Trilobita - Phacopida - Pterygometopidae

Alternative combination: Calliops angusta

Full reference: B. N. Cooper. 1953. Trilobites from the Lower Champlainian formations of the Appalachian Valley. Geological Society of America Memoir 55:1-69

Belongs to Calyptaulax according to R. J., Jr. Ross and H. B. Barnes 1967

See also Cooper 1953

Sister taxa: Calyptaulax annulata, Calyptaulax brongniartii, Calyptaulax callicephalus, Calyptaulax callirachis, Calyptaulax cornwalli, Calyptaulax glabella, Calyptaulax holstonensis, Calyptaulax hunteri, Calyptaulax incepta, Calyptaulax norvegicus, Calyptaulax sillimani

Type specimen: USNM 78976a, a cephalon/head

Distribution: found only at D 829 CO ( of Nevada)

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Specimen images are retrieved through the ePANDDA API.