Fossils of Tricrepicephalus are widespread in Late Cambrian deposits in North America , but is also known from one location in South - America .
Its species lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period .
Fossils of Tricrepicephalus are widespread in Late Cambrian Period deposits in North America , but is also known from one location in South - America .
Its species lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period .