californicus Humbert & Saussure, 1870: 177 [ Spirostreptus].

California. Unspecified number of ♂.

Saussure & Humbert (1872) gave a more detailed redescription, implying that they only had one specimen. No specimens found in the MHNG. There is a ♂ type specimen, collected in California by Parreyss, in the NHMW (Inventory number 2168, Acquisition number 1866.I.43). The Acquisition Register shows that the lot contained only one specimen, so this can be considered the holotype. Hoffman (1999: 36) considered that the placement of this species as a member of the genus Spirostreptus rather than Spirobolus in the original description was probably a lapsus calami.

A junior synonym of Tylobolus uncigerus (Wood, 1864) (photo P. Schwendinger).