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Yongdongaspis

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Yongdongaspis
Temporal range: Llandovery,
~436 Ma
Telychian
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Galeaspida
Order: Eugaleaspidiformes
Family: Yongdongaspididae
Chen et al., 2022
Genus: Yongdongaspis
Chen et al., 2022
Species:
Y. littoralis
Binomial name
Yongdongaspis littoralis
Chen et al., 2022

Yongdongaspis, colloquially known as the Binhai Yongdong,[1][2] is an extinct genus of galeaspid vertebrates within the monotypic family Yongdongaspididae. The type species is Y. littoralis and it was found in the Silurian-aged Huixingshao Formation of China.[3] This makes it the oldest known fish fossil discovered in Chongqing to date.

Discovery and naming

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The holotype was excavated in July 2020 and was prepared in 2021, before being named as the new species Yongdongaspis littoralis in July 2022.[3]

Description

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Based on the holotype, Yongdongaspis only grew to around 5 centimetres (2.0 in) long.[2][3]

References

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  1. ^ "Over 400-mln-yr-old fossil of fish found in China - China.org.cn". www.china.org.cn.
  2. ^ a b "They find remains of a fish that lived 400 million years ago". March 4, 2022.
  3. ^ a b c Chen, Yang; Gai, Zhikun; Li, Qiang; Wang, Jianhua; Peng, Lijian; Wei, Guangbiao; Zhu, Min (April 2022). "A New Family of Galeaspids (Jawless Stem-Gnathostomata) from the Early Silurian of Chongqing, Southwestern China". Acta Geologica Sinica - English Edition. 96 (2): 430–439. Bibcode:2022AcGlS..96..430C. doi:10.1111/1755-6724.14909. S2CID 247063430.