Porrhomma

Porrhomma is a genus of sheet weavers that was first described by Eugène Louis Simon in 1884.

Species
it contains twenty-five species, found in Europe and Asia:
 * Porrhomma altaica Růžička, 2018 – Altai (Russia, Kazakhstan)
 * Porrhomma boreale (Banks, 1899) – Russia (Urals to Far East), Mongolia, USA (Alaska)
 * Porrhomma borgesi Wunderlich, 2008 – Azores
 * Porrhomma cambridgei Merrett, 1994 – England to Italy and Czechia
 * Porrhomma campbelli F. O. Pickard-Cambridge, 1894 – Europe to Russia (Middle Siberia)
 * Porrhomma cavernicola (Keyserling, 1886) – USA
 * Porrhomma convexum (Westring, 1851) (type) – USA, Canada, Greenland, Europe, Caucasus, Russia (Europe, West Siberia), Kazakhstan
 * Porrhomma egeria Simon, 1884 – Europe
 * Porrhomma errans (Blackwall, 1841) – Western to Central Europe, Italy
 * Porrhomma frasassianum Weiss & Sarbu, 2021 – Italy
 * Porrhomma longjiangense Zhu & Wang, 1983 – Russia (South Siberia to Far East), China
 * Porrhomma magnum Tanasevitch, 2012 – Russia (South Siberia), Kazakhstan
 * Porrhomma microcavense Wunderlich, 1990 – Belgium, Netherlands, Germany, Czechia, Slovakia, Russia (Europe)
 * Porrhomma microphthalmum (O. Pickard-Cambridge, 1871) – Europe, Russia (Europe, Caucasus), Turkey, Iran, Kazakhstan, China
 * Porrhomma microps (Roewer, 1931) – Europe
 * Porrhomma montanum Jackson, 1913 – Europe, Russia (Europe to Far East), Korea, Japan
 * Porrhomma nekolai Růžička, 2018 – Russia (Far East), Canada, USA
 * Porrhomma oblitum (O. Pickard-Cambridge, 1871) – Europe
 * Porrhomma ohkawai Saito, 1977 – Japan
 * Porrhomma pallidum Jackson, 1913 – Europe, Russia (Europe to Far East), Iran, Kazakhstan
 * Porrhomma profundum M. Dahl, 1939 – Germany, Czechia, Slovakia, Hungary, Romania, Serbia, Bulgaria
 * Porrhomma pygmaeum (Blackwall, 1834) – Europe, Turkey, Caucasus, Russia (Europe to Far East), Central Asia, Pakistan, Japan
 * Porrhomma rakanum Yaginuma & Saito, 1981 – Japan
 * Porrhomma rosenhaueri (L. Koch, 1872) – Western, Southern and Central Europe, Russia (Altai)
 * Porrhomma terrestre (Emerton, 1882) – Canada, USA