title: Phanerozoic-cryptozoic and related transitions: new evidence.
abstract: The fossil Pteridinium, a distinctive component of a worldwide early metazoan (Ediacaran)assemblage, is provisionally recorded from probable early Cambrian strata in eastern California. In context with other evidence, this finding implies a Cambrian age for the Ediacaran fauna and approximate coincidence of limits between Phanerozoic-Cryptozoic, Paleozoic-Precambrian, and Cambrian-Precambrian.
authors.forename: P E
authors.initials: PE
authors.lastname: Cloud
authors.forename: C A
authors.initials: CA
authors.lastname: Nelson