Very similar to G. lugubris, but palpal tibial apophysis with bifid tip. The ventral part is lamellous and rectangular in appearance; the dorsal part is conical, tooth-like and bent inwards. Distal part of median apophysis pointing in a regular and tapered reddish triangle, slightly twisted retrolaterally. Embolus with inconspicuous prolateral protuberance which, more precisely, takes the form of a little basal tooth, black, bifid, the triangular upper part thicker. Opisthosoma dorsally light grey brown, ventrally paler.Body length male: 11.8-12 mm
Generally as in male.
Epigyne/vulva: Scape and epigynal cavity relatively wide, ratio width of hood (scape)/width of atrium 0.47-0.56. Armature of epigynal hood thick, reaching the front edges both of the median epigynal ducts and the epigynal cavity. Median epigynal ducts rather short and X-shaped. Head of receptacles directed downward. Copulatory ducts coiled.
Because of its bifid tibial apophysis and potentially similar ecological preferences (under stones, in dry and warm conditions - alpine and limestone grassland, rock steppes, meadow and forest clearing -), males of G. ogeri probably have been misidentified as G. occidentalis in its ditribution area.
Frequency: Can be locally frequent.