Trilobita - Agnostida - Clavagnostidae

Parent taxon: Clavagnostidae according to H. B. Whittington et al. 1997

Sister taxa: Aspidagnostus, Clavagnostus, Paraclavagnostus, Triadaspis

Subtaxa: Utagnostus neglectus, Utagnostus songae, Utagnostus trispinulus

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Type: Utagnostus trispinulus

Ecology: slow-moving nektonic suspension feeder