A new species of Scinax Wagler, 1830 belonging to the S. catharinae species group is described from the state of Goiás, in the Cerrado Biome, Brazil. Scinax skaios sp. nov. is characterized by short snout-vent length (males ranging 23.2-29.6 mm; females 30.7- 36.1 mm), snout subovoid in dorsal view and protruding in lateral view; no tubercle on canthus rostralis; an inverted triangular interorbital blotch; no externally expanded vocal sac; dorsal skin texture moderately rugose; absence of a thick externally well differentiated inguinal gland; hidden areas of the thigh with vermiculate color pattern. The descriptions of the vocalizations are provided
The current note reports the presence of Odontophrynus moratoi at municipality of São Carlos, state of São Paulo, southeastern Brazil. This is the third known locality of occurence of this cycloramphid frog considered threatened of extinction.
ABSTRACT. We studied the pattern of habitat use by the tree frog Scinax aff. perereca. Fieldworks were performed from August 1996 to August 1997 at Parque das Mangabeiras, Belo Horizonte, State of Minas Gerais, southeastern Brazil. Calling males were observed in September, October and December 1996, February to April and June 1997. Females were found only in October 1996. Specimens were found perched on vegetation, on the ground or on stones near waterfall. At Parque das Mangabeiras, S. aff. perereca occupied nine types of substrata. The most frequently used substrata were shrubs, stones at the stream edges, and fallen trunks. The pattern of spatial occupation varied among months. Males were found calling in aggregations on the vegetation and spatial niche breadth was related to species abundance. KEYWORDS.Hylidae, Scinax, habitat use, Atlantic forest, environment.RESUMO. Uso do hábitat por uma espécie de Scinax (Amphibia, Hylidae) em um fragmento florestal urbano no sudeste do Brasil. No presente estudo é tratado o uso do hábitat por Scinax aff. perereca, durante o período de agosto de 1996 a agosto de 1997 em uma área de mata urbana em Belo Horizonte, Minas Gerais, sudeste do Brasil. Machos em atividade de vocalização foram encontrados em setembro, outubro e dezembro de 1996 e de fevereiro a abril e junho de 1997. As fêmeas foram capturadas apenas em outubro de 1996. Os indivíduos foram encontrados em galhos da vegetação no solo ou em pedras próximas a quedas de água. Na área estudada, S. aff. perereca usa nove tipos de substratos, sendo os mais freqüentes a vegetação herbácea, pedras na margem do riacho e troncos caídos. O padrão de ocupação espacial variou ao longo dos meses. Os machos foram encontrados vocalizando em agregados e a largura de nicho espacial foi diretamente relacionada a abundância da espécie. PALAVRAS-CHAVE.Hylidae, Scinax, uso do habitat, Mata Atlântica.Habitat is one of the three main categories of resource dimension of animals (PIANKA, 1973) and can be divided in two subcategories: macro and microhabitat. Generally, it is the first resource dimension partitioned among amphibians (TOFT, 1985). For example, CRUMP (1974) assumed that spatial partitioning enabled the coexistence of 74 anuran species at Santa Cecilia, Ecuador. KRZYSIK (1977) and KRZYSIK & MILLER (1979) showed that substratum particle size is an important microhabitat parameter to determine the coexistence patterns within desmognathine salamanders. Hence, information about habitat use of a given species could be helpful in understanding other aspects of its biology, as well as the structure of the community it belongs to.Knowledge of habitat use by tropical anuran species is restricted to descriptive information in studies of communities (e.g. CARDOSO et al., 1989;HEYER et al., 1990;HADDAD & SAZIMA, 1992;NASCIMENTO et al., 1994;POMBAL, 1997). Studies on spatial organization of anuran populations are nearly unknown for Brazilian species. Nonetheless, ETEROVICK (1999) performed a quantitative analysis on the use of bromeliads as...
A new species of Scinax of central Brazil, closer to the Scinax maracaya (Cardoso & Sazima), from the Cerrado biome (open formations) is described. This new species is characterized by the following combination of traits: moderate size (males 28.4–30.8 mm snout vent length); presence of several flash orange-yellowish transversal stripes on thigh; vocal sac well developed; snout acuminate in profile; advertisement call with one note, 4–15 pulses, and dominant frequency 2.93–3.27 kHz. Description of the advertisement call and comments on natural history and habitat are provided.
Hyla dolloi was described by Werner (1903) based on two female specimens housed at the Institut Royal des Sciences Naturelles in Brussels, Belgium (IRSNB 6481). The locality of these syntypes was referred as Brasilien (leider nicht genauer bekannt), in free translation, Brazil (unfortunately nothing more precise is known). Since then, the type locality of the species was generically cited as in the original description (e.g., Nieden 1923; Harding 1983), as “Brasil” (e.g., Bokermann 1966; Duellman, 1977; Frost 1985), or “Brazil” (e.g., Lutz 1973). Moreover, besides treated as a “Doubtful species” by Lutz (1973), Hyla dolloi was considered a “name not associated with any known species” in a note by W.E. Duellman presented in Frost (1985). The combination Scinax dolloi (Werner, 1903) was established by Faivovich et al. (2005) and the species was included in the Scinax ruber clade, among the species not assigned to a species group, although considering that Scinax dolloi, S. hayii, and S. perereca form a morphologically similar group of species.
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