Ischnacanthiformes

Ischnacanthiformes Temporal range: 418–409 Ma PreЄ Є O S D C P T J K Pg N
Ishnacanthus gracilis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Infraphylum:	Gnathostomata
Class:	Acanthodii (J. A. Long 2011)
Order:	Ischnacanthiformes
Families
Ischnacanthidae Poracanthidae Xylacanthus

Ischanacanthiformes is an order of Acanthodii or spiny sharks found in Ukraine and United Kingdom. Members of this order were nektonic carnivores, eating animals that swim rather than plankton. They had slender builds, light armor, deeply inserted spines, and two dorsal fins. It was described by Berg in 1940.