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Arthrolycosa
Temporal range: Late Carboniferous – Late Permian
Arthrolycosa and lycosa by henrikossauros-d3f8hp3.jpg
A restored sketch sheet of Arthrolycosa antiqua compared with Lycosa tarantula
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae (?)
Family: Arthrolycosidae
Genus: Arthrolycosa
Harger, 1874
Type species
Arthrolycosa antiqua
Harger, 1874
Referred species
  • Arthrolycosa antiqua (Harger, 1874)
  • Arthrolycosa carcinoides
  • Arthrolycosa danielsi Petrunkevitch, 1913

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.

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