Laviniinae is a

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zo ...

of freshwater ray-finned fishes belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Leuciscidae Leuciscidae is a family of freshwater ray-finned fishes, formerly classified as a subfamily of the Cyprinidae, which contains the true minnows. Members of the Old World (OW) clade of minnows within this subfamily are known as European minnow ...

, the family which includes the daces, chubs, Eurasian minnows and related fishes. Members of this subfamily are known as western chubs or the western clade (WC) of minnows. As the name suggests, most members of this clade are found in western

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

aside from '' Chrosomus'', which is found in eastern North America. One of the largest North American cypriniforms and the largest member of Leuciscidae, the Colorado pikeminnow (''Ptychocheilus lucius''), belongs to this subfamily. Fossil remains of a large minnow presumably related to '' Ptychocheilus'' have been recovered from the

Late Eocene The Priabonian is, in the International Commission on Stratigraphy, ICS's geologic timescale, the latest age (geology), age or the upper stage (stratigraphy), stage of the Eocene epoch (geology), Epoch or series (stratigraphy), Series. It spans ...

Early Oligocene The Rupelian is, in the geologic timescale, the older of two age (geology), ages or the lower of two stage (stratigraphy), stages of the Oligocene epoch (geology), Epoch/series (stratigraphy), Series. It spans the time between . It is preceded b ...

-aged deposits of the Cypress Hills Formation in

Saskatchewan Saskatchewan is a Provinces and territories of Canada, province in Western Canada. It is bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and to the south by the ...

Genera

Laviniinae contains the following genera: * '' Chrosomus'' Rafinesque, 1820 (redbelly daces) * '' Eremichthys'' Hubbs & R. R. Miller, 1948 (desert dace) *'' Evarra'' Woolman, 1894 (Mexican daces) * '' Gila'' Baird & Girard, 1853 (western chubs) * '' Hesperoleucus'' Snyder, 1913 (California roach) * '' Lavinia'' Girard, 1854 (Hitch) * '' Mylopharodon'' Ayres, 1855 (hardheads) * '' Orthodon'' Girard, 1856 (Sacramento blackfish) * '' Ptychocheilus'' Agassiz, 1855 (pikeminnows) * '' Relictus'' Hubbs & R. R. Miller, 1972 (relict dace) * '' Siphateles'' Cope, 1883

References

{{Taxonbar, from=Q100144507 Leuciscidae Fish subfamilies * Taxa named by Pieter Bleeker