Calyptaulax

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: †Trilobitomorpha
Classis: †Trilobita
Ordo: †Phacopida
Subordo: †Phacopina
Superfamilia: Phacopoidea
Familia: Pterygometopidae
Genus: Calyptaulax

Calyptaulax (Cooper, 1930)[1] 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.
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.[2]
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

Cooper, G. A. 1930. "Part II. New species from the Upper Ordovician of Perce. In Schuchert, C. & Cooper, G. A., Upper Ordovician and Lower Devonian stratigraphy and palaeontology of Perce, Quebec". Am. J. Sci., New Haven, (5) 20: 265-288, 365-392, pls 1-5.
Available Generic Names for Trilobites P.A. Jell and J.M. Adrain.