| Gyracanthidae Temporal range: Lochkovian - Moscovian
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| Reconstruction of Gyracanthus | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Acanthodii |
| Order: | †Climatiiformes (?) |
| Family: | †Gyracanthidae Woodward, 1906 |
| Genera | |
Gyracanthidae is a family of extinct fish belonging to the class Acanthodii, known from early Devonian to late Carboniferous. Members are characterized by large, broad-based, paired fin spines with the pectoral fin spines having a distinct longitudinal curvature.[1] Although it was originally classified in order Climatiiformes, later research questioned this.[2]
- ^ Warren, Anne; Currie, Bryan P.; Burrow, Carole; Turner, Susan (2000-06-27). "A redescription and reinterpretation of Gyracanthides murrayi Woodward 1906 (Acanthodii, Gyracanthidae) from the Lower Carboniferous of the Mansfield Basin, Victoria, Australia". Journal of Vertebrate Paleontology. 20 (2): 225–242. doi:10.1671/0272-4634(2000)020[0225:ARAROG]2.0.CO;2. ISSN 0272-4634. S2CID 130940413.
- ^ Turner, Susan; Burrow, Carole J.; Warren, Anne (2005). "Gyracanthides hawkinsi sp. nov. (Acanthodii, Gyracanthidae) from the Lower Carboniferous of Queensland, Australia, with a Review of Gyracanthid Taxa". Palaeontology. 48 (5): 963–1006. doi:10.1111/j.1475-4983.2005.00479.x. ISSN 0031-0239. S2CID 84735724.