The sellmani species group may be characterized by the following combination of characters: spermatheca with pitcher-shaped capsule bearing broad invagination, and clubshaped stem ( Figs 45, 54, 63, 72, 80, 88, 96); median lobe of aedeagus with short tubus, narrowly or broadly triangular in lateral view ( Figs 39, 48, 57, 66, 75, 83, 91).
Species included: G. brevicornis Casey, G. ashei Klimaszewski, sp. nov., G. brincki Palm, G. atrolucens Casey, G. dentata Klimaszewski, sp. nov., G. groenlandica Lohse; and G. sellmani Brundin.