Invasive-species-monitoring
Guides
Agriotes pubescens
Pubescent Click Beetle
Agriotes pubescens is a Nearctic click beetle (family Elateridae) native to North America. It commonly co-occurs with Agriotes mancus on farmland in central Canada, where it is frequently collected in surveys targeting invasive Palearctic Agriotes species. Despite its abundance in agricultural settings, its life history and potential economic impact remain poorly studied. The species shares an identical sex pheromone—geranyl octanoate—with the invasive Palearctic species A. lineatus, resulting in cross-attraction between the two species in pheromone-baited traps.
Ctenocallis
Ctenocallis is a genus of aphids in the family Aphididae, subfamily Calaphidinae. At least one species, C. setosa, has been documented as adventive in Japan, representing the first Asian record for a genus otherwise native to Europe. The genus is characterized by species associated with leguminous host plants.
Hylastes opacus
crenulate bark beetle
Hylastes opacus is a bark beetle in the family Curculionidae, subfamily Scolytinae, native to the Palearctic region and recently introduced to North America. The species breeds in stumps and roots of dead or dying pines (Pinus) and occasionally other conifers. Adults use host volatiles as chemical cues to locate suitable breeding material, with documented attraction to nonanal, ethanol, and (-)-α-pinene. The species has been recorded in North American locations including Vermont and New York.
Stigmella sclerostylota
A pygmy moth in the family Nepticulidae, Stigmella sclerostylota is a leaf-mining species known from limited records in North America. The species was described in 1982 and has been documented in Arkansas and Ontario. As with other Stigmella species, the larvae feed internally on leaf tissue, creating distinctive mines.