| Ischnacanthiformes Temporal range:
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| Nerepisacanthus | |
Scientific classification
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | † Acanthodii |
| Order: | † Ischnacanthiformes |
| Families | |
Ischanacanthiformes 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]
References
- ^ 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. 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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Jawless fish |
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| Jawed fish |
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† extinct | |||||||||||||
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