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Analysis of the influence of ecological and evolutionary factors on morphological diversification of South American Xenodontinae snakes (Serpentes, Dipsadidae)

Grant number: 11/17070-6
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): December 01, 2011
Effective date (End): March 02, 2016
Field of knowledge:Biological Sciences - Zoology - Morphology of Recent Groups
Principal researcher:Eleonore Zulnara Freire Setz
Grantee:Julia Klaczko
Home Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


One of the central aims of evolutionary biology is to understand the causes of morphological diversification on evolutionary radiations. The diversification process occurs simultaneously in three dimensions: genealogical, phenotypic and ecological.The investigation of variation on each of these dimensions, added to the study of the associations between the three dimensions, helps in understanding how and which processes generate biological diversity. In order to study the nature of these interactions as well as the processes that generate the morphological patterns, we will study the subfamily Xenodontinae (Serpentes, Dipsadidae). The xenodontines snakes are from South American, including about 40 genera, phylogenetically defined. They have a broad morphological diversity and wide range of ecological attributes (change in habitat and food spectrum). These features make the xenodontine a great system to study the mechanisms that promote the diversification of lineages and the processes of convergence. We intend to analyze and describe the shape of skulls, using geometric morphometric techniques; determine the association between the morphological patterns described, the molecular phylogeny of the group and the different aspects of ecology, and finally test which evolutionary processes, drift or selection, are responsible for the observed patterns.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
KLACZKO, JULIA; SHERRATT, EMMA; SETZ, ELEONORE Z. F. Are Diet Preferences Associated to Skulls Shape Diversification in Xenodontine Snakes?. PLoS One, v. 11, n. 2 FEB 17 2016. Web of Science Citations: 12.
KLACZKO, JULIA; MONTINGELLI, GIOVANNA G.; ZAHER, HUSSAM. A combined morphological and molecular phylogeny of the genus ChironiusFitzinger, 1826 (Serpentes: Colubridae). Zoological Journal of the Linnean Society, v. 171, n. 3, p. 656-667, JUL 2014. Web of Science Citations: 7.
IVAN PEREZ, S.; KLACZKO, JULIA; DOS REIS, SERGIO F. Species tree estimation for a deep phylogenetic divergence in the New World monkeys (Primates: Platyrrhini). Molecular Phylogenetics and Evolution, v. 65, n. 2, p. 621-630, NOV 2012. Web of Science Citations: 20.

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