†Hadragnostus Opik 1967 (trilobite)
Trilobita - Agnostida - Agnostidae
Synonym: Kunshanagnostus Qian and Zhou 1984
Parent taxon: Agnostidae according to H. B. Whittington et al. 1997
Sister taxa: Acmarhachis, Acutatagnostus, Agnostardis, Agnostus, Ammagnostus, Biciragnostus, Connagnostus, Eurudagnostus, Formosagnostus, Glyptagnostus, Gymnagnostus, Homagnostus, Idolagnostus, Innitagnostus, Ivshinagnostus, Kormagnostella, Kormagnostus, Leiagnostus, Lotagnostus, Micragnostus, Neoagnostus, Oncagnostus, Oxyagnostus, Phalagnostus, Proagnostus, Quadrahomagnostus, Strictagnostus, Trilobagnostus
Subtaxa: Hadragnostus modestus, Hadragnostus quadratiformis
Ecology: slow-moving nektonic suspension feeder