Relações evolutivas entre ecologia e morfologia serpentiforme em espécies de lagartos microteiídeos (Sauria: Gymnophthalmidae)

Grizante, Mariana B.

doi:10.11606/d.59.2009.tde-23042010-160905

Cited by 5 publications

(8 citation statements)

References 25 publications

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“…These authors highlight the importance of these ombrophile areas to the relictual fauna. The same species was also recorded in the Agrest (Vanzolini 1974) and Cariri microregion (Grizante 2009) in environmental with the same characteristics, corroborating with this study.…”

Section: Discussionsupporting

confidence: 89%

“…These data corroborate those of Freire (1996) and Delfim & Freire (2007), where A. vanzolinia is characterized by a substrate with these characteristics, in contrast to other species of the same family, which were found on different substrates, such as Vanzosaura rubricauda (Boulenger, 1902), which inhabited sandy or clayey soil. The morphology is primarily correlated with its fossorial habit and consequently with the type of microhabitat that the species chooses to utilize, suggesting they use more of the physical properties among substrates (Grizante 2009). The evolution of the morphology and limb reduction has been suggested to be adaptive for fossorial locomotion by subterranean crawl or locomotion by ripples in environments with leaf litter (Grizante 2009, Roscito 2010, Barros et al 2011.…”

Section: Discussionmentioning

confidence: 99%

“…The morphology is primarily correlated with its fossorial habit and consequently with the type of microhabitat that the species chooses to utilize, suggesting they use more of the physical properties among substrates (Grizante 2009). The evolution of the morphology and limb reduction has been suggested to be adaptive for fossorial locomotion by subterranean crawl or locomotion by ripples in environments with leaf litter (Grizante 2009, Roscito 2010, Barros et al 2011.…”

Section: Discussionmentioning

confidence: 99%

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Microhabitat use and diet of Anotosaura vanzolinia(Squamata: Gymnophthalmidae) in a Caatinga area, Brazil

Oliveira

Pessanha

2013

Biota Neotrop.

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Abstract:This study aimed to analyze the microhabitat use and diet of the lizard Gymnophthalmidae Anotosaura vanzolinia (Dixon 1974) in the Complexo Aluízio Campos (7° 16' 34" S, 35° 53' 7" W), an area of the Caatinga in the Campina Grande, Paraíba. We studied a total of 12 transects by active searching during the daytime. In each sample, habitat and microhabitat types occupied by the specimen were categorized, together with solar incidence and soil type. For all individuals, morphometric measurements were performed, as well as dissection for stomach content analysis. We collected a total of 46 individuals, with a snout-vent length ranging between 19 and 45 mm, collected over all habitats, with prevalence in soil and earthy litter microhabitats near rocky outcrops.The dietary analysis showed a use of items of soil fauna and identified 14 types of prey, mainly insects such as termites and ants. It was observed that smaller individuals (SVL < 30 mm) fed mainly on Hymenoptera (Family Formicidae), whereas larger individuals (SVL > 30 mm) selected Isoptera. Resumo: O presente trabalho objetivou analisar o uso do microhabitat e a dieta do lagarto Gymnophthalmidae Anotosaura vanzolinia (Dixon 1974) no Complexo Aluízio Campos (7° 16' 34" S, 35° 53' 7" W), uma área de Caatinga do município de Campina Grande, Paraíba. Foram estudados ao todo 12 transectos utilizando a metodologia de busca ativa diurna. Em cada expedição foram categorizados os tipos de habitat e microhabitat ocupado pelo espécime, além de dados de incidência solar e tipagem do solo. Para os indivíduos coletados, foram tomadas medidas morfométricas além da dissecação para análise do conteúdo estomacal. Foi coletado um total de 46 indivíduos, com um comprimento rostro-cloacal variando entre 19 e 45 mm, coletados ao longo de todos os habitats, com prevalência nos microhabitats com serrapilheira e solo terroso próximo a afloramentos rochosos. A análise da dieta evidenciou uma utilização de itens da fauna edáfica, sendo identificados 14 tipos de presas, principalmente insetos como cupins e formigas. Foi observado que indivíduos menores (CRC < 30 mm) alimentam-se principalmente de Hymenoptera (Família Formicidae) enquanto os indivíduos maiores (CRC > 30 mm) selecionaram Isoptera. Palavras-chave: lagartos fossoriais, ecologia alimentar, lagartos gimnoftalmídeos, forrageio. Biota Neotrop., vol. 13, no. 3 For the study, 12 quadrants of 100 m 2 were selected, which covered different types of vegetation and habitats. The lizards were caught during the dry season (March-April 2011) and the rainy season (July-August 2011) by an active diurnal search method (from 8.00 a.m. to 5.00 p.m.). At each site, rocks, timber, or other surface debris that might serve as lizard refuge sites, were lifted/rolled-over, in addition to making shallow excavations in the soil. To record the type of habitat and microhabitat where the specimens were found, we used the classification proposed by Delfim & Freire (2007). The habitats included: sparse shrubby vegetation, dense shrubby vege...

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Microhabitat use and diet of Anotosaura vanzolinia(Squamata: Gymnophthalmidae) in a Caatinga area, Brazil

Oliveira

Pessanha

2013

Biota Neotrop.

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“…4 E,F). Colobodactylus' dI of the forelimb is clearly reduced; this is in disagreement with Kizirian and McDiarmid (1998) and Grizante (2009), who report only the presence of mcI. However, it is possible that there is intrapopulational variation for this character; the presence of a vestigial ossification distal to mc1 in C. taunay (MTR 746) and the apparent absence of such element in the second individual (MZUSP 94254) argue in favor of this variation ( Fig.…”

Section: Digit Arrangement In Gymnophthalmid Lizardsmentioning

confidence: 78%

“…dc, distal carpal; mc, metacarpal. Grizante (2009) Colobodactylus taunayi (5) 0/1:3:4:5:3 (5) 2:3:4:5:4 dI of the forelimb from one of the specimens examined (MTR 00746) shows a single phalanx following mcI in both forelimbs (Fig. 3B).…”

Section: Summary Of the Phalangeal Formulas For Gymnophthalmidae Speciesmentioning

confidence: 99%

Digit evolution in gymnophthalmid lizards

Roscito

Nunes²,

Rodrigues³

2014

Int. J. Dev. Biol.

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The tetrapod limb is a highly diverse structure, and reduction or loss of this structure accounts for many of the limb phenotypes observed within species. Squamate reptiles are one of the many tetrapod lineages in which the limbs have been greatly modified from the pentadactyl generalized pattern, including different degrees of reduction in the number of limb elements to complete limblessness. Even though limb reduction is widespread, the evolutionary and developmental mechanisms involved in the formation of reduced limb morphologies remains unclear. In this study, we present an overview of limb morphology within the microteiid lizard group Gymnophthalmidae, focusing on digit arrangement. We show that there are two major groups of limbreduced gymnophthalmids. The first group is formed by lizard-like (and frequently pentadactyl) species, in which minor reductions (such as the loss of 1-2 phalanges mainly in digits I and V) are the rule; these morphologies generally correspond to those seen in other squamates. The second group is formed by species showing more drastic losses, which can include the absence of an externally distinct limb in adults. We also present the expression patterns of Sonic Hedgehog (Shh) in the greatly reduced fore and hindlimb of a serpentiform gymnophthalmid. Our discussion focuses on identifying shared patterns of limb reduction among tetrapods, and explaining these patterns and the morphological variation within the gymnophthalmids based on current knowledge of the molecular signaling pathways that coordinate limb development.

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A comparative analysis of the post‐cranial skeleton of fossorial and non‐fossorial gymnophthalmid lizards

Roscito¹,

Rodrigues²

2013

Journal of Morphology

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Squamates are found in a wide range of habitats and show a corresponding diversity of morphologies that can often be correlated with locomotor mode. The evolution of a snake-like body form, frequently associated with fossoriality, from a typical lacertiform morphology involves changes in the morphology of vertebrae, girdles, and limbs; the changes are mainly manifested by the reduction or loss of limbs and body elongation. In this study, we describe the axial and appendicular skeletons of six closely related gymnophthalmid species. Three of them show a lizard-like morphology, with a four-digit forelimb and a five-digit hindlimb, and the other three show a snake-like morphology associated with a burrowing habit, with reduced limbs and a longer body in comparison to the former three species. We show that vertebral morphology is similar among the six species, with the differences being accounted for by an increase in the number of vertebrae and by the structural reduction of girdles and limbs in the snake-like species. Skeletal morphology provides valuable information on locomotion type, physiology, diet, and other biological features. The burrowing morphology usually involves accentuated reduction of girdle and limb elements, reflecting an undulating type of locomotion in which the limbs play little or no role in propelling the body; in contrast, well-developed limbs and girdles indicate a greater reliance on the limbs for body propulsion. Limb reduction is frequent among vertebrates, but many different phenotypes are found in species exhibiting some kind of reduction, indicating that different mechanisms and evolutionary pressures may be involved in generating the diverse morphologies.

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Relações evolutivas entre ecologia e morfologia serpentiforme em espécies de lagartos microteiídeos (Sauria: Gymnophthalmidae)

Cited by 5 publications

References 25 publications

Microhabitat use and diet of Anotosaura vanzolinia(Squamata: Gymnophthalmidae) in a Caatinga area, Brazil

Microhabitat use and diet of Anotosaura vanzolinia(Squamata: Gymnophthalmidae) in a Caatinga area, Brazil

Digit evolution in gymnophthalmid lizards

A comparative analysis of the post‐cranial skeleton of fossorial and non‐fossorial gymnophthalmid lizards

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