| skeletal development in the fossorial gymnophthalmids calyptommatus sinebrachiatus and nothobachia ablephara. | the development of the cartilaginous and bony elements that form the skull and axial and appendicular skeleton is described in detail for the post-ovipositional embryonic development of the fossorial gymnophthalmid species calyptommatus sinebrachiatus and nothobachia ablephara. both species have a snake-like morphology, showing an elongated body and reduced or absent limbs, as well as modifications in skull bones for burrowing, such as complex articulation surfaces and development of bony extens ... | 2012 | 22951271 |
| embryonic development of the fossorial gymnophthalmid lizards nothobachia ablephara and calyptommatus sinebrachiatus. | the evolutionary history of the lizard family gymnophthalmidae is characterized by several independent events of morphological modifications to a snake-like body plan, such as limb reduction, body elongation, loss of external ear openings, and modifications in skull bones, as adaptive responses to a burrowing and fossorial lifestyle. the origins of such morphological modifications from an ancestral lizard-like condition can be traced back to evolutionary changes in the developmental processes th ... | 2012 | 22951270 |
| comparative cranial osteology of fossorial lizards from the tribe gymnophthalmini (squamata, gymnophthalmidae). | squamates (lizards, snakes and amphisbaenians) are represented by a large number of species distributed among a wide variety of habitats. changes in body plan related to a fossorial habit are a frequent trend within the group and many morphological adaptations to this particular lifestyle evolved convergently in nonrelated species, reflecting adaptations to a similar habitat. the fossorial lifestyle requires an optimal morphological organization for an effective use of the available resources. s ... | 2010 | 20799328 |
| chromosomal polymorphisms due to supernumerary chromosomes and pericentric inversions in the eyelidless microteiid lizard nothobachia ablephara (squamata, gymnophthalmidae). | cytogenetic studies were performed on eight specimens of the monotypic microteiid lizard nothobachia ablephara, endemic of the sand dunes of the middle são francisco river, in the semiarid caatinga, state of bahia, brazil. chromosomes from fibroblast cultures were analysed after conventional, ag-nor staining, c-, and replication r- banding. a basic karyotype of 2n = 62, consisting mostly of subtelocentric and acrocentric chromosomes of decreasing size, was found in five specimens. diploid number ... | 1999 | 10461869 |
| helminth parasites of the lizard nothobachia ablephara (gymnophthalmidae) in caatinga areas from neotropical semiarid. | the lizard nothobachia ablephara is endemic to dune areas and sandy soils adjacent to the são francisco river in semiarid northeastern brazil. forty-nine lizard specimens were collected in 2 caatinga areas in the municipality of petrolina, in pernambuco state. three gastrointestinal helminth taxa were identified, the nematodes parapharyngodon alvarengai and physaloptera sp., and the cestode oochoristica sp. nothobachia ablephara showed low parasite richness, however higher levels of infection by ... | 2018 | 29301442 |
| genetic structure, phylogeny, and biogeography of brazilian eyelid-less lizards of genera calyptommatus and nothobachia (squamata, gymnophthalmidae) as inferred from mitochondrial dna sequences. | calyptommatus and nothobachia genera of gymnophthalmid lizards are restricted to sandy open habitats on são francisco river margins, northeastern brazil. phylogenetic relationships and geographic distribution of the four recognized species of calyptommatus were analyzed from partial mitochondrial cyt b, 12s, and 16s rrna genes sequencing, taking allopatric populations of the monotypic nothobachia ablephara as the outgroup. in calyptommatus a basal split separated c. sinebrachiatus, a species res ... | 2010 | 20434569 |