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Preliminary approach to the phylogenetic relationsships of Polycladida (Platyhelmintha)

Autor Aguado, Mª Teresa; Grande, Cristina; Marquina, Daniel; Noreña, Carolina
Fecha de publicación sep-2013
EditorZoological Systematics and Evolution Research Group
Universidad de Barcelona
Societat Catalana de Biologia
Museo de Ciencias Naturales (Barcelona)
CSIC-UPF - Instituto de Biología Evolutiva (IBE)
Citación II Iberian Congress of Biological Systematicss (2013)
ResumenThe Polycladida is a group of marine flatworms with more than 900 species and a world wide distribution. This group was firstly described in 1881, and since then, there have been several conflicting classifications, some of them still coexist nowadays. These previous and current taxonomic disagreements have made difficult the understanding of evolutionary relationships, as well as the identification of geographical distributional patterns of many species. The order Polycladida was firstly divided in 1885 in two suborders Cotylea and Acotylea. Cotylea comprises four families, two of which are well represented, while the other two are monospecific and dubious. Within Acotylea there are three well represented superfamilies, but some genera and families are monospecific and their determination is based only on external characters. This study pursues a deep investigation into the relationships between the different groups. For this purpose we have analyzed morphological (internal and external) information, as well as molecular (genes 16S and COI) data. We provide a phylogenetic framework that facilitates the understanding of the evolution of morphological traits and provides a more stable hypothesis for the systematics.
Descripción Póster presentado en el II Iberian Congress of Biological Systematicss (Diversity is life), celebrado en Barcelona del 25 al 27 de septiembre de 2013.
URI http://hdl.handle.net/10261/100366
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