First-asian-record
Guides
Ctenocallis setosa
Ctenocallis setosa is a small aphid species native to Europe, adventive in North America, and recently detected in Japan (2017–2018, 2023–2024) as the first record for Asia. It is tightly associated with Cytisus scoparius (scotch broom), a naturalized invasive shrub. The species exhibits a monoecious holocyclic life cycle with sexual morphs produced in fall for overwintering eggs and no summer host alternation.