Nucleotide sequence comparisons were used to investigate ordinal and familial relationships within the class Amphibia. Approximately 850 base pairs of the mitochondrial 16S ribosomal RNA (rRNA) gene from representatives of 28 of the 40 families of extant amphibians were sequenced. Phylogenetic analyses of these data together with published data of the 12S rRNA gene for the same families and bot...

THE results of hypophysectomy and of injection of extracts show that the gonads of Amphibia are under the control of the anterior lobe of the pituitary (Wolfe, 1929; Hogben, 1930). Xenopus laevis does not exhibit any sexual activity in the laboratory. When appropriate nutritive and other conditions are fulfilled (Landgrebe, 1939), the ovaries are close to the threshold of ovulation at all seaso...

Anura (frogs and toads) constitute over 88% of living amphibian diversity but many important questions about their phylogeny and evolution remain unresolved. For this study, we developed an efficient method for sequencing anuran mitochondrial DNAs (mtDNAs) by amplifying the mitochondrial genome in 12 overlapping fragments using frog-specific universal primer sets. Based on this method, we gener...

Die wêreldwye indringerpadda, die gewone platanna Xenopus laevis (Anura: Pipidae), toon duidelike filogeografiese verskille tussen sy verskillende bevolkings in suidelike Afrika, natuurlike gebied. Dit het direk tot hoë genetiese variasie sommige van indringerbevolkings bygedra. Nietemin is daar nog geen sekerheid oor hoe stamme gebied met mekaar verband hou nie. Daarbenewens en geografi ese ve...

The diversity of frogs and toads in Universitas Gadjah Mada campus area has been studied by Prasintaningrum on the year 2018. 2018 study found five different species area. abundance east side is monitored this study. purpose to compare also distribution between 2020. This conducted using visual encounter survey time-constrained search as sampling technique. From monitoring result we concluded t...

Brachycephalus (Anura: Brachycephalidae) is a remarkable genus of miniaturized frogs of the Brazilian Atlantic Rainforest. Many of its species are highly endemic to cloud forests, being found only on one or a few mountaintops. Such level of microendemism might be caused by their climatic tolerance to a narrow set of environmental conditions found only in montane regions. This restriction severe...

Amphibian taxonomy is currently experiencing rapid changes, particularly within eleutherodactyline frogs, as a result of DNA Abstract A new species of the Eleutherodactylus lacrimosus assemblage (Anura, Brachycephalidae) from the lowland rainforest canopy of Yasuni National Park, Amazonian Ecuador. A new species of Eleutherodactylus from the lowland rainforest canopy in northeastern Amazonian E...