Gyracanthides

Gyracanthides is an extinct genus of large acanthodian fish.[1][2] They are mainly known for their long pectoral spine.[3]

Gyracanthides
Temporal range:
Restoration
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Acanthodii
Genus:
Gyracanthides

Woodward, 1906

Morphology

Gyracanthides had a body shape similar to that of modern-day sharks, with a skull anywhere from 0.22m to 1.2m long. The had and abdomen were broadly flattened dorsoventrally and were attached to a laterally compressed heterocercal caudal fin. They possessed a long, sharp pectoral spine on their ventral side, as well as a somewhat forked caudal fin.[3] They also had paired spines on their fins. Their entire body, from head to tail and including fin webs, was decorated with small rhomboid polyodontodia. These scales are thin, rhomboid in nature, and slightly concave, with a central pore.

References
  1. Warren, Anne; Currie, Bryan P.; Burrow, Carole; Turner, Susan (2000). "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.
  2. 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.
  3. "Gyracanthides - Palaeocritti - a guide to prehistoric animals". www.palaeocritti.com. Retrieved 2021-10-03.


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