| occurrence of bufotenin in the osteocephalus genus (anura: hylidae). | bufotenin (5-hydroxy-n,n-dimetyltryptamine) is a tryptamine alkaloid widely spread among anuran families as a component of their chemical defense system, acting as a potent hallucinogenic factor, showing similar activity to lsd upon interaction with the 5ht2 human receptor. this work demonstrates the presence of bufotenin in the skin secretion of three arboreal amphibian species of the osteocephalus genus (osteocephalus taurinus, osteocephalus oophagus and osteocephalus langsdorffii) from the am ... | 2005 | 16054186 |
| systematics of the osteocephalusbuckleyi species complex (anura, hylidae) from ecuador and peru. | we present a new phylogeny, based on dna sequences of mitochondrial and nuclear genes, for frogs of the genus osteocephalus with emphasis in the osteocephalus buckleyi species complex. genetic, morphologic, and advertisement call data are combined to define species boundaries and describe new species. the phylogeny shows strong support for: (1) a basal position of osteocephalus taurinus + osteocephalus oophagus, (2) a clade containing phytotelmata breeding species, and (3) a clade that correspon ... | 2012 | 23166473 |
| a new species of kentropyxia baker, 1982 parasitic in the small intestine of osteocephalus taurinus steindachner (anura: hylidae) from the brazilian eastern amazon. | kentropyxia hylae n. sp. is described based on material from small intestine of osteocephalus taurinus steindachner from caxiuanã national forest, municipality of melgaço, state of pará, brazil. the new species is easily distinguished from the type-species and only species of the genus, kentropyxia sauria baker, 1982, by its smaller dimensions, the presence of cervical alae, spicules divided into three parts: a robust, single pointed outer processes ending with small finger-like projections and ... | 2015 | 26446547 |
| rediscovery of osteocephalus vilarsi (anura: hylidae): an overlooked but widespread amazonian spiny-backed treefrog. | osteocephalus vilarsi (melin, 1941) is an amazonian treefrog species known for over 75 years from its holotype only. due to a lack of published data on its morphological diagnostic characters and their variations, as well as the absence of molecular, acoustic and ecological data supporting its identity, a highly dynamic taxonomic history has led this species to be confused and even synonymised with other osteocephalus species from distinct species groups. the molecular phylogenetic relationships ... | 2019 | 31824771 |
| a new species of parapharyngodon chatterji, 1933 (oxyuroidea: pharyngodonidae), parasitic in osteocephalus taurinus (anura: hylidae) from brazil. | parapharyngodon politoedi n. sp. is described here, based on specimens found in the large intestines of osteocephalus taurinus from the caxiuanã national forest, state of pará, brazil. the new species is assigned to parapharyngodon based on the presence of non-embryonated eggs with sub-terminal opercula, when in the ovijector. parapharyngodon politoedi belongs to a group of species with three pairs of cloacal papillae and differs from its congeners by morphometric aspects, such as the length of ... | 2019 | 29455691 |