Taxa included

Welbourn, W.C. (1979). Invertebrate fauna of the earth cracks of Wupatki National Monument, Arizona. In: Linn, R.M. (ed.) Proceedings of the First Conference on Scientific Research in the National Parks U.S. Department of the Interior, New Orleans 1: 387–391.

Taxon
Larca welbourni (Muchmore, 1981) (Pseudoscorpiones: Larcidae) 390, Archeolarca
Pseudogarypus hypogeus Muchmore, 1981 (Pseudoscorpiones: Pseudogarypidae) 390, Pseudogarypus