: Anura: Brachycephalidae)". Molecular Phylogenetics and Evolution 61 (1): 79–89. doi:10.1016/j.ympev.2011.05.017. PMID 21693192. http://sedici.unlp.edu.ar/handle/10915/83916.
* Da Silva, Helio Ricardo; Campos, Leandro Ambrósio; Sebben, Antonio (2007). "The auditory region of Brachycephalus and its bearing on the monophyly of the genus (Anura: Brachycephalidae)". Zootaxa 1422: 59–68. doi:10.11646/zootaxa.1422.1.4. http://direct.biostor.org/reference/17251.

## External links

* Photos from the 7 new species

Wikidata ☰ Q20049477 entry

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