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

Julida: Paeromopodidae. Paeromopus angusticeps buttensis Chamberlin, 1954 (top) & Californiulus chamberlini (Brolemann, 1922) (bottom). North America, USA, California, Shasta Co., Gillman Rd. Photo courtesy of W.P. Leonard.

Julida: Paeromopodidae. 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.

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

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