Ischnacanthiformes

Ischnacanthiformes; Temporal range: 418–409 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Ischnacanthus gracilis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Acanthodii (J. A. Long 2011)
Order:	Ischnacanthiformes
Families
	Ischnacanthidae; Poracanthidae; Xylacanthus;

Ischanacanthiformes is an order of Acanthodii or spiny sharks found in Canada, Ukraine and United Kingdom. Members of this order were nektonic carnivores,[1] eating animals that swim rather than plankton. They had slender builds, light armor, deeply inserted spines, shark-like teeth, and two dorsal fins.[1] Some species were around 2 meters (6.56 feet) long.[2] It was described by Berg in 1940.[3][4]

References

McGraw-Hill Dictionary of Scientific & Technical Terms (6 ed.). McGraw-Hill Companies, Inc. 2003.
"Palaeos Vertebrates Acanthodii: Teleostomi". palaeos.com. Retrieved 2018-09-30.
"†order Ischnacanthiformes Berg 1940 (spiny fish)". Fossilworks. Retrieved 11 January 2014.
Burrow, Carole. Acanthodians with dentigerous jaws: the Ischnacanthiformes and Acanthodopsis. Department of Zoology and Entomology, University of Queensland.

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[McGraw-Hill-1] McGraw-Hill Dictionary of Scientific & Technical Terms (6 ed.). McGraw-Hill Companies, Inc. 2003.

[2] "Palaeos Vertebrates Acanthodii: Teleostomi". palaeos.com. Retrieved 2018-09-30.

[fosworks-3] "†order Ischnacanthiformes Berg 1940 (spiny fish)". Fossilworks. Retrieved 11 January 2014.

[burrow-4] Burrow, Carole. Acanthodians with dentigerous jaws: the Ischnacanthiformes and Acanthodopsis. Department of Zoology and Entomology, University of Queensland.