Californiulus euphanus (Chamberlin, 1938) North America, USA, Washington, Skamania Co. Photo courtesy of W. P. Leonard.

Paeromopus angusticeps buttensis Chamberlin, 1954, with shed segment around body at seg. 10. North America, USA, California, Shasta Co., outside Samwell Cave. Photo courtesy of W.P. Leonard.

Paeromopus a. angusticeps Chamberlin, 1949. North America, USA, California, Santa Cruz Co., Empire Cave. Photo by N. Slusser.

Californiulus euphanus (Chamberlin, 1938). North America, USA, Washington, Klickitat Co., outside Catherine Cave. Photo courtesy of W.P. Leonard.

Californiulus euphanus (Chamberlin, 1938). Note walking gait. North America, USA, Washington, Skamania Co., Cook. Photo courtesy of W. P. Leonard.