Taxonomic revision and filogenetic analisys of subfamily Crassostreinae (Mollusca: Bivalvia: Ostreoidea)

• Grant number: 12/00807-9
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2012
• End date: February 28, 2015
• Field of knowledge: Biological Sciences - Zoology - Morphology of Recent Groups
• Principal Investigator: Luiz Ricardo Lopes de Simone
• Grantee: Luiz Ricardo Lopes de Simone
• Host Institution: Museu de Zoologia (MZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The organization of the bivalves in general has always been very confusing and, in the case of ostreids, the intraspecific variation further complicates the identification of different species that occur in all oceans. Analysis morpho-anatomical, molecular and currently, are being widely used both to check their blood relations or to solve the problems of group identification. The Ostreidae in particular, have an aggravating factor, because of its phenotypic plasticity and wide distribution of species. Against this backdrop, this is part project that will carry out a taxonomic revision involving a detailed anatomical study of species of subfamily Crassostreinae. In addition, one objective is to formulate a phylogenetic hypothesis based on cladistic methodology for the species of the subfamily and relate it to other groups Ostreidae. For this analysis, data will be included morpho-anatomical and molecular. This study shows it is relevant to the front of Crassotreinae phenotypic plasticity and absence of a taxonomic revision to your main genre, Crassotrea. A detailed anatomical study with the Crassostrea species occurring in Brazil, has been accomplished during the Masters, and showed significant results for the separation of species. In addition, oa anatomical analysis of the species listed for the external group and some of the inner group, has already been made in previous studies. The relationship between Crassostreinae and other groups Ostreidae also becomes important, since there is no phylogenetic hypothesis published data involving morpho-anatomical and molecular level for this divergence. (AU)