Gyracanthides is an extinct genus of acanthodian gnathostome, known from Devonian to Early Carboniferous.
Gyracanthides is large acanthodian, G. murrayi reached the length up to . The pectoral fin spines are large compared to its body, for specimen that have estimated to be had pectoral fin spines around long. A recent study suggested that Gyracanthides is closely related to chondrichthyans (as currently delimited), and that acanthodians are paraphyletic.