Callavia vs Redlichia
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Callavia
Callavia is a genus of olenellid trilobites from the early Cambrian Period. It is especially associated with Newfoundland, Canada, and other parts of Laurentia. The genus gives its name to the Callavia Biozone, a biostratigraphic interval used in correlating lower Cambrian rocks in the region. Callavia is important in research on the early history of trilobites, the development of olenellid body p...
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Redlichia
Redlichia is an Early Cambrian trilobite genus recorded from Australia and Asia and assigned to the redlichiid trilobites. It is used as an index fossil for lower Cambrian deposits, so its occurrence can help correlate rocks from this part of the geological record. The genus is also associated with an elongated pleural region and large genal spines, producing a distinctive outline. It is relevant...
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