(Jointed Lycosa - a reference to a genus of wolf spider).
Named By: Hargar - 1874.
Classification: Arthropoda, Arachnida, Araneae, Mesothelae, Arthrolycosidae.
Species: A. antiqua (type), A. danielsi, A. carcinoides.
Size: Body length about 5 centimetres.
Known locations: Russia. USA.
Time period: Late Carboniferous to Permian.
Fossil representation: Few specimens.
Arthrolycosa is an example of one of the earliest spiders, and like its name sake the Lycosa genus, Arthrolycosa would have hunted on the ground. Web spinning would not be a development until much later which means that Arthrolycosa would have probably lurked near cover while waiting for prey to pass by. When close enough it would have been able to run after its prey before pinning it down with its fangs and injecting venom into its victim.