According to Arntfield (1975), there are nine described species in North America, but a recent paper suggested that they are synonymous with the Palearctic G. maculata. The characters separating the putative Nearctic species are apparently rather variable. (B. Coulter, pers. comm.)
There are 11 records in the project database.
GA | AL | WA | FR | CL | MO | HO | BA | BC | HA | CE | PG | AA | CV | CH | SM | KE | QA | CN | TA | DO | WI | SO | WO |