†order Trinucleida Swinnerton 1915 (trilobite)

Trilobita - Trinucleida

Alternative spelling: Trinucleina

Parent taxon: Libristoma according to A. Bignon et al. 2020

See also Harrington and Leanza 1957

Sister taxa: Asaphida, Ptychopariida

Subtaxa: Alsataspididae Dionididae Liostracinidae Raphiophoridae Trinucleidae

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Ecology: fast-moving low-level epifaunal carnivore

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