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n.1.(Paleon.) A genus of trilobites found in the Silurian and Devonian formations. Phacops bufo is one of the most common species.
References in periodicals archive ?
Don Alfonso propuso bautizar el especimen de trilobite indicado como Phacops esparsocostarricensis; sin embargo, el trilobite fue identificado como un tipico ejemplar de Metacryphaeus tuberculatus por el Dr.
Deeper water biofacies constituting the upper portion of the stratigraphic section are dominated by a trilobite-cephalopod-gastropod assemblage primarily defined by Phacops sp.
Together, we counted rows of Phacops rana's eyes to show that the sudden increase in number demonstrated sudden speciation; while abroad, Scots working in the same formation, once joined to ours, counted ribs to prove that change was gradual.