Dioxys productus

Dioxys productus can be distinguished from other Dioxys species by its elongated, somewhat cylindrical body form with a produced (extended) metasoma—consistent with the species epithet 'productus'. The genus Dioxys is characterized by a strongly modified female mandible with a cutting edge used to open host cells, and reduced scopa in females due to their cleptoparasitic lifestyle. Males have unmodified mandibles. Specific diagnostic features for D. productus relative to congeners require examination of morphological details including punctation patterns, pubescence density, and genitalia structure.

North America and Middle America. The species has been recorded as present in both regions based on distribution data from GBIF.

• Megachilidae - parasitoidDioxys species are cleptoparasites (nest parasites) of other megachilid bees. The female enters host nests and lays eggs in cells provisioned by the host. Dioxys larvae kill the host egg or larva and consume the stored provisions.

As a cleptoparasitic bee, Dioxys productus females actively search for host nests of other megachilid bees. Upon locating a suitable host nest, the female uses her modified mandibles to cut open the cell cap or wall, kills the host egg or young larva, and deposits her own egg in the cell. The developing D. productus larva then consumes the pollen and nectar provisions stored by the host female.

Dioxys productus functions as a cleptoparasite within bee communities, exerting population control on its host species. This parasitic relationship influences nest-site selection and defensive behaviors in host megachilid bees. The species contributes to the diversity of bee guilds in its habitat and represents an evolutionary adaptation to exploit the resource investment of solitary bees.

• Dioxys pacificusAnother North American species in the same genus; distinguished by differences in body proportions, punctation, and male genitalia structure.
• Dioxys rufipesPalaearctic congener with similar cleptoparasitic biology; distinguished by coloration of legs and differences in punctation patterns.
• CoelioxysRelated megachilid genus with similar cleptoparasitic lifestyle and elongated body form; distinguished by different mandible structure in females and details of abdominal morphology.

• solitary bee
• cleptoparasite
• nest parasite
• Megachilidae
• Dioxyini
• Hymenoptera
• North America
• Middle America

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• Catalogue of Life
• Eumastacidae | Beetles In The Bush