Trilobita - Agnostida - Clavagnostidae

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

Sister taxa: Clavagnostus, Paraclavagnostus, Triadaspis, Utagnostus

Subtaxa: Aspidagnostus laevis, Aspidagnostus lunulosus, Aspidagnostus orientalis, Aspidagnostus primitivus, Aspidagnostus rugosus

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Ecology: slow-moving nektonic suspension feeder