Thyreosthenius is a genus of sheet weavers that was first described by Eugène Louis Simon in 1884.
Species it contains only two species. Thyreosthenius biovatus (O. Pickard-Cambridge, 1875) – Europe, Russia (Europe to Far North East) Thyreosthenius parasiticus (Westring, 1851) – North America, Europe, Caucasus, Russia (Europe to Far East)
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