Gaius

(after Rix et al. 2018): Species of Gaius can be distinguished from all other Aganippini by the densely setose body and appendages (especially the lateral margins of the carapace and the ventral palpal tibia of males), by the presence in all but two species (i.e., G. austini and G. humphreysi) of a very strongly developed distal retrolateral tibial apophysis (dRTA), and by the presence in all but three species (i.e., G. aurora, G. austini and G. humphreysi) of a massive retrolateral tibial apophysis (RTA). Females of Gaius can be distinguished from most other Aganippini by their large size and highly setose body and appendages, and by the absence of sclerotized sigilla on the dorsal abdomen.