Single Origin of Sex Chromosomes and Multiple Origins of B Chromosomes in Fish Genus Characidium. - Pansonato-Alves, José Carlos; Serrano, Érica Alves; Utsunomia, Ricardo; Camacho, Juan Pedro M.; Costa Silva, Guilherme José da; Vicari, Marcelo Ricardo; Artoni, Roberto Ferreira; Oliveira, Cláudio; Foresti, Fausto (PLoS ONE, 2014)