Biology:Gyrodus

From HandWiki

Gyrodus (from Greek: γύρος gyros, 'curved' and Greek: ὀδούς odoús 'tooth')[1] is an extinct genus of pycnodontiform ray-finned fish that lived from the Middle Jurassic (Bajocian) to the Early Cretaceous (Barremian).[2]

Palaeobiology

Dental microwear indicates that Gyrodus planidens closed its jaw in a propalinal motion with the prearticular shearing against the vomer during the powerstroke rather than through purely vertical jaw movement.[3]

References

  1. Roberts, George (1839) (in English). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 74. https://archive.org/details/anetymologicala00robegoog. Retrieved 30 December 2021. 
  2. Kriwet, Jürgen; Schmitz, Lars (2005). "New insight into the distribution and palaeobiology of the pycnodont fish Gyrodus". Acta Palaeontologica Polonica 50 (1): 49–56. https://www.app.pan.pl/article/item/app50-049.html. 
  3. Baines, David Christian (31 October 2010). Tooth Microwear in Fishes (PhD thesis). University of Leicester. Retrieved 18 March 2026.

Further reading

  • Fossils (Smithsonian Handbooks) by David Ward

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