Publishing 1936–1939
4 type localities across 2 genera
Chamberlin, R. V. & Ivie, W. (1939). New tarantulas from the southwestern states. Bulletin of the University of Utah 29(11): 1-17.
Chamberlin, R. V. & Ivie, W. (1936). New spiders from Mexico and Panama. Bull. Univ. Utah 27(5): 1-103.