Cardoso and Haddad (1984) discussed geographically coherent acoustic differences among populations. Kaplan (1994) suggested that Dendropsophus minutus is a complex of species. The general diagnosis is: head short, snout rounded; dorsum orange, brown or tan, usually with a pair of dorso-lateral stripes that can be simple or elaborate. Belly whitish. Throat yellow in males and white in females. Coloured thighs, mainly in the females. Tympanum indistinct (Cei 1980; Kwet 1999; Bastos 2003).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Trinidad and Tobago, Uruguay, Venezuela
D. minutus has a widespread distribution from the lowlands east of the Andes from Colombia, Venezuela, and Trinidad southward through Ecuador, Peru and Brazil to Bolivia, Uruguay, until Argentina, up to 2000 m elevation (Frost 2004). This species may be considered very versatile, according to its wide range in latitude as well as in altitude (Cei 1980). It is an arboreal species but during breeding time it is commonly found in open grasslands near shallow waters.
Life History, Abundance, Activity, and Special Behaviors
Hemipterans and Aranaea are important components of the diet of D. minutus, but individuals of Homoptera and Diptera can also be part of the diet (Sluys & Rocha 1998).
Males usually call from grass, emergent aquatic plants, or low shrubs next to the water. Their short, shrill calls produce loud mass concerts, heard from dusk until after midnight (Kwet 1999). Kwet (2001) registered a dominant frequency of 3600-5800 Hz, and 4040-4840 Hz as maximum. Two mating strategies have been reported: the calling male and the satellite male (Haddad 1991). Territorially disputes were observed by Cardoso & Haddad (1984); different calls and physical combat behavior to defend calling sites have been observed by Haddad (1987). The amplexus is axilar. Egg-laying occurs in standing water bodies, such as ponds or large puddles. Spawning period from September to February (Kwet 1999).
The larval morphology was studied by Vizotto (1967) and the microanatomy of the buccal apparatus and oral cavity were described by Echeverria (1997).
The tadpole is characterized by its high orange and black coloured tail fin and a dark line ranging from snout to eye. It is free-swimming and feeds mainly on algae (Kwet 1999). Tadpoles raised in laboratory were observed to feed on commercial fish food and plant material. Peixoto (1997) suggested that tadpoles of D. minutus could be facultatively carnivorous.
Possible reasons for amphibian decline
General habitat alteration and loss
Habitat modification from deforestation, or logging related activities
Intensified agriculture or grazing
Predators (natural or introduced)
Dendrosophus brevifrons differs by having a white horizontal bar below the eyes, and a brown dorsum without hourglass markings.
This species was previously within the genus Hyla but has recently been moved to the resurrected genus Dendropsophus (Faivovich, et al., 2005). It is likely a complex of several species.
Bastos, R. P., Motta, J. A., Lima, L. P., and Guimaraes, L. D. (2003). Anfíbios da Floresta Nacional de Silvânia, Estado de Goiás. Stylo Gráfica e Editora, Goiânia.
Cardoso, A. J., and Haddad, C.F.B. (1984). ''Variabilidade acústica em diferentes populações e interações agressivas de Hyla minuta (Amphibia, Anura).'' Ciência e Cultura, 36(8), 1393-1399.
Cei, J. M. (1980). ''Amphibians of Argentina.'' Monitore Zoologica Italiano, New Series Monografia, Firenze, 2, 1-609.
Echeverria, D. D. (1997). ''Microanatomy of the buccal apparatus and oral cavity of Hyla minuta Peters, 1872 larvae (Anura, Hylidae), with data on feeding habits.'' Alytes, 15, 26-36.
Faivovich, J., Haddad, C. F. B., Garcia, P. C. A., Frost, D. R., Campbell, J. A., and Wheeler, W. 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.
Frost, D. R. (2003). ''Amphibian Species of the World: An Online Reference.'' Electronic database available at http://research.amnh.org/herpetology/amphibia/index.html. American Museum of Natural History, New York, USA.
Haddad, C. F. B. (1987). Comportamento reprodutivo e comunicacao sonora de Hyla minuta Peters, 1872 (Amphibia, Anura, Hylidae). Unpublished Master's thesis, Universidad Estadual de Campinas, São Paulo.
Haddad, C. F. B. (1991). ''Satellite behavior in the Neotropical treefrog Hyla minuta.'' Journal of Herpetology, 25, 226-229.
Izecksohn, E., and Carvalho-e-Silva, S. P. (2001). Anfíbios do Município do Rio de Janeiro. Editora UFRJ, Rio de Janeiro.
Kaplan M. (1994). ''A new species of frog of the genus Hyla from the Cordillera Oriental in northern Colombia with comments on the taxonomy of Hyla minuta.'' Journal of Herpetology, 28(1), 79-87.
Kwet, A. (2001). Frösche im brasilianischen Araukarienwald. Natur und Tier-Verlag, Münster.
Kwet, A. and Di-Bernardo, M. (1999). Anfíbios - Amphibien - Amphibians. EDIPUCRS, Porto Alegre.
Peixoto, O. L., and Gomes, M. R. (1997). ''Hyla minuta: tadpole behavior.'' Herpetological Review, 28(3), 146-147.
Rocha, C. F. D., and Van Sluys, M. (1998). ''Feeding habits and microhabitat utilization by two syntopic Brazilian Amazonian frogs (Hyla minuta and Pseudopaludicula sp. (gr. falcipes).'' Rev. Brasil. Biol., 58(4), 559-562.
Vizotto, L. D. (1967). Desenvolvimento de Anuros da regiao norte-ocidental do estado de Sao Paulo. Unpublished thesis, Faculdade de Filosofia, Ciências e Letras, Zoologia, São Paulo.
Written by Camila Both, Geraldo Carvalho & Mirco Sole (mirco.sole AT uni-tuebingen.de), Zoological Institute, University of Tuebingen
First submitted 2004-05-27
Edited by Tate Tunstall (2014-03-04)
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