genetic analysis reveals candidate species in the scinax catharinae clade (amphibia: anura) from central brazil.scinax (anura: hylidae) is a species-rich genus of amphibians (113 spp.), divided into five species groups by morphological features. cladistic analyses however revealed only two monophyletic clades in these groups: scinax catharinae and scinax ruber. most species from the s. catharinae clade are found in atlantic rainforest, except for scinax canastrensis,s. centralis, s. luizotavioi, s. machadoi,s. pombali and s. skaios. in the present work, specimens of scinax collected in chapada dos guimarã ...201627007898
toxicity of formulated glyphosate (glyphos) and cosmo-flux to larval colombian frogs 1. laboratory acute toxicity.the spraying of coca (erythroxylum coca) with glyphosate in colombia has raised concerns about possible impacts on amphibians. there are few toxicity data for species other than those from temperate regions, and these have not been generated with the combination of formulated glyphosate (glyphos) and the adjuvant, cosmo-flux (coca mix) as used in coca control in colombia. in order to characterize toxicity of the spray mixture to frogs from colombia, gosner stage-25 tadpoles of scinax ruber, dend ...200919672764
toxicity of formulated glyphosate (glyphos) and cosmo-flux to larval and juvenile colombian frogs 2. field and laboratory microcosm acute toxicity.the spraying of coca (erythroxylum coca) with glyphosate (coca mixture, a combination of formulated glyphosate, glyphos, and an adjuvant, cosmo-flux) in colombia has raised concerns about possible impacts on amphibians. although acute lc50 for 8 species of colombian frogs ranged from 1.2 to 2.78 mg acid equivalents (a.e.)/l, these exposures were conducted in the laboratory in the absence of sediments and organic matter such as would occur under realistic field conditions. in order to assess the ...200919672765
revealing cryptic diversity using molecular phylogenetics and phylogeography in frogs of the scinax ruber and rhinella margaritifera species groups.few studies to date have examined genetic variability of widespread tropical amphibian species over their distributional range using different kinds of molecular markers. here, we use genetic data in an attempt to delimit evolutionary entities within two groups of neotropical frogs, the scinax ruber species group and the rhinella margaritifera species group. we combined mitochondrial and nuclear markers for a phylogenetic (a total of approximately 2500 bp) and phylogeographic study (approximatel ...200717303441
association of anurans with pathogenic a study of 450 amazonian anurans, we isolated yeasts and yeast-like fungi from 54 animals (bufo granulosus, b. marinus, dendrophrynyscus sp., hyla geographica, h. lanciformes, ololygon rubra, adenomera hylaedactyla, eleutherodactylus fenestratus, leptodactylus fuscus, l. ocellatus, l. pentadactylus). the internal organs of these animals did not show any macroscopic anomaly nor histopathology. we recovered 105 fungal isolates from the anuran liver, lung, kidney, spleen, heart and gonad. the is ...19854069190
acoustic niche partitioning in an anuran community from the municipality of floriano, piauí, brazil.vocalizations are an important trait for the identification of cryptic and/or closely related amphibian species. different vocalizations also contribute to partitioning of the acoustic space by sympatric species. this study aimed to describe the advertisement calls of anurans in a pond of the municipality of floriano, state of piauí, brazil, and infer the acoustic niche partitioning of amphibians. euclidean distance was used in a cluster analysis approach to infer the acoustic similarities among ...201930365635
cytogenetic studies in six species of scinax (anura, hylidae) clade scinax ruber from northern and northeastern brazil.scinax species are still underrepresented in cytogenetic studies, mainly with respect to populations from northeastern and northern brazil. in this study, we provide new chromosomal information on scinax boesemani, s. camposseabrai, s. garbei, s. pachycrus, s. trilineatus and s. x-signatus, all belonging to clade s. ruber. they were collected at two locations in the caatinga biome (northeastern brazil) and at one in the amazon (northern brazil) biomes. chromosomes were analyzed by conventional s ...201526273218
a new species of scinax wagler (anura: hylidae) from mato grosso, brazil.a new species of the scinax ruber clade is described from municipality of barra do garças, state of mato grosso, brazil. it is diagnosed by its size (svl 29.4-35.4 mm in males); dorsum with a background that varies from light and dark gray to dark brown, with round and irregular dark blotches; hidden surfaces of thigh and shank light or dark brown, with lighter, large and irregular blotches (yellow in life); and nuptial pad that covers the medial margin of metacarpal i, and obscures the posterio ...201627395498
comparative analysis based on replication banding reveals the mechanism responsible for the difference in the karyotype constitution of treefrogs ololygon and scinax (arboranae, hylidae, scinaxinae).according to the recent taxonomic and phylogenetic revision of the family hylidae, species of the former scinax catharinae (boulenger, 1888) clade were included in the resurrected genus ololygon fitzinger, 1843, while species of the scinax ruber (laurenti, 1768) clade were mostly included in the genus scinax wagler, 1830, and two were allocated to the newly created genus julianus duellman et al., 2016. although all the species of the former scinax genus shared a diploid number of 2n = 24 and the ...201728919964
a new species of rock-dwelling scinax wagler (anura: hylidae) from chapada dos veadeiros, central brazil.a new species of the scinax ruber clade is described from chapada dos veadeiros region, central brazil. the new species is diagnosed by having svl 21.9-27.7 mm in males and 26.7-31.7 mm in females; snout acuminate in dorsal view and rounded in profile; medium-sized tympanum; vocal sac single, median, subgular, that does not reach the pectoral region; iris iridescent yellow, with some thin, darker reticulations; tadpoles with ventral oral disc; p-3 regular and unmodified as a labial arm; absence ...201525662110
comparative description and ossification patterns of dendropsophus labialis (peters, 1863) and scinax ruber (laurenti, 1758) (anura: hylidae).although comparative studies of anuran ontogeny have provided new data on heterochrony in the life cycles of frogs, most of them have not included ossification sequences. using differential staining techniques, we observe and describe differences and similarities of cranial and postcranial development in two hylid species, scinax ruber (scinaxinae) and dendropsophus labialis (hylinae), providing new data of ontogenetic studies in these colombian species. we examined tadpoles raining from gosner ...201829892498
advertisement call of scinax camposseabrai (bokermann, 1968) (anura: hylidae), with comments on the call of three species of the scinax ruber clade.scinax camposseabrai was allocated into the scinax ruber clade by caramaschi & cardoso (2006) by overall similarities as snout not pointed, breeding in open areas, and an advertisement calls with multipulsed notes. this assumption about the call was based solely on an onomatopoeia provided by bokermann (1968). herein we provide a formal description of the advertisement call of s. camposseabrai and compare it with described calls of other s. ruber clade species. additionally, we provide descripti ...201627394262
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