Trilobita - Agnostida - Agnostidae

Alternative combination: Proagnostus modestus

Synonyms: Formosagnostus latus Peng 1987, Kunshanagnostus kunshanensis Qian and Zhou 1984

Belongs to Hadragnostus according to S. Peng and R. A. Robison 2000

Sister taxon: Hadragnostus quadratiformis