Revisão taxonômica das subespécies de Leptophis ahaetulla (Linnaeus, 1758) (serpentes, colubridae)

التفاصيل البيبلوغرافية
العنوان:	Revisão taxonômica das subespécies de Leptophis ahaetulla (Linnaeus, 1758) (serpentes, colubridae)
بيانات النشر:	Pontifícia Universidade Católica do Rio Grande do Sul Porto Alegre 2008
تفاصيل مُضافة:	Reis, Roberto Esser dos
نوع الوثيقة:	Electronic Resource
مستخلص:	The snake genus Leptophis comprises a group of semiarboreal, elongate, diurnal snakes with head distinct from neck distributed in Central and South America. Members of the genus Leptophis are distinguished by coloration pattern predominantly green or copper, with or without longitudinal stripes and narrow transversal bands. Among the taxa recognized in Leptophis, L. ahaetulla is the most wide-ranging and polymorphic species, with 12 recognized subspecies: L. a. ahaetulla, L. a. bocourti, L. a. bolivianus, L. a. coeruleodorsus. L. a. copei, L. a. liocercus, L. a. marginatus, L. a. nigromarginatus, L. a. occidentalis, L. a. ortoni, L. a. praestans and L. a. urostictus. As in other Leptophis, subspecies of L. ahaetulla are defined mainly by dorsal coloration. Despite the extensive revision previously published, a new taxonomic revision of L. ahaetulla, analyzing intra- and interpopulational variation among the characters used for the recognition of lhe subspecies, and including additional specimens and statistical methods not available to previous revision was necessary. The main purpose of the present study was to assess the validity of the subspecies of L. ahaetulla as well as provide variation on meristic characters, external and hemipenial morphology, coloration, distribution, and a dichotomous key to the taxa considered to be valid. The study of hemipenial and osteological morphology, geographic distribution and variation intra- and interpopulacional of the characters used for the recognition of the subspecies was employed before taxonomic decisions. This thesis is divided into four articles. In the first, “A new species of Leptophis (Serpentes, Colubridae) from Northeastern Brazil”, 42 of 271 specimens from northeastern Brazil could not be allocated te any of the known species of Leptophis, representing a previously unrecognized species named L. caatingensis. The coloration pattern, external and hemipenial morphology of new species were compared te parapatric tax O gênero Leptophis constitui um grupo de serpentes de hábitos semi-arborícolas, diurnas, com corpo delgado e longo e cabeça distinta do pescoço; distribuído na América Central e América do Sul. Serpentes deste gênero são diagnosticadas pelo padrão de coloração predominante verde ou cobre, com ou sem faixas longitudinais e bandas transversais estreitas. Dentre os táxons reconhecidos no gênero Leptophis, L. ahaetulla é o de distribuição geográfica mais ampla e o mais polimórfico, devido à extrema variação no padrão de coloração, morfologia externa e dentição, com 12 subespécies reconhecidas: L. a. ahaetulla, L. a. bocourti, L. a. bolivianus, L. a. coeruleodorsus, L. a. copei, L. a. liocercus, L. a. marginatus, L. a. nigromarginatus, L. a. occidentalis, L. a. ortoni, L. a. praestans e L. a. urostictus. Como os demais táxons do gênero, as subespécies de L. ahaetulla são diagnosticadas principalmente com base no padrão de coloração dorsal. Apesar da extensa revisão já realizada, fez-se necessária uma nova revisão sistemática de L. ahaetulla, enfocando-se aspectos da variação intra e interpopulacional dos caracteres utilizados para o reconhecimento das subespécies, e incluindo novos espécimes além de métodos estatísticos mais elaborados do que os disponíveis na última revisão. O presente estudo teve como objetivo avaliar a validade das subespécies de L. ahaetulla, assim como apresentar a variação nos caracteres referentes à morfologia externa e hemipeniana, coloração, distribuição, e uma chave de identificação para os táxons considerados válidos. Para o auxílio nas decisões taxonômicas, foi priorizado o estudo da morfologia hemipeniana e osteológica, da distribuição geográfica, e da variação intra e interpopulacional dos caracteres previamente utilizados para o reconhecimento das subespécies. Esta tese está dividida em quatro artigos. No primeiro, “A new species of Leptophis (Serpentes, Colubridae) from Northeastern Brazil”, foram analisados 271 espécimes coletados no nor
مصطلحات الفهرس:	ZOOLOGIA - TAXIONOMIA, SERPENTES, COLUBRÍDEOS, doctoralThesis
URL:	http://hdl.handle.net/10923/5364
الإتاحة:	Open access content. Open access content
ملاحظة:	Português
أرقام أخرى:	BRCRG oai:meriva.pucrs.br:10923/5364 1319710555
المصدر المساهم:	PONTIFICA UNIV CATOLICA RIO GRANDE SUL From OAIster®, provided by the OCLC Cooperative.
رقم الأكسشن:	edsoai.on1319710555
قاعدة البيانات:	OAIster

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