Eugaleaspidiformes

Eugaleaspidiformes (from Latin, "Helmet shield shapes") is an extinct order of jawless marine and freshwater fish, which lived in East Asia from the Telychian to the Lower Devonian period. The order was first named by Lui in 1965.

Phylogeny

An analysis by Zhang and colleagues in 2026 obtained the following phylogenetic tree by strict consensus of 6 maximum parsimony trees:

Works cited

• Zhang, Yumeng; Shan, Xianren; Lin, Xianghong; Gai, Zhikun; Donoghue, Philip C. J. (February 2026). "A New Dayongaspid Galeaspid from the Silurian of the Lower Yangtze Region: Implications for Biogeography and the Evolution of Key Adaptations in Galeaspids". Journal of Earth Science. 37 (1): 303–316. doi:.