Richardsonius

Richardsonius; Temporal range: Pliocene–present PreꞒ Ꞓ O S D C P T J K Pg N
	Redside shiner(Richardsonius balteatus)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cypriniformes
Family:	Leuciscidae
Subfamily:	Pogonichthyinae
Genus:	Richardsonius; Girard, 1856
Type species
	Cyprinus (Abramis) balteatus; Richardson, 1836

Richardsonius is a genus of freshwater ray-finned fishes belonging to the family Leuciscidae, the shiners, daces and minnows. The fishes in this genus are found in western North America. Commonly known as redside shiners, that term is also used to refer to Richardsonius balteatus specifically. The genus is named after naturalist Sir John Richardson (1787–1865), who described R. balteatus in 1836.^[2]

Species

Richardsonius contaisn the following valid species:^[3]

Richardsonius balteatus (J. Richardson, 1836) (Redside shiner)
Richardsonius egregius (Girard, 1858) (Lahontan redside)

In addition, a single fossil species †Richardsonius durranti Smith, 1975 is known from the Pliocene-aged Glenns Ferry Formation of Idaho.^[4]

References

^ ^a ^b Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Pogonichthyinae". Catalog of Fishes. California Academy of Sciences. Retrieved 20 March 2025.
^ Christopher Scharpf (6 December 2024). "Family LEUCISCIDAE Subfamily POGONICHTHYINAE (American Minnows and Shiners)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf. Retrieved 20 March 2025.
^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Richardsonius". Catalog of Fishes. California Academy of Sciences. Retrieved 20 March 2025.
^ Smith, Gerald R.; Kimmel, P. G. (1975). "Fishes of the Pliocene Glenns Ferry Formation, Southwest Idaho; Fishes of the Miocene - Pliocene Deer Butte Formation, Southeast Oregon Claude W. Hibbard Memorial Volume V". Papers on Paleontology (14): 1–87.

"Richardsonius". Integrated Taxonomic Information System. Retrieved 6 June 2006.
Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Richardsonius". FishBase. August 2011 version.

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[Cof_family-1] Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Pogonichthyinae". Catalog of Fishes. California Academy of Sciences. Retrieved 20 March 2025.

[ETYFish-2] Christopher Scharpf (6 December 2024). "Family LEUCISCIDAE Subfamily POGONICHTHYINAE (American Minnows and Shiners)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf. Retrieved 20 March 2025.

[Cofgenus-3] Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Richardsonius". Catalog of Fishes. California Academy of Sciences. Retrieved 20 March 2025.

[4] Smith, Gerald R.; Kimmel, P. G. (1975). "Fishes of the Pliocene Glenns Ferry Formation, Southwest Idaho; Fishes of the Miocene - Pliocene Deer Butte Formation, Southeast Oregon Claude W. Hibbard Memorial Volume V". Papers on Paleontology (14): 1–87.

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