Sweltsa tamalpa (Ricker, 1952)

Stark, Bill P. & Baumann, Richard W., 2007, Sweltsa Yurok (Plecoptera: Chloroperlidae), A New Stonefly From California, U. S. A., Illiesia 3 (10), pp. 95-101 : 95

The Sweltsa tamalpa group

Members of this group have a relatively short, slender, hairy epiproct with bare tip and a median, bare knob on male tergum 9; the epiproct apex is expanded near midlength, usually giving the structure a foot shaped appearance in lateral aspect. Female subgenital plates are more or less triangular, have a basal transverse groove, and are relatively strongly sclerotized. Eggs are oval with coarsely pitted chorions and no collar. Adults are smaller than most Sweltsa and have pale yellow-brown coloration patterned with dusky brown. The known distribution for the group is centered on the northern California Coast Range with one record of S. tamalpa from as far south as the Pinnacles National Monument in San Benito Co.