Trilobita - Agnostida - Agnostidae

Full reference: G. K. Ergaliev. 1980. Trilobity srednego i verkhnego Kembriya Malogo Karatau [Middle and Upper Cambrian trilobites from Malyy Karatau] 1-211

Parent taxon: Agnostidae according to G. K. Ergaliev and F. G. Ergaliev 2008

Sister taxa: Acmarhachis, Acutatagnostus, Agnostardis, Agnostus, Ammagnostus, Biciragnostus, Connagnostus, Eurudagnostus, Glyptagnostus, Gymnagnostus, Hadragnostus, Homagnostus, Idolagnostus, Innitagnostus, Ivshinagnostus, Kormagnostella, Kormagnostus, Leiagnostus, Lotagnostus, Micragnostus, Neoagnostus, Oncagnostus, Oxyagnostus, Phalagnostus, Proagnostus, Quadrahomagnostus, Strictagnostus, Trilobagnostus

Subtaxa: Formosagnostus convexus, Formosagnostus formosus, Formosagnostus zhanatasicus

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Type: Formosagnostus formosus

Ecology: slow-moving nektonic suspension feeder