Gnathonarium is a genus of dwarf spiders that was first described by Ferdinand Anton Franz Karsch in 1881.
Species it contains seven species and one subspecies, found in Canada, China, Israel, Japan, Kazakhstan, Korea, Mongolia, the Philippines, Russia, Turkey, and the United States: Gnathonarium biconcavum Tu & Li, 2004 – China Gnathonarium dentatum (Wider, 1834) (type) – Europe, North Africa, Turkey, Caucasus, Russia (Europe to Far East), Kazakhstan, Central Asia, China, Korea, Japan Gnathonarium d. orientale (O. Pickard-Cambridge, 1872) – Israel Gnathonarium exsiccatum (Bösenberg & Strand, 1906) – Japan Gnathonarium gibberum Oi, 1960 – Russia (South Siberia), China, Korea, Japan Gnathonarium luzon Tanasevitch, 2017 – Philippines (Luzon) Gnathonarium suppositum (Kulczyński, 1885) – Russia (Middle Siberia to Far East), USA (Alaska), Canada Gnathonarium taczanowskii (O. Pickard-Cambridge, 1873) – Russia (Urals to Far East), Kazakhstan, Mongolia, China, USA (Alaska), Canada
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