Trilobita - Agnostida - Peronopsidae

Parent taxon: Peronopsidae according to P. A. Jell and J. M. Adrain 2003

Sister taxa: Archaeagnostus, Axagnostus, Diplorrhina, Peronopseinae, Peronopsella, Peronopsis, Phalacrominae

Subtaxa: Svenax pusillus

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Type: Agnostus pusillus

Ecology: slow-moving nektonic suspension feeder