Chitinozoans from the Late Precambrian Chuar Group of the Grand Canyon, Arizona
- 18 February 1977
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 195 (4279), 676-679
- https://doi.org/10.1126/science.195.4279.676
Abstract
Carbonaceous shales of the late Precambrian Chuar Group of the Grand Canyon, Arizona, contain abundant and well-preserved chitinozoans. The occurrence of these distinctive, tear- and flask-shaped microfossils, the oldest chitinozoans now known and the first to be reported from the Precambrian, seems to suggest that heterotrophic protists (or primitive metaozoans) were extant at least as early as about 750 ± 100 million years ago.This publication has 15 references indexed in Scilit:
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