Megastomatohyla

Megastomatohyla is a genus of frogs in the family Hylidae. They are endemic to the cloud forests of central Veracruz and Oaxaca, Mexico.[2] All are rare species with restricted distributions.[3] The generic name is derived from Greek mega (="large") and stem of the genitive stomatos (="mouth"), referring to the enlarged oral disc of the tadpoles, juxtaposed with Hyla, the genus in which the four Megastomatohyla species were previously placed.[1] Common name large-mouthed treefrogs has been coined for this genus.[2]

Megastomatohyla
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Hylidae
Subfamily: Hylinae
Genus: Megastomatohyla
Faivovich et al., 2005[1]
Type species
Hyla mixe
Duellman, 1965
Species

4 species (see text)

Taxonomy and characteristics

Megastomatohyla was erected in 2005 as a part of a major revision of the Hylidae and corresponds to the former "Hyla mixomaculata group". The delination was based on molecular data. The only tentative morphological synapomorphy of the genus is the greatly enlarged oral disc of the tadpoles, which has 7–10 anterior rows and 10–11 posterior rows—in those species where this trait is known.[1]

Megastomatohyla are small stream-breeding frogs, reaching a maximum snout–vent length of about 37 mm (1.5 in).[4] Males do not call[3][4] and lack vocal slits, which could also be a synapomorphy. Males also lack nuptial excrescences on the thumb.[1] The tympanum is concealed.[3][4] The fingers are no more than one-third webbed, while the toes are at least three-fourths webbed.[4]

Species

The genus contains four recognized species:[2][5]

Binomial name and authorCommon name
M. mixe (Duellman, 1965)Mixe tree frog
M. mixomaculata (Taylor, 1950)variegated tree frog
M. nubicola (Duellman, 1964)cloud forest tree frog
M. pellita (Duellman, 1968)Oaxacan yellow tree frog

References
  1. Faivovich, Julián; Haddad, Célio F.B.; Garcia, Paulo C.A.; Frost, Darrel R.; Campbell, Jonathan A. & Wheeler, Ward C. (2005). "Systematic review of the frog family Hylidae, with special reference to Hylinae: phylogenetic analysis and taxonomic revision". Bulletin of the American Museum of Natural History. 294: 1–240. doi:10.1206/0003-0090(2005)294[0001:SROTFF]2.0.CO;2. hdl:2246/462.
  2. Frost, Darrel R. (2020). "Megastomatohyla Faivovich, Haddad, Garcia, Frost, Campbell, and Wheeler, 2005". Amphibian Species of the World: an Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 23 October 2020.
  3. Canseco Márquez, Luis; Aguilar López, José Luis; Luría Manzano, Ricardo; Gutiérrez Mayén, Guadalupe & Hernández Benitez, David (2018). "Rediscovery of two threatened species of treefrogs (Anura: Hylidae) from Southern Mexico". Herpetology Notes. 11: 23–29.
  4. Duellman, W. E. (1970). The hylid frogs of Middle America. Monograph of the Museum of Natural History, University of Kansas. 1(1). 1–753. doi:10.5962/bhl.title.2835. (Hyla mixomaculata group: p. 416)
  5. "Hylidae". AmphibiaWeb. University of California, Berkeley. 2020. Retrieved 23 October 2020.
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