We studied the ecology of Tropidurus itambere and T. oreadicus that occur syntopically in rocky habitats of Cerrado vegetation in central Brazil during the dry season (April to September 2000). The two species are ecologically similar, but somewhat differentiated in vertical microhabitat use. The two species preferred rocky surface microhabitat. Both species demonstrated a unimodal activity pattern, with a peak between 10 and 15 h. Their diets were similar in composition and prey size. The most frequent item used by both species was ants, whereas the most important preys volumetrically were termites and ants. Small morphological differences observed between the two Tropidurus species could explain minor microhabitat divergence: T. itambere is slightly smaller, heavier, and more robust, and uses lower perches. T. oreadicus is larger, lankier, with longer extremities (tail, fore- and hindlegs), and uses a larger vertical microhabitat range. These ecological differences are slight, when compared with those observed between sympatric species of Tropidurus in spatially more heterogeneous landscapes. Considering the slight ecomorphological divergence between the two Tropidurus species and their high abundance in outcrops, we suggest that interspecific territoriality is the mechanism of coexistence.

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Aspects of the ecology of Leptodactylus mystacinus and Leptodactylus fuscus were investigated in an area of the Cerrado of Central Brazil. The study included use of microhabitat, activity patterns, diet and, morphometry. Observations were conducted between April, 2006, and February, 2007. The species are sexually dimorphicfemales larger than males -and body size in L. mystacinus is larger than that of L. fuscus. Both species preferred the ground surface (microhabitat) of wetland habitats with herbaceous vegetation close to lentic water bodies. Leptodactylus mystacinus was observed most often in October and November (8:00-8:59 PM and 11:00-11:59 PM), and L. fuscus in November and October between 7:00 PM and 8:59 PM. The diet of both populations was based on Arthropoda, primarily Coleoptera, which was the most important order (IVI). Differences in the volumetric proportions of the categories of then preys used, and in the periods when they were most observed, are probably the factors that contribute the most to the coexistence of both species in the area. Intersexual differences in the diet were observed in both species. These differences were probably associated with the differential allocation of resources to the production of gametes or occasional differences in the use of space by the two sexes. A dieta destas populações foi baseada em Arthropoda, primariamente Coleoptera, a qual foi a mais importante ordem (IVI). Diferenças nas proporções volumétricas das categorias de presas utilizadas, e nos períodos em que são mais observadas, provavelmente sejam os fatores que mais contribuem para a coexistência das duas espécies na área. Diferenças intersexuais na dieta foram observadas para estas espécies. Estas diferenças estão provavelmente associadas à alocação diferencial de recursos para a produção de gametas ou diferenças ocasionais no uso do espaço pelos dois sexos. Palavras-chave: ecologia, dieta, Leptodactylus.

Ecological aspects and of the reproductive biology of Tropidurus oreadicus was investigated in a rocky cerrado area in Central Brazil. It was studied the morphometry, the microhabitat use, the activity pattern, the diet and the characteristics of the reproductive biology of T. oreadicus in Cocalzinho-GO, from April to September/2003. They are sexually dimorphic animals, with adult males larger than females. The preferential microhabitat used by the species was the surface of the rocks (saxicolous habit). The species shows a unimodal activity pattern. It was frequently observed resting and exposed to the sun between 9:00 and 10:59 hours. This T. oreadicus population feed upon ants, larvae of insects and beetles. Besides it presented ontogenetics shift and intersexual differences in the diet. Probably these differences were associated with the differentiated allocation of the resources for the growth or production of gamete. The reproduction is probably seasonal occurring mainly during the months of higher rainfall.Keywords Aspectos ecológicos e da biologia reprodutiva de Tropidurus oreadicus foram investigados em uma área de cerrado rupestre do Brasil Central. Foram estudados a morfometria, o uso do microhábitat, o padrão de atividade, a dieta e características da biologia reprodutiva de T. oreadicus em Cocalzinho -GO, de abril a setembro/2003. São animais sexualmente dimórficos, com os machos adultos maiores que as fêmeas. O microhábitat preferencial utilizado pela espécie foi a superfície das rochas (hábito saxícola). A espécie mostrou padrão de atividade unimodal. Foram frequentemente observados parados e expostos ao sol entre 9:00 e 10:59 horas. A alimentação desta população de T. oreadicus é baseada em formigas, larvas de inseto e besouros. Além disso, apresentaram mudanças ontogenéticas e diferenças intersexuais na dieta. Provavelmente essas diferenças estejam associadas à alocação diferenciada dos recursos para o crescimento ou produção dos gametas. A reprodução é provavelmente sazonal ocorrendo principalmente nos meses de maior pluviosidade.Palavras-chave: nicho, dieta, atividade, ecologia, Tropidurus.

We provide a list of amphibian and squamate species collected in the Raso da Catarina Ecological Station, Bahia state, Brazil, during two distinct periods. An initial visual inventory of amphibians was conducted monthly from March 2010 to February 2011, using transects in a forest and temporary ponds. The second inventory was conducted over a 30-day period between March and April, 2012, when 37 pitfall trap arrays, each consisting of four buckets and supplementary glue traps, were set in low scrub and forest, complemented by opportunistic searches. A total of 19 lizard species, two amphisbaenians, 21 frogs, and 11 snakes were recorded during the study. New records for the protected area include 10 lizards, one amphisbaenian, 15 amphibians, and 11 snakes (36 species in total). Several species typical of the Atlantic Forest were collected, reflecting the potential influence of this biome, especially in the sampled forest habitats (Mata da Pororoca).