Eremobatine solpugids possess a single claw on the tip of the first leg.  Most solpugids, and indeed, most arachnids, bear two claws.  The single claw of the eremobatines, which is flattened and has a broad base, is a unique inherited feature (a synapomorphy) shared by members of this distinctive lineage.  Four genera are known, three of which - Eremorhax, Eremocosta, and Eremobates - occur in California.  The peculiar genus Eremothera occurs in Arizona, Sonora, and Baja California, but has not yet been reported from California.

Highly magnified view of the
tarsal claw on the first leg