Genetic characterization of flat periwinkles (Littorinidae) from the Iberian Peninsula reveals interspecific hybridization and different degrees of differentiation

This study was funded by FEDER funds through the Operational Programme for Competitiveness Factors- COMPETE and by National Funds through FCT – Foundation for Science and Technology under the PTDC/BIA-EVF/113805/2009 and FCOMP-01-0124-FEDER-014272. RF is financed by FCT under the Programa Operacional Potencial Humano – Quadro de Referencia Estrategico Nacional from the European Social Fund and the Portuguese Ministerio da Educacao e Ciencia through the postdoctoral fellowship SFRH/BPD/89313/2012. JG is currently supported by a Xunta de Galicia postdoctoral fellowship (Modalidade B).