Fauna reptiliana do norte da grande Porto Alegre, Rio Grande do Sul, Brasil

Lema, Thales de; Vieira, Marisa Ibarra; Araújo, Moema Leitão de

doi:10.1590/s0101-81751983000400002

Cited by 32 publications

(40 citation statements)

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“…A maioria das espécies registradas (n= 18; 51,4%) são comumente encontradas em áreas campestres do Rio Grande do Sul, seguidas por aquelas que podem ocupar desde áreas florestadas até campos (n = 15; 42,9%), Tabela I (sensu Lema et al, 1984e Lema, 1994. Apenas duas espécies possuem distribuição restrita a áreas florestadas, Tabela I. Aproximadamente 26% das espécies (n = 9) são reconhecidamente associadas a hábitats alterados do Estado, como áreas peridomiciliares e lavouras, Tabela I (sensu Lema et al, 1984e Lema, 1994.…”

Section: Resultsunclassified

“…Apenas duas espécies possuem distribuição restrita a áreas florestadas, Tabela I. Aproximadamente 26% das espécies (n = 9) são reconhecidamente associadas a hábitats alterados do Estado, como áreas peridomiciliares e lavouras, Tabela I (sensu Lema et al, 1984e Lema, 1994. Hemidactylus mabouia não foi considerada nestas relações por se tratar de espécie exótica (Lema, 1994).…”

Section: Resultsunclassified

“…A similaridade faunística da área de estudo foi comparada com outras três áreas estudadas no Rio Grande do Sul (Gomes & Krause, 1982;Lema et al,1980Lema et al, , 1984, utilizando o Coeficiente de Similaridade Binário de Sorensen (Krebs, 1999):…”

Section: Methodsunclassified

“…Lema & Fabián-Beurmann, 1977;Lema et al, 1980;Gomes & Krause, 1982;Lema et al, 1984;Cechin, 2002). Lema & Ferreira (1990) publicaram uma lista sistemática comentada dos testudines do Rio Grande do Sul e afirmaram que a fauna conhecida de quelônios é pobre em número de espécies, mas apresenta ainda problemas pela escassez de material de coleções e de especialistas.…”

Section: Introductionunclassified

“…Gomes & Krause, 1982;Martins & Oliveira, 1999;Marques & Sazima, 2004), existindo poucos dados sobre áreas sob intensa ação antrópica (Lema et al, 1980;1984). O presente estudo visou realizar o inventário de répteis em área alterada no campus da Universidade Federal de Santa Maria e comparar a fauna nos diferentes ambientes amostrados.…”

Section: Introductionunclassified

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Répteis do campus da Universidade Federal de Santa Maria, RS, Brasil

et al. 2005

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This work presents an inventory of reptile species occuring in the campus of Universidade Federal de Santa Maria (UFSM) and surroundings. It is based on monthly field expeditions between November 2001 and October 2002 and examination of material in the Coleção Herpetológica do Departamento de Biologia da UFSM. Of the 36 species listed, 20 were recorded in the field whereas 16 were recorded in the collection.

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Section: Resultsunclassified

Section: Methodsunclassified

Section: Introductionunclassified

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Répteis do campus da Universidade Federal de Santa Maria, RS, Brasil

et al. 2005

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Dissecting the major American snake radiation: A molecular phylogeny of the Dipsadidae Bonaparte (Serpentes, Caenophidia)

Vidal

Dewynter²,

Gower

2010

Comptes Rendus. Biologies

102

118

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The Dipsadidae contains more than 700 extant species belonging to 92 genera and is the largest family of American snakes. In this work, we built a data set including two mitochondrial genes (12S and 16S rRNA) for 125 dipsadid taxa belonging to 59 genera, in order to gain further insights on the phylogenetic relationships of this large group at the subfamilial and generic levels. Among dipsadines, the monotypic genus Nothopsis is the sister-group to Leptodeira. Among xenodontines, the monophyly of seven previously recognized tribes (Alsophiini, Elapomorphini, Hydropsini, Philodryadini, Pseudoboini, Tachymenini and Xenodontini) is confirmed. Among Xenodontini, the genus Liophis is paraphyletic with respect to Erythrolamprus and Umbrivaga and workers should be aware of the inadequacy of the current taxonomy. Finally, the following genera could not confidently be allocated to the above tribes: Caaeteboia, Echinantera and Taeniophallus, Tropidodryas, Manolepis and Pseudalsophis, Xenopholis, Psomophis, Hydrodynastes, Conophis and Crisantophis.

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Simultaneous Expression of UV and Violet SWS1 Opsins Expands the Visual Palette in a Group of Freshwater Snakes

Hauzman

Pierotti

Bhattacharyya

et al. 2021

Molecular Biology and Evolution

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Snakes are known to express a rod visual opsin and two cone opsins, only (SWS1, LWS), a reduced palette resulting from their supposedly fossorial origins. Dipsadid snakes in the genus Helicops are highly visual predators that successfully invaded freshwater habitats from ancestral terrestrial-only habitats. Here we report the first case of multiple SWS1 visual pigments in a vertebrate, simultaneously expressed in different photoreceptors and conferring both UV and violet sensitivity to Helicops snakes. Molecular analysis and in vitro expression confirmed the presence of two functional SWS1 opsins, likely the result of recent gene duplication. Evolutionary analyses indicate that each sws1 variant has undergone different evolutionary paths, with strong purifying selection acting on the UV-sensitive copy and dN/dS ∼1 on the violet-sensitive copy. Site-directed mutagenesis points to the functional role of a single amino acid substitution, Phe86Val, in the large spectral shift between UV and violet opsins. In addition, higher densities of photoreceptors and SWS1 cones in the ventral retina suggest improved acuity in the upper visual field possibly correlated with visually-guided behaviors. The expanded visual opsin repertoire and specialized retinal architecture are likely to improve photon uptake in underwater and terrestrial environments, and provide the neural substrate for a gain in chromatic discrimination, potentially conferring unique color vision in the UV-violet range. Our findings highlight the innovative solutions undertaken by a highly specialized lineage to tackle the challenges imposed by the invasion of novel photic environments and the extraordinary diversity of evolutionary trajectories taken by visual opsin-based perception in vertebrates.

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Fauna reptiliana do norte da grande Porto Alegre, Rio Grande do Sul, Brasil

Cited by 32 publications

References 4 publications

Répteis do campus da Universidade Federal de Santa Maria, RS, Brasil

Répteis do campus da Universidade Federal de Santa Maria, RS, Brasil

Dissecting the major American snake radiation: A molecular phylogeny of the Dipsadidae Bonaparte (Serpentes, Caenophidia)

Simultaneous Expression of UV and Violet SWS1 Opsins Expands the Visual Palette in a Group of Freshwater Snakes

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