| Styloichthys Temporal range: Early Devonian,
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| View of snout and orbit region of Styloichthys | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Sarcopterygii |
| Class: | Actinistia |
| Order: | Coelacanthiformes |
| Genus: | †Styloichthys Zhu & Yu, 2001 |
| Type species | |
| Styloichthys changae Zhu & Yu, 2001
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| Styloichthys range (in blue) | |
Styloichthys (Greek: stylo "pillar" and ichthys "fish"; "Pillar fish") is a prehistoric sarcopterygian, lobe-finned fish which lived during the Early Devonian (Lochkovian) period of East Yunnan, South China.
Because it is clear that the jaws and skull of Styloichthys share many derived features with coelacanthiformes[1] it is placed as the oldest coelacanth.
- ^ Friedman, Matt (August 10, 2007). "Styloichthys as the oldest coelacanth: implications for early osteichthyan interrelationships" (PDF). Journal of Systematic Palaeontology. 5 (3): 289–343. Bibcode:2007JSPal...5..289F. doi:10.1017/S1477201907002052. S2CID 83712134. Retrieved 2007-12-28. [permanent dead link]