The classic East Asia–Eastern North America (EA‐ENA) disjunction, well‐documented in temperate plants, is typically attributed to the fragmentation of once‐continuous high‐latitude ranges by climatic cooling and regional extinction. Whether this model extends to insects, particularly aquatic groups, remains largely untested with genomic data. Here, we integrate whole‐genome sequencing, ddRAD‐seq and morphology with phylogeneti...

Urostylididae, a phytophagous heteropteran family that feeds on the sap of various trees and shrubs, comprises 8 genera and 173 species. Its phylogeny has received little attention, and no studies have revealed its generic monophyly or relationships. We present the first molecular phylogeny of Urostylididae based on complete mitogenomes and nuclear ribosomal genes from almost all genera and representative species, using maximu...

Aim Local environmental selection and lineage admixture have long been accepted as important adaptive mechanisms in adjusting widespread taxa to new environments. We studied a pond skater, Gerris latiabdominis , to explore the relative roles played by these two mechanisms in its process of adaptation to heterogeneous landscapes. Location East Asia. Taxon Gerris latiabdominis Miyamoto, 1958. Methods Mitochondrial (COI, COII) an...

Aim Palaeoclimatic and palaeogeological events have been identified as two main factors that influence the genetic structuring of extant organisms. We studied a montane stream‐dwelling insect, Metrocoris sichuanensis , to explore the relative roles played by these two factors in population genetic connectivity. Location Sichuan Basin, China. Methods Mitochondrial ( COI , COII , Cytb, 16S) and nuclear ( EF ‐1α, ITS 1) markers w...