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  1. By: Sheffield, Cory - Heron, Jennifer M. - Williams, (Paul Hugh)
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 98
    Date: 2025-10-8
    Page Range: 861--870
    Publication Info: Washington, D.C International Society of Hymenopterists
    Subjects: Bombus caliginosus  Bombus vosnesenskii  Bumble bees  extirpated species  Nomenclature  North America  taxonomy