Shuster, Carl N., Jr. Formerly, Bureau of Water Hygiene, U.S. Public Health Service, Cincinnati, Ohio.
Babcock, Loren E. Department of Geological Sciences, Ohio State University, Columbus, Ohio.
- Fossil record
- Life history
- Links to Primary Literature
- Additional Readings
An order (xiphosurids, or horseshoe crabs) of the class Xiphosura (phylum Arthropoda). These “sword-tailed” arthropods are a classic example of a “living fossils” group that has seemingly changed little over a period of many millions of years. See also: Living fossils
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