Trilobita - Agnostida - Diplagnostidae

Alternative combination: Agnostus planicauda

Synonyms: Diplagnostus qinlingensis Yang et al. 1993, Diplagnostus zhexiensis Lu and Lin 1989

Belongs to Diplagnostus according to Jell and Hughes 1997

Sister taxa: Diplagnostus floralis, Diplagnostus pseudofloralis, Diplagnostus pyriformis