Gyracanthidae

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]

Gyracanthidae Temporal range: 419.2–307.0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Lochkovian - Moscovian
Reconstruction of Gyracanthus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	†Acanthodii
Order:	†Climatiiformes (?)
Family:	†Gyracanthidae Woodward, 1906
Genera
†Gyracanthides †Gyracanthus