Eugaleaspidiformes
| Eugaleaspidiformes Temporal range:
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|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Infraphylum: | Agnatha |
| Class: | †Galeaspida |
| Order: | †Eugaleaspidiformes Lui, 1965 |
| Families and Genera | |
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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
An analysis by Zhang and colleagues in 2026 obtained the following phylogenetic tree by strict consensus of 6 maximum parsimony trees:[3]
| Eugaleaspidiformes |
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References
- ^ 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.
- ^ Zicha, Ondrej. "BioLib: Biological library". www.biolib.cz. Retrieved 20 December 2019.
- ^ Zhang et al. 2026, p. 311.
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:10.1007/s12583-026-0504-6.