Arthrolycosidae is an extinct family of arachnids, possibly spiders.

Fossils placed in the family were found in the Carboniferous to Permian.

They were considered by Alexander Petrunkevitch to be "mesotheles", i.e. placed in the spider suborder Mesothelae.

[2] However, Paul A. Selden has stated they only have "the general appearance of spiders", with segmented abdomens (opisthosomae), but no definite spinnerets.

[4] Genera placed in the Arthrolycosidae as of 2015[update] are shown below, together with the location of the fossils.