A case of gynandromorphism in the Andrena (Chlorandrena) taraxaci species group (Hymenoptera: Anthophila: Andrenidae)

An individual with gynandromorphism exhibits both male and female phenotypic characteristics. Amongst bees (Hymenoptera: Anthophila), this phenomenon has already been reported in 6 families (Michez et al., 2009[[ref(ref2)]]). Gynandromorph bees are classified into different types depending on which body regions display male or female traits. Three primary categories of gynandromorphism are recognized: mosaic, bilateral, and transverse (Michez et al., 2009[[ref(ref2)]]; Pereira et al., 2010[[ref(ref3)]]). The wild bee genus *Andrena*, which contains more than 1,700 species globally (Bossert et al., 2024[[ref(ref1)]]), has already yielded several reported cases of gynandromorphism (Michez et al., 2009[[ref(ref2)]]; Ramos & Ruz, 2013[[ref(ref4)]]; Wcislo et al., 2004[[ref(ref7)]]; Xu & Cui, 2007[[ref(ref8)]]). Within the genus, gynandromorphs have been recorded in 10 subgenera. However, in many cases, such as *Chlorandrena*, records are limited to a single specimen (Michez et al., 2009[[ref(ref2)]]).