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Eugaleaspidiformes

Extinct order of jawless vertebrates From Wikipedia, the free encyclopedia

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]

Phylum:Chordata
Infraphylum:Agnatha
Class:Galeaspida
Order:Eugaleaspidiformes
Lui, 1965
Quick facts Scientific classification, Families and Genera ...
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
  • Anjiaspis
  • Nochelaspis
  • Yunnanogaleaspis
  • Tujiaaspidae
  • Shuyuidae
  • Sinogaleaspidae
    • Rumporostralis
    • Sinogaleaspis
  • Yongdongaspidae
  • Tridensaspidae
    • Falxcornus
    • Pterogonaspis
    • Tridensaspis
  • Eugaleaspididae
    • Dunyu
    • Eugaleaspis
    • Xitunaspis
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Phylogeny

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

Eugaleaspidiformes
Tujiaaspidae

Miaojiaaspis

Tujiaaspis

Shuyuidae

Shuyu

Meishanaspis

Qingshuiaspis

Jiangxialepis

Anjiaspis

Sinogaleaspidae

Sinogaleaspis

Rumporostralis

Yongdongaspidae

Yongdongaspis

Yunnanogaleaspis

Nochelaspis

Tridensaspidae

Falxcornus

Tridensaspis

Pterogonaspis

Eugaleaspidae

Eugaleaspis

Xitunaspis

Dunyu

References

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