title: A cytogenetical study on Economidichthys pygmaeus Holly, 1929 (Pisces, Gobiidae), an endemic freshwater goby from Western Greece.
abstract: A cytogenetic study was carried out on the chromosomes and the nuclear DNA content of the freshwater goby Economidichthys pygmaeus (Pisces, Gobiidae). The species is characterized by a 2n=46 karyotype consisting of 12 submetacentric and 11 subtelocentric chromosome pairs (NF=70). Major (45S) rDNA genes are terminal-centromeric located on the short arm of a single medium-small sized submetacentric pairas assessed by in situ hybridization, CMA3 staining, and Ag-NOR banding. The haploid (C-value) nuclear DNA content is 0.93±0.003 picograms. The cytogenetical data of Economidichthys pygmaeus were compared with those ones already available for other related gobies.
authors.affiliation: Centro de Biologia Ambiental, Faculdade de Ciências - Universidade de Lisboa - Portugal, Campo Grande - 1749-016 Lisboa - Portugal.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Rampin
authors.forename: Christos
authors.initials: C
authors.lastname: Gkenas
authors.forename: Stefano
authors.initials: S
authors.lastname: Malavasi
authors.forename: Angelo
authors.initials: A
authors.lastname: Libertini
keywords: Goby fish; fluorescent in situ hybridization; genome size; karyotype