Adalia decempunctata (Coleoptera: Coccinellidae), a Palaearctic species now established in North America

• Published in: The Canadian Entomologist
• Main Authors: Langor, David W., Abraham, Shawn, Hicks, Barry, James Hammond, H.E.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 2023
• Subjects: Insect Science; Molecular Biology; Physiology; Ecology, Evolution, Behavior and Systematics; Structural Biology; Canada; Newfoundland
• Online Access: http://dx.doi.org/10.4039/tce.2023.23; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X23000238

Abstract The Palaearctic ten-spotted lady beetle, Adalia decempunctata (Linnaeus), has been confirmed as established in North America, based on morphological characters and DNA barcodes. Its distribution currently appears limited to the Avalon Peninsula of the island of Newfoundland, Canada. Several characters, including the colour of the mesepimera, frons, labrum, antennal club, mouthparts, and legs, are reliable for discriminating among this species and the native, Holarctic two-spotted lady beetle, Adalia bipunctata (Linnaeus), in Newfoundland. An identification key to the two species is provided.