This
rare trilobite is a member of Suborder
Olenellina, Superfamily Fallotaspidoidea, Family Fallotaspidae.
The genus Fallotaspis is cited by Fortey (2000) as containing the
oldest trilobite in the fossil record. The Campito Formation is
a 1300 m thick sequence of siliciclastic rocks with extensive outcrops
in both Western Nevada and Eastern California. The stratigraphic
range is accordingly large, varying from the Late Precambrian to
the Early Cambrian.
Palmer, A. R. (1964) An unusual Lower Cambrian trilobite
faunule from Nevada. in Contributions to Paleontology, Geological
Survey Professional Paper 483-F, pp. 1-13, 3 pls.
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