Calyptaulax is a genus of trilobites in the order Phacopida that existed during the middle and upper Ordovician in what is now the U.S. states of New York, Pennsylvania, Oklahoma, Illinois, Missouri, Virginia, Vermont, Nevada, Iowa, Wisconsin, Kentucky, and Iowa, as well as the Canadian provinces of Ontario, Newfoundland and Labrador, Quebec, and the territory of Nunavut. Other countries Calyptaulax fossils are known from include Ireland, Norway, Russia, and the United Kingdom.
Type species By original designation; Calyptaulax glabella Cooper, 1930: pp. 388 - 389, pl. 5, figs. 9 - 11. From the Matapedia Group (Ashgill), Perce, Quebec, Canada.Available Generic Names for Trilobites P.A. Jell and J.M. Adrain.
Other species Calyptaulax annulata Raymond, 1905 Calyptaulax callicephala Hall, 1847 Calyptaulax callirachis Cooper, 1953 Calyptaulax cornwalli Ross, Jr. and Barnes, 1967 Calyptaulax holstonensis Raymond, 1925 Calyptaulax incepta Whittington, 1965 Calyptaulax norvegicus Stormer, 1945 Calyptaulax sillimani Roy, 1941 Calyptaulax strasburgensis Ulrich and Delo, 1940
References
External links Calyptaulax at the Paleobiology Database