Relative Effects of Climate and Crowding on Wing Polymorphism in the Southern Ground Cricket, Allonemobius Socius (Orthoptera: Gryllidae)

Seasonal wing dimorphism and life cycle of the mole cricket Gryllotalpa orientalis (Orthoptera: Gryllotalpidae)

“…Seasonal wing polymorphism is often accompanied by a multivoltine life cycle, e.g., butterfly Pararge aegeria (Van Dyck & Wiklund, 2002), water strider Aquarius paludum (Harada, 1996), or southern ground cricket Allonemobius socius (Olvido et al, 2003). In G. orientalis, seasonal wing dimorphism is maintained in a univoltine life cycle with two different developmental processes linked to the overwintering form.…”

“…Seasonal wing polymorphism has been found in organisms with multivoltine life cycles, and the favoured morph differs between the first and second or later generations (e.g., Harada, 1996;Van Dyck & Wiklund, 2002;Olvido et al, 2003). In seasonal polymorphism, the selection pressure varies seasonally, and the favoured morph is fixed for each season.…”

Experimental evidence for density-determined wing dimorphism in two bush-crickets (Ensifera: Tettigoniidae)

“…Within Orthoptera, research on the causes of macroptery has mainly focussed on Gryllidae (e.g. Masaki & Shimizu, 1995;Olvido et al, 2003;Endo, 2006) and phase dimorphism in locusts (e.g. Uvarov, 1966;Tanaka et al, 1993;Bouaïchi & Simpson, 2003).…”

New Species of the GenusAnisophyaKarabag from Chile (Orthoptera: Tettigoniidae: Phaneropterinae)

“…However, in these groups differences in wing length are generally expressed as a function of the hind wing only, and tegminal length is essentially the same for both long-winged and short-winged forms (Masaki & Schimizu 1995). In these groups factors determining wing polymorphism include climate during nymphal development and overcrowding of individuals within populations (Olvido et al 2003). In the Tettigoniidae (including Phaneropterinae) there are no reported cases of wing-length dimorphism.…”