“…In protacanthopterygians, multiple NORs appear in salmons, as in Salmo trutta [Caputo et al, 2009] and Salvelinus fontinalis [Fujiwara et al, 1998], the species that show the highest number of rDNA sites so far reported, as well as in 2 umbrid species (Esociformes) [Ráb et al, 2002]. On the other hand, multiple rDNA sites are more an exception than a rule within the acanthopterygian species studied so far, such as Aphanius fasciatus (Cyprinodontiformes) [Vitturi et al, 2005], Nerophis ophidion and Syngnathus abaster (Syngnathiformes) [Libertini et al, 2006], Monopterus albus and Synbranchus madeira (Synbranchiformes) [Ji et al, 2003;Carvalho et al, 2012]. In Perciformes, a highly conserved single-site pattern is noticeably altered only within the suborder Labroidei, especially in cichlid subfamilies Cichlasomatinae and Pseudocrenilabrinae [Gross et al, 2010;Poletto et al, 2010b], and sporadically in other taxa, as in 1 species of Labridae, Coris julis [Mandrioli et al, 2000a], in 1 species of Sparidae, Diplodis sargus [Merlo et al, 2013], and in 2 notothenioid species Ghigliotti et al, 2007].…”