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1.
Pap. avulsos zool ; 60: e20206053, Feb. 14, 2020. ilus, tab
Artigo em Inglês | VETINDEX | ID: biblio-1487270

Resumo

South American racers of the tribe Philodryadini are a widespread and diverse group of Neotropical snakes with a complex taxonomic and systematic history. Recent studies failed to present a robust phylogenetic hypothesis for the tribe, mainly due to incomplete taxon sampling. Here we provide the most extensive molecular phylogenetic analysis of Philodryadini available so far, including 20 species (83% of the known diversity) from which six were not sampled previously. Our results reveal that Philodryadini is not monophyletic, but instead includes a central Andean clade formed by Philodryas simonsii, P. tachymenoides, and P. amaru, and a southern and cis-Andean clade including all remaining philodryadines. This discovery requires resurrection of two genera as well as erection of a new tribe of Xenodontinae for the central Andean clade. Within the southern and cis-Andean radiation, our analyses resolve a basal dichotomy separating two main lineages: Clade A, containing the Common Green Racers P. laticeps and P. viridissima and the South American Vine snakes P. georgeboulengeri and P. argentea; and Clade B, including the remaining species of Philodryas sensu stricto. We resurrect the genera Chlorosoma and Xenoxybelis to better represent the monophyly of lineages within the southern and cis-Andean clade.


Assuntos
Animais , Classificação , Filogenia , Serpentes/anatomia & histologia , Serpentes/classificação , Serpentes/genética , América do Sul , Código de Barras de DNA Taxonômico
2.
Pap. avulsos zool ; 60Feb. 14, 2020.
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1487318

Resumo

Abstract South American racers of the tribe Philodryadini are a widespread and diverse group of Neotropical snakes with a complex taxonomic and systematic history. Recent studies failed to present a robust phylogenetic hypothesis for the tribe, mainly due to incomplete taxon sampling. Here we provide the most extensive molecular phylogenetic analysis of Philodryadini available so far, including 20 species (83% of the known diversity) from which six were not sampled previously. Our results reveal that Philodryadini is not monophyletic, but instead includes a central Andean clade formed by Philodryas simonsii, P. tachymenoides, and P. amaru, and a southern and cis-Andean clade including all remaining philodryadines. This discovery requires resurrection of two genera as well as erection of a new tribe of Xenodontinae for the central Andean clade. Within the southern and cis-Andean radiation, our analyses resolve a basal dichotomy separating two main lineages: Clade A, containing the Common Green Racers P. laticeps and P. viridissima and the South American Vine snakes P. georgeboulengeri and P. argentea; and Clade B, including the remaining species of Philodryas sensu stricto. We resurrect the genera Chlorosoma and Xenoxybelis to better represent the monophyly of lineages within the southern and cis-Andean clade.

3.
Pap. avulsos Zool. ; 60: e20206053, Oct. 20, 2020. ilus, tab
Artigo em Inglês | VETINDEX | ID: vti-33346

Resumo

South American racers of the tribe Philodryadini are a widespread and diverse group of Neotropical snakes with a complex taxonomic and systematic history. Recent studies failed to present a robust phylogenetic hypothesis for the tribe, mainly due to incomplete taxon sampling. Here we provide the most extensive molecular phylogenetic analysis of Philodryadini available so far, including 20 species (83% of the known diversity) from which six were not sampled previously. Our results reveal that Philodryadini is not monophyletic, but instead includes a central Andean clade formed by Philodryas simonsii, P. tachymenoides, and P. amaru, and a southern and cis-Andean clade including all remaining philodryadines. This discovery requires resurrection of two genera as well as erection of a new tribe of Xenodontinae for the central Andean clade. Within the southern and cis-Andean radiation, our analyses resolve a basal dichotomy separating two main lineages: Clade A, containing the Common Green Racers P. laticeps and P. viridissima and the South American Vine snakes P. georgeboulengeri and P. argentea; and Clade B, including the remaining species of Philodryas sensu stricto. We resurrect the genera Chlorosoma and Xenoxybelis to better represent the monophyly of lineages within the southern and cis-Andean clade.(AU)


Assuntos
Animais , Serpentes/anatomia & histologia , Serpentes/classificação , Serpentes/genética , Filogenia , Classificação , Código de Barras de DNA Taxonômico , América do Sul
4.
Zoologia (Curitiba, Impr.) ; 31(2): 114-118, Apr. 2014. tab, ilus
Artigo em Inglês | VETINDEX | ID: biblio-1504236

Resumo

Micrablepharus maximiliani (Reinhardt & Luetken, 1861) is a microteiid lizard widely distributed in the open areas of South America. Little is known about its ecology and reproductive biology. Here, we analyzed aspects of the natural history of a population of M. maximiliani from a Cerrado area in the state of Piauí, northeastern Brazil. Our results suggest that the reproductive activity of M. maximiliani might be seasonal in the Cerrado, since reproductive females were observed only in the dry season, whereas reproductive males were present in both seasons. Vitellogenic follicles and oviductal eggs were found simultaneously in one female, suggesting that females may produce more than one clutch per season. Sexual dimorphism was observed in body shape, and individuals were mainly restricted to a typical savanna physiognomy. The diet consisted of small arthropods, including spiders, crickets and cockroaches as the most important items.


Assuntos
Animais , Caracteres Sexuais , Comportamento Animal , Lagartos/fisiologia , Reprodução , Brasil , Pradaria
5.
Zoologia (Curitiba, Impr.) ; 31(2): 126-146, Apr. 2014. map, tab, ilus, graf
Artigo em Inglês | VETINDEX | ID: biblio-1504238

Resumo

The largest area of preserved Atlantic forest is located in the southern portion of Brazil. The region of Paranapiacaba is depicted in Brazilian zoological studies as one of the first and most intensely sampled areas of the state of São Paulo.We provide a concise list of reptiles and amphibians from the Paranapiacaba Municipal Park. It represents the first comprehensive survey of the group in the area. We recorded 136 species of reptiles and amphibians from field surveys, museum collections and the literature. The anuran diversity of Paranapiacaba is greater than that of Estação Ecológica de Boracéia, which has been considered the most distinctive areas in São Paulo in terms of amphibian diversity. The rich history of herpetological research in the region, including the occurrence of the two most threatened species in Brazil, converts the area to an important conservation landmark for the Brazilian herpetofauna.


Assuntos
Animais , Anfíbios/classificação , Anuros/classificação , Biodiversidade , Répteis/classificação , Brasil
6.
Zoologia (Curitiba) ; 31(2): 114-118, Apr. 2014. tab, ilus
Artigo em Inglês | VETINDEX | ID: vti-30859

Resumo

Micrablepharus maximiliani (Reinhardt & Luetken, 1861) is a microteiid lizard widely distributed in the open areas of South America. Little is known about its ecology and reproductive biology. Here, we analyzed aspects of the natural history of a population of M. maximiliani from a Cerrado area in the state of Piauí, northeastern Brazil. Our results suggest that the reproductive activity of M. maximiliani might be seasonal in the Cerrado, since reproductive females were observed only in the dry season, whereas reproductive males were present in both seasons. Vitellogenic follicles and oviductal eggs were found simultaneously in one female, suggesting that females may produce more than one clutch per season. Sexual dimorphism was observed in body shape, and individuals were mainly restricted to a typical savanna physiognomy. The diet consisted of small arthropods, including spiders, crickets and cockroaches as the most important items.(AU)


Assuntos
Animais , Lagartos/fisiologia , Comportamento Animal , Reprodução , Caracteres Sexuais , Brasil , Pradaria
7.
Zoologia (Curitiba) ; 31(2): 126-146, Apr. 2014. mapas, tab, ilus, graf
Artigo em Inglês | VETINDEX | ID: vti-30857

Resumo

The largest area of preserved Atlantic forest is located in the southern portion of Brazil. The region of Paranapiacaba is depicted in Brazilian zoological studies as one of the first and most intensely sampled areas of the state of São Paulo.We provide a concise list of reptiles and amphibians from the Paranapiacaba Municipal Park. It represents the first comprehensive survey of the group in the area. We recorded 136 species of reptiles and amphibians from field surveys, museum collections and the literature. The anuran diversity of Paranapiacaba is greater than that of Estação Ecológica de Boracéia, which has been considered the most distinctive areas in São Paulo in terms of amphibian diversity. The rich history of herpetological research in the region, including the occurrence of the two most threatened species in Brazil, converts the area to an important conservation landmark for the Brazilian herpetofauna.(AU)


Assuntos
Animais , Anfíbios/classificação , Répteis/classificação , Anuros/classificação , Biodiversidade , Brasil
8.
Pap. avulsos zool ; 53(16): 225-243, 2013.
Artigo em Inglês | VETINDEX | ID: biblio-1486768

Resumo

This work was carried out with the main objective of sampling the herpetofauna of a Cerrado site in the state of Piauí, Brazil, that is influenced by neighboring biomes and one of the least known regions of the domain. The herpetofauna of the different habitats present at Estação Ecológica de Uruçuí-Una (EEUU) was sampled intensively during three campaigns (two during the wet season and one during the dry season). We recorded 90 species, 64 reptiles and 26 anurans, a high local richness when compared to other well-sampled localities of the Cerrado. The rarefaction curve for both anurans and lizards shows that the observed richness is close to real and the richness estimators indicate that undetected species should be added with higher sampling effort. Analysis of co-occurrence shows that the species are not randomly distributed in the landscape, indicating that they use preferentially particular types of habitat. Despite being located in a transitional area and influenced by neighboring biomes, the cluster analysis of similarity suggests that the herpetofauna of the EEUU is typical of the Cerrado. Thereby, the results of this study indicate that the EEUU presents a rich herpetofauna that plays an important role in the conservation of a regional faunistic pool.


Assuntos
Animais , Anuros/classificação , Conservação dos Recursos Naturais , Fauna , Répteis/classificação
9.
Pap. avulsos Zool. ; 53(16): 225-243, 2013.
Artigo em Inglês | VETINDEX | ID: vti-11241

Resumo

This work was carried out with the main objective of sampling the herpetofauna of a Cerrado site in the state of Piauí, Brazil, that is influenced by neighboring biomes and one of the least known regions of the domain. The herpetofauna of the different habitats present at Estação Ecológica de Uruçuí-Una (EEUU) was sampled intensively during three campaigns (two during the wet season and one during the dry season). We recorded 90 species, 64 reptiles and 26 anurans, a high local richness when compared to other well-sampled localities of the Cerrado. The rarefaction curve for both anurans and lizards shows that the observed richness is close to real and the richness estimators indicate that undetected species should be added with higher sampling effort. Analysis of co-occurrence shows that the species are not randomly distributed in the landscape, indicating that they use preferentially particular types of habitat. Despite being located in a transitional area and influenced by neighboring biomes, the cluster analysis of similarity suggests that the herpetofauna of the EEUU is typical of the Cerrado. Thereby, the results of this study indicate that the EEUU presents a rich herpetofauna that plays an important role in the conservation of a regional faunistic pool.(AU)


Assuntos
Animais , Répteis/classificação , Anuros/classificação , Conservação dos Recursos Naturais , Fauna
10.
Pap. avulsos zool ; 52(12)2012.
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1486680

Resumo

We present the results of the first molecular analysis of the phylogenetic affinities of the Asian colubroid genus Sibynophis. We recovered a sister-group relationship between Sibynophis and the New World Scaphiodontophis. Although Liophidium sometimes is associated with these genera, the relationship is distant. Morphological characters that Liophidium shares with Sibynophis and Scaphiodontophis are resolved as homoplasies that probably reflect the similarities of their specialized feeding habits. The traditional subfamily Sibynophiinae is elevated to the family-level, and Scaphiodontophiinae is placed in its synonymy.


Os resultados apresentados correspondem à primeira análise molecular feita acerca das afinidades filogenéticas do gênero Sibynophis, um colubróideo de origem asiática. Sibynophis aparece como sendo o grupo-irmão do gênero Neotropical Scaphiodontophis. Embora Liophidium esteja por vezes associado a estes dois gêneros, a sua relação é apenas distante. Os caracteres morfológicos compartilhados entre Liophidium, Sibynophis e Scaphiodontophis correspondem a homoplasias que refletem provavelmente os hábitos alimentares especializados semelhantes, presentes nos três gêneros em questão. A tradicional subfamília Sibynophiinae é elevada ao nível de família, enquanto que Scaphiodontophiinae passa para sua sinonímia.

11.
Pap. avulsos Zool. ; 52(12)2012.
Artigo em Inglês | VETINDEX | ID: vti-442657

Resumo

We present the results of the first molecular analysis of the phylogenetic affinities of the Asian colubroid genus Sibynophis. We recovered a sister-group relationship between Sibynophis and the New World Scaphiodontophis. Although Liophidium sometimes is associated with these genera, the relationship is distant. Morphological characters that Liophidium shares with Sibynophis and Scaphiodontophis are resolved as homoplasies that probably reflect the similarities of their specialized feeding habits. The traditional subfamily Sibynophiinae is elevated to the family-level, and Scaphiodontophiinae is placed in its synonymy.


Os resultados apresentados correspondem à primeira análise molecular feita acerca das afinidades filogenéticas do gênero Sibynophis, um colubróideo de origem asiática. Sibynophis aparece como sendo o grupo-irmão do gênero Neotropical Scaphiodontophis. Embora Liophidium esteja por vezes associado a estes dois gêneros, a sua relação é apenas distante. Os caracteres morfológicos compartilhados entre Liophidium, Sibynophis e Scaphiodontophis correspondem a homoplasias que refletem provavelmente os hábitos alimentares especializados semelhantes, presentes nos três gêneros em questão. A tradicional subfamília Sibynophiinae é elevada ao nível de família, enquanto que Scaphiodontophiinae passa para sua sinonímia.

12.
Artigo em Inglês | VETINDEX | ID: vti-690163

Resumo

The present contribution explores the impact of the QUALIS metric system for academic evaluation implemented by CAPES (Coordination for the Development of Personnel in Higher Education) upon Brazilian Zoological research. The QUALIS system is based on the grouping and ranking of scientific journals according to their Impact Factor (IF). We examined two main points implied by this system, namely: 1) its reliability as a guideline for authors; 2) if Zoology possesses the same publication profile as Botany and Oceanography, three fields of knowledge grouped by CAPES under the subarea "BOZ" for purposes of evaluation. Additionally, we tested CAPES' recent suggestion that the area of Ecology would represent a fourth field of research compatible with the former three. Our results indicate that this system of classification is inappropriate as a guideline for publication improvement, with approximately one third of the journals changing their strata between years. We also demonstrate that the citation profile of Zoology is distinct from those of Botany and Oceanography. Finally, we show that Ecology shows an IF that is significantly different from those of Botany, Oceanography, and Zoology, and that grouping these fields together would be particularly detrimental to Zoology. We conclude that the use of only one parameter of analysis for the stratification of journals, i.e., the Impact Factor calculated for a comparatively small number of journals, fails to evaluate with accuracy the pattern of publication present in Zoology, Botany, and Oceanography. While such simplified procedure might appeals to our sense of objectivity, it dismisses any real attempt to evaluate with clarity the merit embedded in at least three very distinct aspects of scientific practice, namely: productivity, quality, and specificity.

13.
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1503864

Resumo

The present contribution explores the impact of the QUALIS metric system for academic evaluation implemented by CAPES (Coordination for the Development of Personnel in Higher Education) upon Brazilian Zoological research. The QUALIS system is based on the grouping and ranking of scientific journals according to their Impact Factor (IF). We examined two main points implied by this system, namely: 1) its reliability as a guideline for authors; 2) if Zoology possesses the same publication profile as Botany and Oceanography, three fields of knowledge grouped by CAPES under the subarea "BOZ" for purposes of evaluation. Additionally, we tested CAPES' recent suggestion that the area of Ecology would represent a fourth field of research compatible with the former three. Our results indicate that this system of classification is inappropriate as a guideline for publication improvement, with approximately one third of the journals changing their strata between years. We also demonstrate that the citation profile of Zoology is distinct from those of Botany and Oceanography. Finally, we show that Ecology shows an IF that is significantly different from those of Botany, Oceanography, and Zoology, and that grouping these fields together would be particularly detrimental to Zoology. We conclude that the use of only one parameter of analysis for the stratification of journals, i.e., the Impact Factor calculated for a comparatively small number of journals, fails to evaluate with accuracy the pattern of publication present in Zoology, Botany, and Oceanography. While such simplified procedure might appeals to our sense of objectivity, it dismisses any real attempt to evaluate with clarity the merit embedded in at least three very distinct aspects of scientific practice, namely: productivity, quality, and specificity.

14.
Pap. avulsos zool ; 50(21): 323-361, 2010. ilus
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1422203

Resumo

The present work describes a new species of Baurusuchidae from Upper Cretaceous sediments of the Bauru Basin, and provides the first complete postcranial description for the family. Many postcranial features observed in the new species are also present in other notosuchian taxa, and are thus considered plesiomorphic for the genus. These are: long cervical neural spines; robust deltopectoral crest of the humerus; large proximal portion in the radiale that contacts the ulna; ulnare anterior distal projection; supra-acetabular crest well developed laterally; post-acetabular process posterodorsally deflected; presence of an anteromedial crest in the femur; fourth trocanter of femur posteriorly positioned; tibia with a laterally curved shaft; calcaneum tuber posteroventrally oriented; osteoderms ornamented with grooves and imbricated in the tail. On the other hand, we found the following sacral and carpal features to be unique among all mesoeucrocodylians analyzed: transverse processes of sacral vertebrae dorsolaterally deflected; presence of a longitudinal crest in the lateral surface of sacral vertebrae; pisiform carpal with a condyle-like surface. The majority of these cited features corroborates a cursorial locomotion for the new species described in the present study, suggesting that members of the family Baurusuchidae were also cursorial species.


O presente trabalho descreve uma espécie nova de Baurusuchidae proveniente de sedimentos do Cretáceo Superior da Bacia Bauru, no Estado de São Paulo, fornecendo a primeira descrição de um esqueleto pós-craniano completo para a família. Muitas características pós-cranianas da nova espécie estão presentes em outros táxons de Notosuchia gondwânicos e são, desta forma, consideradas plesiomórficas para o gênero. Entre estas se destacam: espinhas neurais cervicais muito longas; três vértebras sacrais; crista deltopeitoral do úmero robusta; porção proximal do radiale com grande área de contato para a ulna; ulnare com projeção anterior distal; crista supra-acetabular bem desenvolvida lateralmente; processo pós-acetabular póstero-dorsalmente direcionado; presença de uma crista crânio-medial no fêmur; quarto trocânter do fêmur em uma posição posterior; diáfise da tíbia lateralmente curvada; tubérculo do calcâneo orientado póstero-ventralmente; osteodermas ornamentados com sulcos e imbricados na região caudal. Contudo, alguns caracteres são inéditos, sendo ausentes nas demais famílias de Crocodyliformes. Estes são: processos transversos das vértebras sacrais direcionados dorsolateralmente; presença de uma crista longitudinal na superfície lateral das vértebras sacrais; presença de uma superfície semelhante a um côndilo no carpal pisiforme. A maioria destas características corrobora um padrão de locomoção cursorial para a espécie descrita neste trabalho, e para a família Baurusuchidae.

15.
Pap. avulsos Zool. ; 50(21)2010.
Artigo em Inglês | VETINDEX | ID: vti-442586

Resumo

The present work describes a new species of Baurusuchidae from Upper Cretaceous sediments of the Bauru Basin, and provides the first complete postcranial description for the family. Many postcranial features observed in the new species are also present in other notosuchian taxa, and are thus considered plesiomorphic for the genus. These are: long cervical neural spines; robust deltopectoral crest of the humerus; large proximal portion in the radiale that contacts the ulna; ulnare anterior distal projection; supra-acetabular crest well developed laterally; post-acetabular process posterodorsally deflected; presence of an anteromedial crest in the femur; fourth trocanter of femur posteriorly positioned; tibia with a laterally curved shaft; calcaneum tuber posteroventrally oriented; osteoderms ornamented with grooves and imbricated in the tail. On the other hand, we found the following sacral and carpal features to be unique among all mesoeucrocodylians analyzed: transverse processes of sacral vertebrae dorsolaterally deflected; presence of a longitudinal crest in the lateral surface of sacral vertebrae; pisiform carpal with a condyle-like surface. The majority of these cited features corroborates a cursorial locomotion for the new species described in the present study, suggesting that members of the family Baurusuchidae were also cursorial species.


O presente trabalho descreve uma espécie nova de Baurusuchidae proveniente de sedimentos do Cretáceo Superior da Bacia Bauru, no Estado de São Paulo, fornecendo a primeira descrição de um esqueleto pós-craniano completo para a família. Muitas características pós-cranianas da nova espécie estão presentes em outros táxons de Notosuchia gondwânicos e são, desta forma, consideradas plesiomórficas para o gênero. Entre estas se destacam: espinhas neurais cervicais muito longas; três vértebras sacrais; crista deltopeitoral do úmero robusta; porção proximal do radiale com grande área de contato para a ulna; ulnare com projeção anterior distal; crista supra-acetabular bem desenvolvida lateralmente; processo pós-acetabular póstero-dorsalmente direcionado; presença de uma crista crânio-medial no fêmur; quarto trocânter do fêmur em uma posição posterior; diáfise da tíbia lateralmente curvada; tubérculo do calcâneo orientado póstero-ventralmente; osteodermas ornamentados com sulcos e imbricados na região caudal. Contudo, alguns caracteres são inéditos, sendo ausentes nas demais famílias de Crocodyliformes. Estes são: processos transversos das vértebras sacrais direcionados dorsolateralmente; presença de uma crista longitudinal na superfície lateral das vértebras sacrais; presença de uma superfície semelhante a um côndilo no carpal pisiforme. A maioria destas características corrobora um padrão de locomoção cursorial para a espécie descrita neste trabalho, e para a família Baurusuchidae.

16.
Artigo em Inglês | VETINDEX | ID: vti-441155

Resumo

The present contribution explores the impact of the QUALIS metric system for academic evaluation implemented by CAPES (Coordination for the Development of Personnel in Higher Education) upon Brazilian Zoological research. The QUALIS system is based on the grouping and ranking of scientific journals according to their Impact Factor (IF). We examined two main points implied by this system, namely: 1) its reliability as a guideline for authors; 2) if Zoology possesses the same publication profile as Botany and Oceanography, three fields of knowledge grouped by CAPES under the subarea "BOZ" for purposes of evaluation. Additionally, we tested CAPES' recent suggestion that the area of Ecology would represent a fourth field of research compatible with the former three. Our results indicate that this system of classification is inappropriate as a guideline for publication improvement, with approximately one third of the journals changing their strata between years. We also demonstrate that the citation profile of Zoology is distinct from those of Botany and Oceanography. Finally, we show that Ecology shows an IF that is significantly different from those of Botany, Oceanography, and Zoology, and that grouping these fields together would be particularly detrimental to Zoology. We conclude that the use of only one parameter of analysis for the stratification of journals, i.e., the Impact Factor calculated for a comparatively small number of journals, fails to evaluate with accuracy the pattern of publication present in Zoology, Botany, and Oceanography. While such simplified procedure might appeals to our sense of objectivity, it dismisses any real attempt to evaluate with clarity the merit embedded in at least three very distinct aspects of scientific practice, namely: productivity, quality, and specificity.

17.
Pap. avulsos zool ; 49(11)2009.
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1486432

Resumo

We present a molecular phylogenetic analysis of caenophidian (advanced) snakes using sequences from two mitochondrial genes (12S and 16S rRNA) and one nuclear (c-mos) gene (1681 total base pairs), and with 131 terminal taxa sampled from throughout all major caenophidian lineages but focussing on Neotropical xenodontines. Direct optimization parsimony analysis resulted in a well-resolved phylogenetic tree, which corroborates some clades identified in previous analyses and suggests new hypotheses for the composition and relationships of others. The major salient points of our analysis are: (1) placement of Acrochordus, Xenodermatids, and Pareatids as successive outgroups to all remaining caenophidians (including viperids, elapids, atractaspidids, and all other "colubrid" groups); (2) within the latter group, viperids and homalopsids are sucessive sister clades to all remaining snakes; (3) the following monophyletic clades within crown group caenophidians: Afro-Asian psammophiids (including Mimophis from Madagascar), Elapidae (including hydrophiines but excluding Homoroselaps), Pseudoxyrhophiinae, Colubrinae, Natricinae, Dipsadinae, and Xenodontinae. Homoroselaps is associated with atractaspidids. Our analysis suggests some taxonomic changes within xenodontines, including new taxonomy for Alsophis elegans, Liophis amarali, and further taxonomic changes within Xenodontini and the West Indian radiation of xenodontines. Based on our molecular analysis, we present a revised classification for caenophidians and provide morphological diagnoses for many of the included clades; we also highlight groups where much more work is needed. We name as new two higher taxonomic clades within Caenophidia, one new subfamily within Dipsadidae, and, within Xenodontinae five new tribes, six new genera and two resurrected genera. We synonymize Xenoxybelis and Pseudablabes with Philodryas; Erythrolamprus with Liophis; and Lystrophis and Waglerophis with Xenodon.


Este trabalho apresenta uma análise filogenética molecular das serpentes avançadas (Caenophidia), realizada com base na análise de seqüências de dois genes mitocondriais (rRNA 12S e 16S) e de um gene nuclear (c-mos; 1681 pares de bases no total) e com 131 táxons terminais, amostrados a partir das principais linhagens de Caenophidia, com ênfase nos xenodontíneos neotropicais. A análise de parcimônia dos dados mediante otimização direta resultou em uma árvore filogenética bem resolvida que, por um lado, corrobora alguns dos clados identificados em análises anteriores e por outro, estabelece novas hipóteses sobre a composição de outros grupos e do relacionamento entre eles. Os principais resultados obtidos salientam: (1) a alocação de Achrochordus, xenodermatídeos e pareatídeos como grupos externos sucessivos de todos os demais cenofídios (incluindo viperídeos, elapídeos, atractaspidídeos e todos os grupos de "colubrídeos"); (2) que, em relação ao último grupo, viperídeos e homalopsídeos podem ser considerados como clados irmãos dos demais; (3) a existência, dentro do grande grupo dos cenofidia, dos seguintes sub-grupos: psamophiídeos afro-asiáticos (incluindo o gênero Mimophis, de Madagascar), Elapidae (incluindo os hidrophiíneos, mas excluindo Homoroselaps, associado aos atractaspidídeos), Pseudoxyrhophiinae, Colubrinae, Natricinae, Dipsadinae e Xenodontinae. A análise sugere algumas alterações de cunho taxonômico dentro dos xenodontíneos, incluindo realocações genéricas para Alsophis elegans, Liophis amarali e modificações substanciais em relação a Xenodontini e à radiação dos xenodontíneos das Antilhas. Também é a aqui apresentada uma revisão da classificação de Caenophidia, baseada inicialmente nas análises moleculares, mas provendo diagnoses morfológicas para muitos dos clados incluídos, realçando os grupos que ainda merecem atenção especial no futuro. São aqui nomeados originalmente dois grandes clados dentro de Caenophidia, uma nova subfamília dentro de Dipsadidae e, dentro de Xenodontinae, cinco novas tribos e seis novos gêneros, sendo ainda dois gêneros revalidados. Os gêneros Xenoxybelis e Pseudablabes são considerados sinônimos de Philodryas; Erythrolamprus, sinônimo de Liophis; Lystrophis e Waglerophis, sinônimos de Xenodon.

18.
Pap. avulsos Zool. ; 49(11)2009.
Artigo em Inglês | VETINDEX | ID: vti-442532

Resumo

We present a molecular phylogenetic analysis of caenophidian (advanced) snakes using sequences from two mitochondrial genes (12S and 16S rRNA) and one nuclear (c-mos) gene (1681 total base pairs), and with 131 terminal taxa sampled from throughout all major caenophidian lineages but focussing on Neotropical xenodontines. Direct optimization parsimony analysis resulted in a well-resolved phylogenetic tree, which corroborates some clades identified in previous analyses and suggests new hypotheses for the composition and relationships of others. The major salient points of our analysis are: (1) placement of Acrochordus, Xenodermatids, and Pareatids as successive outgroups to all remaining caenophidians (including viperids, elapids, atractaspidids, and all other "colubrid" groups); (2) within the latter group, viperids and homalopsids are sucessive sister clades to all remaining snakes; (3) the following monophyletic clades within crown group caenophidians: Afro-Asian psammophiids (including Mimophis from Madagascar), Elapidae (including hydrophiines but excluding Homoroselaps), Pseudoxyrhophiinae, Colubrinae, Natricinae, Dipsadinae, and Xenodontinae. Homoroselaps is associated with atractaspidids. Our analysis suggests some taxonomic changes within xenodontines, including new taxonomy for Alsophis elegans, Liophis amarali, and further taxonomic changes within Xenodontini and the West Indian radiation of xenodontines. Based on our molecular analysis, we present a revised classification for caenophidians and provide morphological diagnoses for many of the included clades; we also highlight groups where much more work is needed. We name as new two higher taxonomic clades within Caenophidia, one new subfamily within Dipsadidae, and, within Xenodontinae five new tribes, six new genera and two resurrected genera. We synonymize Xenoxybelis and Pseudablabes with Philodryas; Erythrolamprus with Liophis; and Lystrophis and Waglerophis with Xenodon.


Este trabalho apresenta uma análise filogenética molecular das serpentes avançadas (Caenophidia), realizada com base na análise de seqüências de dois genes mitocondriais (rRNA 12S e 16S) e de um gene nuclear (c-mos; 1681 pares de bases no total) e com 131 táxons terminais, amostrados a partir das principais linhagens de Caenophidia, com ênfase nos xenodontíneos neotropicais. A análise de parcimônia dos dados mediante otimização direta resultou em uma árvore filogenética bem resolvida que, por um lado, corrobora alguns dos clados identificados em análises anteriores e por outro, estabelece novas hipóteses sobre a composição de outros grupos e do relacionamento entre eles. Os principais resultados obtidos salientam: (1) a alocação de Achrochordus, xenodermatídeos e pareatídeos como grupos externos sucessivos de todos os demais cenofídios (incluindo viperídeos, elapídeos, atractaspidídeos e todos os grupos de "colubrídeos"); (2) que, em relação ao último grupo, viperídeos e homalopsídeos podem ser considerados como clados irmãos dos demais; (3) a existência, dentro do grande grupo dos cenofidia, dos seguintes sub-grupos: psamophiídeos afro-asiáticos (incluindo o gênero Mimophis, de Madagascar), Elapidae (incluindo os hidrophiíneos, mas excluindo Homoroselaps, associado aos atractaspidídeos), Pseudoxyrhophiinae, Colubrinae, Natricinae, Dipsadinae e Xenodontinae. A análise sugere algumas alterações de cunho taxonômico dentro dos xenodontíneos, incluindo realocações genéricas para Alsophis elegans, Liophis amarali e modificações substanciais em relação a Xenodontini e à radiação dos xenodontíneos das Antilhas. Também é a aqui apresentada uma revisão da classificação de Caenophidia, baseada inicialmente nas análises moleculares, mas provendo diagnoses morfológicas para muitos dos clados incluídos, realçando os grupos que ainda merecem atenção especial no futuro. São aqui nomeados originalmente dois grandes clados dentro de Caenophidia, uma nova subfamília dentro de Dipsadidae e, dentro de Xenodontinae, cinco novas tribos e seis novos gêneros, sendo ainda dois gêneros revalidados. Os gêneros Xenoxybelis e Pseudablabes são considerados sinônimos de Philodryas; Erythrolamprus, sinônimo de Liophis; Lystrophis e Waglerophis, sinônimos de Xenodon.

19.
Pap. avulsos zool ; 47(7)2007.
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1486359

Resumo

The taxonomically (titanosaurid) identified eggs and eggshells of Auca Mahuevo (Patagonia, Argentina) provide an opportunity to compare and identify orphan megaloolithid eggs found elsewhere. Previous investigation determined that the oological material from Neuquén (Megaloolithus patagonicus) and Peru (M. pseudomamillare) are related to titanosaurid dinosaurs. Examination of an egg and several (megaloolithid) eggshell fragments from the Upper Cretaceous Marilia Formation strongly suggests, as oological characters are at least genus specific, that the same group of titanosaur dinosaurs, which lived in the Neuquén Basin during the Late Campanian, were also present and reproducing in the Cretaceous Bauru Basin (Brazil). Furthermore, it has been suggested that these titanosaurs, based on the site of Auca Mahuevo, demonstrated colonial nesting and nesting fidelity. These reproductive behaviors would advocate that similar nesting sites should exist in the Upper Cretaceous formations of the Bauru Basin and remain to be discovered, as the present Peiropolis locality represents a secondary deposit where fossils have been transported by high-energy fluvial system.


Os ovos e cascas de ovos provenientes de Auca Mahuevo (Patagonia, Argentina) e identificados taxonomicamente como sendo de titanossaurídeos servem de base para comparação e identificação de ovos megaloolithídeos encontrados em outras localidades. Investigações prévias detreminaram que os materialis oológicos encontrados em Neuquén (Megaloolithus patagonicus) e no Peru (M. pseudomamillare) estão na realidade relacionados à dinossauros titanossaurídeos. O estudo de um ovo e diversos fragmentos de cascas de ovos (megaloolithídeo) provenientes do Cretáceo Superior da Formação Marília sugere que o mesmo grupo taxonômico de dinossauros titanossauros que ocorria no Campaniano tardio da Bacia Neuquén também estava presente e se reproduzia durante o Cretáceo na Bacia Bauru, isto porque os caracteres oológicos estudados são reconhecíveis ao nível genérico. Além disso, foi sugerido que estes titanossauros do sítio de Auca Mahuevo apresentavam comportamento reprodutivo colonial e fidelidade ao sítio de desova. A presença deste tipo de comportamento reprodutivo apontaria para a existência de sítios de desova similares nas formações do Cretáceo Superior da Bacia Bauru, ainda a serem descobertos, já que a localidade de Peirópolis representa um depósito secundário onde os fósseis foram transportados através de um sistema fluvial de alta-energia.

20.
Artigo em Inglês | VETINDEX | ID: vti-442469

Resumo

The taxonomically (titanosaurid) identified eggs and eggshells of Auca Mahuevo (Patagonia, Argentina) provide an opportunity to compare and identify orphan megaloolithid eggs found elsewhere. Previous investigation determined that the oological material from Neuquén (Megaloolithus patagonicus) and Peru (M. pseudomamillare) are related to titanosaurid dinosaurs. Examination of an egg and several (megaloolithid) eggshell fragments from the Upper Cretaceous Marilia Formation strongly suggests, as oological characters are at least genus specific, that the same group of titanosaur dinosaurs, which lived in the Neuquén Basin during the Late Campanian, were also present and reproducing in the Cretaceous Bauru Basin (Brazil). Furthermore, it has been suggested that these titanosaurs, based on the site of Auca Mahuevo, demonstrated colonial nesting and nesting fidelity. These reproductive behaviors would advocate that similar nesting sites should exist in the Upper Cretaceous formations of the Bauru Basin and remain to be discovered, as the present Peiropolis locality represents a secondary deposit where fossils have been transported by high-energy fluvial system.


Os ovos e cascas de ovos provenientes de Auca Mahuevo (Patagonia, Argentina) e identificados taxonomicamente como sendo de titanossaurídeos servem de base para comparação e identificação de ovos megaloolithídeos encontrados em outras localidades. Investigações prévias detreminaram que os materialis oológicos encontrados em Neuquén (Megaloolithus patagonicus) e no Peru (M. pseudomamillare) estão na realidade relacionados à dinossauros titanossaurídeos. O estudo de um ovo e diversos fragmentos de cascas de ovos (megaloolithídeo) provenientes do Cretáceo Superior da Formação Marília sugere que o mesmo grupo taxonômico de dinossauros titanossauros que ocorria no Campaniano tardio da Bacia Neuquén também estava presente e se reproduzia durante o Cretáceo na Bacia Bauru, isto porque os caracteres oológicos estudados são reconhecíveis ao nível genérico. Além disso, foi sugerido que estes titanossauros do sítio de Auca Mahuevo apresentavam comportamento reprodutivo colonial e fidelidade ao sítio de desova. A presença deste tipo de comportamento reprodutivo apontaria para a existência de sítios de desova similares nas formações do Cretáceo Superior da Bacia Bauru, ainda a serem descobertos, já que a localidade de Peirópolis representa um depósito secundário onde os fósseis foram transportados através de um sistema fluvial de alta-energia.

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