Data from: Analysis of the karyotype structure in Ricolla quadrispinosa (Linneus, 1767): inferences about the chromosomal evolution of the tribes of Harpactorinae (Heteroptera: Reduviidae)

The Harpactorinae subfamily is composed of six tribes; phylogenetic studies bring together some of these tribes. Chromosome studies are of great importance for understanding the systematics of different groups of insects. For Harpactorinae, these studies are restricted to some subfamilies and conventional chromosome analysis, while the evolutionary relationships of the subfamily are scarce. Thus, this work analyzed cytogenetically Ricolla quadrispinosa species collected in Iguaçu National Park (Foz do Iguaçu – Brazil). Diploid number 2n=27=24+X1X2Y was observed. In metaphase II the autosomal chromosomes were organized in a ring with the sex chromosomes forming a pseudo-trivalent in the center of this ring. For C-banding followed by staining with fluorochromes, AT-rich blocks in autosomes were observed and the sex chromosomes were shown to be negatively heteropycnotic.The data obtained, together with existing data for other species of the group, indicated that different chromosomal rearrangements are involved in the evolution of the species. In addition, in this paper we present a proposal of karyotype evolution for the subfamily, based on existing phylogenetic studies for the group.