title: An unusual ZZ/ZW sex chromosome system in Characidium fishes (Crenuchidae, Characiformes) with the presence of rDNA sites.
abstract: Characidium fishes with a sex chromosome system form a monophyletic group. This work presents data of Characidium lanei from the South Atlantic basin (Brazil), including an unknown type of ZW sex chromosome system for the groups including the presence of rDNA sites on sex chromosomes.
authors.affiliation: Universidade Federal do Paraná, Departamento de Genética, Centro Politécnico, Caixa Postal 19071, CEP 81531-990, Curitiba, PR, Brazil. rafanoleto@yahoo.com.br
authors.forename: R B
authors.initials: RB
authors.lastname: Noleto
authors.forename: A P
authors.initials: AP
authors.lastname: Amorim
authors.forename: M R
authors.initials: MR
authors.lastname: Vicari
authors.forename: R F
authors.initials: RF
authors.lastname: Artoni
authors.forename: M M
authors.initials: MM
authors.lastname: Cestari
mesh_terms: D000818:Animals; D001938:Brazil; D004275:DNA, Ribosomal / Q000235:genetics; D005260:Female; D005399:Fishes / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D012730:Sex Chromosomes / Q000235:genetics*
chemical_list: D004275:DNA, Ribosomal