A first case of gynandromorphism in Ceratina moricei Friese, 1899 (Hymenoptera: Apidae)

Gynandromorphism is a condition in which an individual possesses both male and female body parts. There are three categories of gynandromorphs : bilateral if half the body is female and half the body is male according to the sagittal plane, transverse if one part of the body is female according to a transverse plane and the other part is male, and mosaic if sexual characteristics are randomly distributed on the body (Michez et al., 2009; Carion et al., 2025). Many gynandromorphs have been described among bees (Anthophila) in six families, including several cases from the family Apidae (Wcislo et al., 2004; Michez et al., 2009). Most gynandromorphs from the subfamily Xylocopinae are from the genus *Xylocopa* Latreille (i.e. 26 cases from 19 species: Villamizar, 2020; Almada et al., 2022; Brau & Michez, 2025). In contrast, only eight cases from four species have been described so far in the genus *Ceratina* Latreille (Villamizar, 2020). Villamizar (2020) suggests that this difference of data between the two genera is due to less conspicuous sexual dimorphism in the genus *Ceratina*. Therefore, an increased attention appears to be needed to detect and describe gynandromorphs in *Ceratina*: we present here a discrete case in *Ceratina* (*Euceratina*) *moricei* Friese, 1899.