| chromosomal evolution in the brazilian geckos of the genus gymnodactylus (squamata, phyllodactylidae) from the biomes of cerrado, caatinga and atlantic rain forest: evidence of robertsonian fusion events and supernumerary chromosomes. | chromosomes of the south american geckos gymnodactylus amarali and g. geckoides from open and dry areas of the cerrado and caatinga biomes in brazil, respectively, were studied for the first time, after conventional and agnor staining, cbg- and rbg-banding, and fish with telomeric sequences. comparative analyses between the karyotypes of open areas and the previously studied atlantic forest species g. darwinii were also performed. the chromosomal polymorphisms detected in populations of g. amara ... | 2009 | 20215729 |
| lizards on newly created islands independently and rapidly adapt in morphology and diet. | rapid adaptive changes can result from the drastic alterations humans impose on ecosystems. for example, flooding large areas for hydroelectric dams converts mountaintops into islands and leaves surviving populations in a new environment. we report differences in morphology and diet of the termite-eating geckogymnodactylus amaralibetween five such newly created islands and five nearby mainland sites located in the brazilian cerrado, a biodiversity hotspot. mean prey size and dietary prey-size br ... | 2017 | 28760959 |
| out of the deep: cryptic speciation in a neotropical gecko (squamata, phyllodactylidae) revealed by species delimitation methods. | levels of biodiversity in the neotropics are largely underestimated despite centuries of research interest in this region. this is particularly true for the cerrado, the largest neotropical savanna and a formally recognized biodiversity hotspot. molecular species delimitation methods have become essential tools to uncover cryptic species and can be notably robust when coupled with morphological information. we present the first evaluation of the monophyly and cryptic speciation of a widespread c ... | 2014 | 25109652 |
| on gymnodactylus amarali barbour, 1925, with the description of a new species (sauria, gekkonidae). | gymnodactylus amarali barbour, 1925, was previously considered to be a subspecies of g. geckoides, with a wide distribution in the brasilian cerrados. examination of a specimen from alto parnaíba, maranhão, near the type locality (engenheiro dodt, piauí), indicates that it is a proper species, apparently limited to the upper parnaíba basin. the form previously identified as g. geckoides amarali is described as a new species, g. carvalhoi, type locality ipueiras, state of tocantins, thus diagnose ... | 2005 | 16341438 |