Spider Cladogram

Araneae (spiders): 100 families
Opisthothelae (6 spinnerets): 99 families
Araneomorphae (anterior spinnerets replaced by colulus/cribellum; chelicerae diaxial; neocribellate): 84 families
Neocribellate (): 83 families
Araneoclada (): 81 families
Entelegynae (labium and sternum separated; fertilization ducts): 65 families
Canoe tapetum clade (tapetum of secondary eyes canoe-shaped): 52 families
Orbiculariae (orb web builders): 15 families
Araneoidea (cribellum lost; lateral eyes juxtaposed): 13 families
Derived araneoids (): 12 families
Extentae (legs I and II extended on web): 11 families
Reduced piriform clade (booklung covers smooth): 10 families
Araneid sheet web weavers (): 6 families
Spineless femur clade (): 4 families
Theridioidea (): 2 families
Nesticidae
Theridiidae