Gumuaspis Wang & Wang 1992 Platylomaspis Gai et al. 2018 Nanningaspis Gai et al. 2018 Laxaspis Liu 1975 Family Geraspididae Pan & Chen 1993 Geraspis Pan & Chen 1993 Kwangnanaspis Cao 1979 Family Pentathyraspididae Pan 1992 Pentathyraspis Pan 1992 Microhoplonaspis Pan 1992 Family Duyunolepididae Pan & Wang 1978a Duyunolepis Pan & Wang 1982 Pseudoduyunolepis Paraduyunolepis Pan & Wang 1978 Neoduyunolepis Pan & Wang 1978 Lopadaspis Wang et al. 2002 Family Hyperaspididae Pan 1992 Hyperaspis Pan 1992 Family Polybranchiaspididae Liu 1965 Altigibbaspis Liu, Gai & Zhu 2017 Polybranchiaspis Liu 1965 Bannhuanaspis Janvier, Than & Phuon 1993 Clororbis Pan & Ji 1993 Dongfangaspis Liu 1975 Siyingia Wang & Wang 1982 Diandongaspis Liu 1975 Damaspis Wang & Wang 1982 Cyclodiscaspis Liu 1975 Order Huananaspidiformes Janvier 1975 Family Sanqiaspididae Liu 1975 Sanqiaspis Liu 1975 Family Zhaotongaspididae Wang & Zhu 1994 Zhaotongaspis Wang & Zhu 1994 Wenshanaspis Zhao, Zhu & Jia 2002 Family Sanchaspididae Pan & Wang 1981 Sanchaspis Pan & Wanao 1981 (not to be confused with Sanqiaspis) Antiquisagittaspis Liu 1985 Family Gantarostrataspididae Wang & Wang 1992 Gantarostrataspis Wang & Wang 1992 Wumengshanaspis Wang & Lan 1984 Rhegmaspis Gai et al. 2015 Family Huananaspidae Liu 1973 Huanaspis Liu 1973 (sister-taxon of Macrothyraspinae) Asiaspis Pan ex Pan, Wang & Liu 1975 Nanpanaspis Liu 1965 Stephaspis Gai & Zhu 2007 Subfamily Macrothyraspinae Macrothyraspis Pan 1992 Lungmenshanaspis Pan & Wang 1975 Qingmenaspis Pan & Wang 1981 Sinoszechuanaspis Pan & Wang 1975 See also Osteostraci Heterostraci References Pan Jiang, "New Galeaspids (Agnatha) From the Silurian and Devonian of China In English" 1992, Janvier, Philippe. Early Vertebrates Oxford, New York: Oxford University Press, 1998. Long, John A. The Rise of Fishes: 500 Million Years of Evolution Baltimore: The Johns Hopkins University Press, 1996. Zhu Min, Gai Zhikun. "Phylogenetic relationships of Galeaspids (Agnatha)" 2007 :Higher Education Press and Springer-Verlag 2007 External links Galeaspida - tolweb.org Wenlock first appearances Early Devonian extinctions Prehistoric fish classes