Robertus is a genus of comb-footed spiders that was first described by Octavius Pickard-Cambridge in 1879. It is considered a senior synonym of Garritus.
Species it contains forty-seven species, found in Europe, Asia, North America, the Congo, and on Greenland: Robertus alpinus Dresco, 1959 – Italy Robertus arcticus (Chamberlin & Ivie, 1947) – USA (Alaska) Robertus arundineti (O. Pickard-Cambridge, 1871) – Europe, Turkey, Caucasus, Russia (Europe to South Siberia), Kazakhstan, Central Asia, China Robertus banksi (Kaston, 1946) – USA, Canada Robertus borealis (Kaston, 1946) – USA, Canada Robertus brachati Wunderlich, 2011 – Turkey Robertus calidus Knoflach, 1995 – Congo Robertus cantabricus Fage, 1931 – Spain Robertus cardesensis Dresco, 1959 – Spain Robertus crosbyi (Kaston, 1946) – USA, Canada Robertus emeishanensis Zhu, 1998 – China Robertus eremophilus Chamberlin, 1928 – USA Robertus floridensis (Kaston, 1946) – USA Robertus frivaldszkyi (Chyzer, 1894) – Central and south-eastern Europe Robertus frontatus (Banks, 1892) – USA, Canada Robertus fuscus (Emerton, 1894) – USA, Canada, Greenland Robertus golovatchi Eskov, 1987 – Georgia Robertus heydemanni Wiehle, 1965 – Sweden, Germany, Austria, Italy, Romania, Ukraine, Russia (Europe to West Siberia), Kazakhstan Robertus insignis O. Pickard-Cambridge, 1908 – Europe Robertus kastoni Eskov, 1987 – Russia (Middle Siberia to Russian Far East), Japan Robertus kuehnae Bauchhenss & Uhlenhaut, 1993 – Belgium, Switzerland, Germany, Austria Robertus laticeps (Keyserling, 1884) – USA Robertus lividus (Blackwall, 1836) – USA (Alaska), Europe, Caucasus, Russia (Europe to Far East), Iran Robertus longipalpus (Kaston, 1946) – USA, Canada Robertus lyrifer Holm, 1939 – Iceland, Scandinavia, Austria, Russia (Europe to Far East), Canada Robertus mazaurici (Simon, 1901) – France Robertus mediterraneus Eskov, 1987 – Mediterranean, Switzerland, Austria, Eastern Europe, Caucasus Robertus monticola Simon, 1914 – France Robertus naejangensis Seo, 2005 – Korea Robertus neglectus (O. Pickard-Cambridge, 1871) (type) – Europe, Russia (Europe to South Siberia), Kazakhstan Robertus nipponicus Yoshida, 1995 – Japan Robertus nojimai Yoshida, 2002 – Japan Robertus ogatai Yoshida, 1995 – Japan Robertus peregrinus Yang, Irfan & Peng, 2019 – China Robertus potanini Schenkel, 1963 – China Robertus pumilus (Emerton, 1909) – USA Robertus riparius (Keyserling, 1886) – USA, Canada Robertus saitoi Yoshida, 1995 – Japan Robertus scoticus Jackson, 1914 – Europe, Caucasus, Russia (Europe to Middle Siberia) Robertus sibiricus Eskov, 1987 – Russia (Middle Siberia to Far East), Japan Robertus similis (Kaston, 1946) – USA Robertus spinifer (Emerton, 1909) – USA Robertus subtilis Seo, 2015 – Korea Robertus truncorum (L. Koch, 1872) – France to Ukraine Robertus ungulatus Vogelsanger, 1944 – Europe, Russia (South Siberia to Far East), China Robertus ussuricus Eskov, 1987 – Russia (Far East) Robertus vigerens (Chamberlin & Ivie, 1933) – USA, Canada
In synonymy: R. asper (O. Pickard-Cambridge, 1871) = Robertus neglectus (O. Pickard-Cambridge, 1871) R. exortus (Drensky, 1929, T from Agroeca) = Robertus frivaldszkyi (Chyzer, 1894) R. fuscus (Emerton, 1911) = Robertus fuscus (Emerton, 1894) R. grasshoffi Wunderlich, 1973 = Robertus neglectus (O. Pickard-Cambridge, 1871) R. palustris (Banks, 1892) = Robertus laticeps (Keyserling, 1884) R. paradoxus Miller, 1967 = Robertus ungulatus Vogelsanger, 1944 R. terrestris (Emerton, 1913) = Robertus frontatus (Banks, 1892) R. umbilicatus Denis, 1961 = Robertus mazaurici (Simon, 1901)
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