Calyptaulax
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, 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. It was described by Cooper in 1930, and the type species is Calyptaulax glabella.Species
- Calyptaulax annulata Raymond, 1905
- Calyptaulax callicephala Hall, 1847
- Calyptaulax callirachis Cooper, 1953
- Calyptaulax cornwalli Ross, Jr. and Barnes 1967
- Calyptaulax glabella Cooper, 1930
- Calyptaulax holstonensis Raymond 1925
- Calyptaulax incepta Whittington 1965
- Calyptaulax norvegicus Stormer 1945
- Calyptaulax sillimani Roy 1941
- Calyptaulax strasburgensis Ulrich and Delo, 1940
