Galeaspida - Polybranchiaspidida

Full reference: M. Zhu and Z.-K. Gai. 2007. Phylogenetic relationships of Galeaspids (Agnatha). Frontiers of Biology in China 2(2):151-169

Parent taxon: Galeaspida according to Z. Gai et al. 2015

See also Zhu and Gai 2007

Sister taxa: Dayongaspidae, Diploholcaspis, Eugaleaspidiformes, Hanyangaspidae, Hyperaspis, Microphymaspis, Pseudoduyunaspis, Xiushuiaspidae

Subtaxa: Geraspididae Huananaspiformes Polybranchiaspidiformes Zhaotongaspididae

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Ecology:

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