|Named By:||Hargar in 1874|
|Time Period:||Late Carboniferous to Late Permian|
|Size:||Body length about 5 centimetres|
|Classification:||| Arthropoda | Arachnida | Araneae | Mesothelae | Arthrolycosidae ||
Arthrolycosa (meaning wolf [spider] with joints) is an extinct genus of arachnids, possibly spiders, that lived about 300-250 million years ago.
Fossils have been found Mazon Creek USA and in the Kirov Oblast region of Russia.
Species of Arthrolycosa are estimated to have grown to a length of 2 inches (5 centimeters) and may have preyed upon insects and other smaller animals that lived alongside them.