Xystodesmidae Cook, 1895
Sigmoria acuminata Hoffman, 1956
Sigmoria areolata Shelley, 1981
Sigmoria australis Shelley, 1986
Sigmoria austrimontis (Shelley, 1981)
Sigmoria brachygon Chamberlin, 1940
Sigmoria brooksi Hoffman, 1956
Sigmoria coronata Hoffman, 1949
Sigmoria dactylifera Hoffman, 1956
Sigmoria disjuncta Shelley, 1981
Sigmoria kleinpeteri (Hoffman, 1949)
Sigmoria laticurvosa Shelley, 1981
Sigmoria latior (Brölemann, 1900)
Sigmoria macra (Chamberlin, 1939)
Sigmoria mohincana (Causey, 1955)
Sigmoria nantahalae Hoffman, 1958
Sigmoria nigrimontis (Chamberlin, 1947)
Sigmoria pendulosa Shelley, 1986
Sigmoria plancus (Loomis, 1944)
Sigmoria quadrata Shelley, 1981
Sigmoria rigida Shelley, 1986
Sigmoria rubromarginata (Bollman, 1888)
Sigmoria sigirioides Shelley, 1981
Sigmoria simplex Shelley, 1981
Sigmoria stenogon Chamberlin, 1942
Sigmoria stenoloba Shelley, 1981
Sigmoria translineata Shelley, 1981
Sigmoria triangulata Shelley, 1981
Sigmoria truncata Shelley, 1981
Sigmoria tuberosa Shelley, 1981
Sigmoria watauga Shelley, 1986
Sigmoria whiteheadi Shelley, 1986
Sigmoria wrighti Hoffman, 1956
