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Ritchieichthys; Temporal range: Katian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Infraphylum:	Agnatha
Class:	† Pteraspidomorpha
Subclass:	† Arandaspida
Genus:	† Ritchieichthys
Species:	†R. nibili
Binomial name
	†Ritchieichthys nibili; Sansom et. al., 2013

Ritchieichthys

Last updated July 01, 2025

Ritchieichthys is an extinct genus of arandaspid that lived during the Katian stage of the Late Ordovician epoch.

Distribution

Ritchieichthys nibili is known from the Nibili Formation of the Canning Basin in Western Australia.^[1]

References

↑ Sansom, Ivan J.; Haines, Peter W.; Andreev, Plamen; Nicoll, Robert S. (25 June 2013). "A new pteraspidomorph from the Nibil Formation (Katian, Late Ordovician) of the Canning Basin, Western Australia" . Journal of Vertebrate Paleontology . 33 (4): 764–769. doi:10.1080/02724634.2013.751920. ISSN 0272-4634 . Retrieved 25 June 2025– via Taylor and Francis Online.

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[1] Sansom, Ivan J.; Haines, Peter W.; Andreev, Plamen; Nicoll, Robert S. (25 June 2013). "A new pteraspidomorph from the Nibil Formation (Katian, Late Ordovician) of the Canning Basin, Western Australia" . Journal of Vertebrate Paleontology . 33 (4): 764–769. doi:10.1080/02724634.2013.751920. ISSN 0272-4634 . Retrieved 25 June 2025– via Taylor and Francis Online.

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