:Megaelosia

{{Speciesbox

| name = Rio big-tooth frog

| image =

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Sergio Potsch de Carvalho-e-Silva, Ana Maria Telles |date=2004 |title=Megaelosia goeldii |volume=2004 |page=e.T57182A11581805 |doi=10.2305/IUCN.UK.2004.RLTS.T57182A11581805.en |access-date=16 November 2021}}

| parent_authority = Miranda-Ribeiro, 1923

| taxon = Megaelosia goeldii

| authority = (Baumann, 1912)

| synonyms = Hylodes goeldii Baumann, 1912

}}

Megaelosia goeldii, also known as the Rio big-tooth frog, is a species of frog in the family Hylodidae. It is the only member of the genus Megaelosia.{{Cite web |title=Megaelosia Miranda-Ribeiro, 1923 |website=Amphibian Species of the World |url=https://amphibiansoftheworld.amnh.org/Amphibia/Anura/Hylodidae/Megaelosia |access-date=2022-09-11}} It is endemic to Southeast Brazil and occurs in São Paulo and Rio de Janeiro states. It is named after Émil Goeldi, a Swiss zoologist who worked in Brazil.

Taxonomy

The genus Megaelosia formerly contained several other species, but all of these were reclassified in a new genus, Phantasmarana, in 2021 based on a phylogenetic study, leaving M. goeldii as the only remaining member of Megaelosia.{{Cite web |title=Megaelosia Miranda-Ribeiro, 1923 |website=Amphibian Species of the World |url=https://amphibiansoftheworld.amnh.org/Amphibia/Anura/Hylodidae/Megaelosia |access-date=2022-09-11}}{{Cite web |title=Phantasmarana Vittorazzi, Augusto-Alves, Neves-da-Silva, Carvalho-e-Silva, Recco-Pimentel, Toledo, Lourenço, and Bruschi, 2021 |website=Amphibian Species of the World |url=https://amphibiansoftheworld.amnh.org/Amphibia/Anura/Hylodidae/Phantasmarana |access-date=2022-09-11}}{{Cite web |author=Vittorazzi, S. E. |author2=G. Augusto-Alves |author3=D. Neves-da-Silva |author4=A. M. P. T. de Carvalho-e-Silva |author5=S. M. Recco-Pimentel |author6=L. F. Toledo |author7=L. B. Lourenço |author8=D. P. Bruschi |date=2021 |title=Paraphyly in the giant torrent-frogs (Anura: Hylodidae: Megaelosia) and the description of a new genus. |url=https://www.salamandra-journal.com/index.php/home/contents/2021-vol-57/2032-vittorazzi-s-e-g-augusto-alves-d-neves-da-silva-a-m-p-t-de-carvalho-e-silva-s-m-recco-pimentel-l-f-toledo-l-b-lourenco-d-p-bruschi |access-date=2022-09-11 |website=www.salamandra-journal.com}}

Description

Males measure {{convert|82|-|95|mm|abbr=on}} and females {{convert|85|-|97|mm|abbr=on}} in snout–vent length (based on 2 males and 3 females only). The dorsolateral skin is granular. The snout is subacuminate in dorsal view and protruding in profile. The canthus rostralis is evident and straight. Males have neither vocal sacs nor vocal slits.

Diet

Stomach contents have been found to contain insects (cockroaches, Coleoptera, lepidopteran caterpillars), earthworms, and plant material. In experiments, Megaelosia goeldii have consumed other frogs.

Habitat and conservation

Its natural habitats are rivers in primary forest. During the day, they can be found on emergent rocks in shallow places. Tadpoles have been collected under large rocks in a moderate-sized forest stream.

Megaelosia goeldii is a common species, but very difficult to catch. It is threatened by habitat loss caused by forest clearance and infrastructure development, and by pollution.

References

{{Reflist|30em|refs=

{{cite book|author1=Bo Beolens|author2=Michael Watkins|author3=Michael Grayson|title=The Eponym Dictionary of Amphibians|url=https://books.google.com/books?id=ZZY3BAAAQBAJ&pg=PT135|date=22 April 2013|publisher=Pelagic Publishing|isbn=978-1-907807-42-8|page=135}}

{{cite web |url=http://research.amnh.org/vz/herpetology/amphibia/Amphibia/Anura/Hylodidae/Megaelosia/Megaelosia-goeldii |title=Megaelosia goeldii (Baumann, 1912) |author=Frost, Darrel R. |year=2016 |work=Amphibian Species of the World: an Online Reference. Version 6.0 |publisher=American Museum of Natural History |access-date=2 July 2016}}

{{cite journal|last1=Giaretta|first1=Ariovaldo A.|last2=Bokermann|first2=Werner C. A.|last3=Haddad|first3=Celio F. B. |year=1993 |title=A review of the genus Megaelosia (Anura: Leptodactylidae) with a description of a new species |journal=Journal of Herpetology |volume=27 |issue=3 |pages=276–285 |doi=10.2307/1565148|jstor=1565148}}

}}{{Taxonbar|from=Q2521762}}{{Taxonbar|from=Q2239267}}

Category:Hylodidae

Category:Endemic frogs of Brazil

Category:Taxonomy articles created by Polbot

Category:Taxa named by Alípio de Miranda-Ribeiro

Category:Monotypic amphibian genera