Mitochondrial-introgression
Guides
Errastunus ocellaris
Errastunus ocellaris is a grass-feeding leafhopper in the tribe Paralimnini, widespread across the Palearctic region and present in North America with both native and adventive populations. In the Nearctic region, the species occurs as native populations in northwestern North America (Alaska, Yukon, Northwest Territories, British Columbia) and as adventive populations in eastern North America, where it has undergone documented range expansion from the Great Lakes region eastward since the 1960s. Molecular data confirm it as a distinct species from the native North American E. sobrinus, with which it shows evidence of mitochondrial introgression in some specimens.
Habronattus amicus
Habronattus amicus is a small jumping spider (family Salticidae) found in the western United States and parts of western Canada. It belongs to the species-rich genus Habronattus, which is particularly diverse in southwestern North America. The species has been the subject of phylogeographic research revealing complex evolutionary dynamics, including localized mitochondrial introgression with syntopic species such as H. ustulatus in dune systems of south-central Oregon. Like other members of its genus, it is a ground-dwelling, visually-oriented predator.