Biology:Prioniodontida

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Short description: Extinct clade of conodonts

Prioniodontida
("Complex conodonts")
Temporal range:
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Conodonta
Clade: Euconodonta
Clade: Prioniodontida
Dzik, 1976[1]
Orders

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].

Phylogeny

This is a recent cladogram of the Prioniodontida, simplified from Donoghue et al., (2008).[2]

Prioniodontida

Paracordylodus

Balognathidae

Ozarkodinida

Prioniodinina

Ozarkodinina
Polygnathacea

Palmatolepidae

Polygnathidae

Idiognathodontidae

Bactrognathidae[Note 1]

Notes

  1. Bactrognathidae is actually only one of two families (the other unnamed) belonging to a superfamily that is as yet unnamed.

References

  1. Remarks on the evolution of Ordovician conodonts. J Dzik, Acta Palaeontologica Polonica, 1976, volume 21, no 4 (pdf, retrieved 30 April 2016)
  2. 2.0 2.1 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. 
  3. 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. doi:10.1038/374800a0. Bibcode1995Natur.374..800G. 
  4. 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. 

Wikidata ☰ Q6581502 entry