title: Further evidence for the variability of the 18S rDNA loci in the family Tingidae (Hemiptera, Heteroptera).
abstract: As of now, within the lace bug family Tingidae (Cimicomorpha), only 1.5% of the species described have been cytogenetically studied. In this paper, male karyotypes ofStephanitis caucasica,Stephanitis pyri,Physatocheila confinis,Lasiacantha capucina,Dictyla rotundataandDictyla echiiwere studied using FISH mapping with an 18S rDNA marker. The results show variability: the major rDNA sites are predominantly located on a pair of autosomes but occasionally on the X and Y chromosomes. All currently available data on the distribution of the major rDNA in the Tingidae karyotypes are summarized and shortly discussed. Our main concern is to clarify whether the chromosomal position of rDNA loci can contribute to resolving the phylogenetic relationships among the Tingidae taxa.
authors.affiliation: Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St. Petersburg 199034, Russia.
authors.forename: Natalia V
authors.initials: NV
authors.lastname: Golub
authors.affiliation: Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006, Russia.
authors.forename: Viktor B
authors.initials: VB
authors.lastname: Golub
authors.affiliation: Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St. Petersburg 199034, Russia.
authors.forename: Valentina G
authors.initials: VG
authors.lastname: Kuznetsova
keywords: Cimicomorpha; FISH; Hemiptera; Karyotype; lace bugs; major rDNA cluster