Scanning electron microscopy of cervical lobes of Apis drones
S Patinawinj; S Wongsiri
A comparison of the structure of the cervical lobes of the drone honey bee endophallus in 5 species of Apis, using scanning electron microscopy, provided evidence of reproductive isolation in the genus. Structural similarities suggest three evolutionary groups: (1) A. mellifera and A. cerana; (2) A. florea and A. andreniformis; (3) A. dorsata. A. dorsata is separate but closely related to group (1).