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| Prioniodontida ("Complex conodonts") Temporal range:
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Conodonta |
| Clade: | †Euconodonta |
| Clade: | †Prioniodontida Dzik, 1976[1] |
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See text | |
Prioniodontida, also known as the "complex conodonts", is a large clade of conodonts that includes two major evolutionary grades; the Prioniodinina and the Ozarkodinina.[2] It includes many of the more famous conodonts, such as the giant ordovician Promissum (Prioniodinina) from the Soom Shale[3] and the Carboniferous specimens from the Granton Shrimp bed (Ozarkodinina).[4] They are euconodonts, in that their elements are composed of two layers; the crown and the basal body, and are assumed to be a clade[citation needed].
- ^ Remarks on the evolution of Ordovician conodonts. J Dzik, Acta Palaeontologica Polonica, 1976, volume 21, no 4 (pdf, retrieved 30 April 2016)
- ^ Donoghue, P.C.J.; Purnell, M.A.; Aldridge, R.J.; Zhang, S. (2008). "The interrelationships of 'complex' conodonts (Vertebrata)". Journal of Systematic Palaeontology. 6 (2): 119–153. doi:10.1017/s1477201907002234. S2CID 8005990.
- ^ Gabbott, S.E.; Aldridge, R.J.; Theron, J.N. (1995). "A giant conodont with preserved muscle tissue from the Upper Ordovician of South Africa". Nature. 374 (6525): 800. Bibcode:1995Natur.374..800G. doi:10.1038/374800a0. S2CID 4342260.
- ^ Briggs, D.E.G; Clarkson, E.N.K.; Aldridge, R.J. (1983). "The conodont animal". Lethaia. 16 (1): 1–14. doi:10.1111/j.1502-3931.1983.tb01993.x.