Ischnacanthiformes is a prehistoric order of "acanthodian" stem-chondrichthyans 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]
| Ischnacanthiformes Temporal range:
| |
|---|---|
| |
| Nerepisacanthus | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Acanthodii |
| Order: | †Ischnacanthiformes |
| Families | |
References
edit- ^ a b 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. Archived from the original on 12 October 2022. 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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