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Eochondrosteus Temporal range: Early Triassic PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Acipenseriformes
Genus:	†Eochondrosteus Lu, Li et Yang, 2005
Type species
†Eochondrosteus sinensis Lu, Li et Yang, 2005

Eochondrosteus is a genus of extinct actinopterygian (ray-finned fish), comprising one species, E. sinensis (monotypy) from the Early Triassic strata in Gansu Province (Beishan Hills), China (previously interpreted as Permian in age). It is suggested to be the most basal acipenseriform (sturgeon, paddlefish, and their fossil relatives). It was originally described in 2005, and then redescribed in 2020 in Chinese. Other authors have considered the placement of Eochondrosteus within the Acipenseriformes as tentative.

References

1. ^ Lu, Liwu; Tan, Kai; Wang, Xi (2020). "Redescription of Eochondrosteus sinensis (Acipenseriformes, Actinopterygii) and its geological age". Earth Science Frontiers. 27 (6): 371–381.
2. Liwu Lu, Daqing Li & Liangfeng Yang (2005). "Notes on the discovery of Permian Acipenseriformes in China". Chinese Science Bulletin. 50 (12): 1279. doi:10.1360/982005-410. ISSN 1001-6538.
3. Hilton, Eric J.; Forey, Peter L. (2009). "Redescription of †Chondrosteus acipenseroides Egerton, 1858 (Acipenseriformes, †Chondrosteidae) from the lower Lias of Lyme Regis (Dorset, England), with comments on the early evolution of sturgeons and paddlefishes". Journal of Systematic Palaeontology. 7 (4): 427–453. doi:10.1017/S1477201909002740. S2CID 86821521.

v t e Chondrostei
Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Clade: Actinopteri Actinopterygii see Actinopterygii Chondrostei see below↓ Chondrostei
Chondrostei †Birgeria? †Errolichthys? †Gualolepis? †Neochallaia †Bobasatraniiformes? †Guildayichthyidae? †Saurichthyiformes? †Coccolepididae Barbalepis Coccolepis Condorlepis Iyalepis Morrolepis Plesiococcolepis Sunolepis Toarcocephalus Acipenseriformes †Cylindracanthus? †Eochondrosteus †Chondrosteidae Chondrosteus Gyrosteus Strongylosteus †Peipiaosteidae Liaosteus Peipiaosteus Spherosteus Stichopterus Yanosteus Acipenseroidei Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Engdahlichthys Huso †Priscosturion †Protoscaphirhynchus Pseudoscaphirhynchus Scaphirhynchus

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• Acipenseriformes
• Prehistoric ray-finned fish genera
• Triassic bony fish
• Chondrostei stubs
• Prehistoric Chondrostei stubs
• Triassic fish stubs