Extinct order of cartilaginous fishes
| Ischnacanthiformes | |
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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, eating animals that swim rather than plankton. They had slender builds, "light armor," deeply inserted spines, "shark-like teeth," and two dorsal fins. Some species were around 2 meters (6.56 feet) long. It was described by, Berg in 1940.
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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| Forerunners |
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| Jawless fish |
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| Jawed fish |
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