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// Workers AI · dad joke modeWhat did the Eugaleaspidiformes say? I'm fin-ally home.

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Eugaleaspidiformes
Temporal range: Telychian–Lower Devonian
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: Galeaspida
Order: Eugaleaspidiformes
Lui, 1965
Families and Genera

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.[1] The order was first named by Lui in 1965.[2]

Phylogeny

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An analysis by Zhang and colleagues in 2026 obtained the following phylogenetic tree by strict consensus of 6 maximum parsimony trees:[3]

Eugaleaspidiformes

References

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  1. Shan, Xianren; Gai, Zhikun; Lin, Xianghong; Chen, Yang; Zhu, Min; Zhao, Wenjin (2022-05-15). "The oldest eugaleaspiform fishes from the Silurian red beds in Jiangxi, South China and their stratigraphic significance". Journal of Asian Earth Sciences. 229 105187. Bibcode:2022JAESc.22905187S. doi:10.1016/j.jseaes.2022.105187. ISSN 1367-9120. S2CID 247493604.
  2. Zicha, Ondrej. "BioLib: Biological library". www.biolib.cz. Retrieved 20 December 2019.
  3. Zhang et al. 2026, p. 311.

Works cited

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  • 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:10.1007/s12583-026-0504-6.