Occasjapyx kofoidi (Silvestri, 1928)

Shasta County: Potter Creek Cave (type locality), 3 specimens, 1903, W. Sinclair, as Japyx kofoidi (Silvestri 1928), and 8 June 1995, D. Ubick, 1 indiv. (CAS).

Reddell (1983) does not consider this species to be cave-adapted (troglomorphic). Rudolph et al. (1985) reported a collection of Japygidae in Samwel Cave, which is only 16 km from the type locality. G.O. Graening inventoried both caves in 2012 and could not find any diplurans.