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.猎蝽亚科（Harpactorinae）共包含6个族，部分族类已通过系统发育研究得到归并整合。染色体研究对于阐明不同昆虫类群的分类学体系具有重要价值。针对猎蝽亚科的相关染色体研究目前仅覆盖部分亚类群，且多采用常规染色体分析技术，而关于该亚科内部演化关系的研究仍较为薄弱。为此，本研究对采集自巴西伊瓜苏国家公园（伊瓜苏市）的四刺丽猎蝽（Ricolla quadrispinosa）开展了细胞遗传学分析。观测到该物种的染色体二倍体数目为2n=27=24+X1X2Y。在减数分裂II中期，常染色体排列成环状，性染色体则在环中央形成假三价体。经C带染色结合荧光染料复染后，可在常染色体上观测到AT富集区段，且性染色体呈现负异固缩特征。本研究所得数据结合该类群其他物种的已有研究资料，表明不同类型的染色体重排参与了该类群的物种演化过程。此外，本文基于该类群已有的系统发育研究成果，提出了猎蝽亚科的核型演化假说。