Cottus is a
genus of the mainly freshwater
ray-finned fishes belonging to the
familyCottidae, the typical sculpins. They are often referred to as the "freshwater sculpins", as they are the principal genus of
sculpins to be found in fresh water. They are native to the
Palearctic and
Nearctic.[1]
They are small fish, mostly less than 15 cm (6 in) in length, although a few species can reach twice that size.[1]
Taxonomy
Cottus was first proposed as a genus by
Carl Linnaeus in the 10th edition of the Systema Naturae when he described the
European bullhead (Cottus gobio) and in 1850 this species was designated as the type species of the genus by the French
ichthyologist Charles Frédéric Girard.[2] The 5th edition of the Fishes of the World classifies this genus within the
subfamilyCottinae of the family Cottidae.[3] Other authorities have found that the Cottidae, as delimited in the 5th edition of Fishes of the World, is
paraphyletic and that the
monophyletic grouping is the freshwater sculpins, including the
Baikal sculpins, while most of the marine taxa are classified within the family
Psychrolutidae.
[4]Cottus kazika has been found to be outside of a monophyletic Cottus and has been classified in the
monospecific genusRheopresbe.[5]
Species
There are currently around 70 recognized species in this genus:[1][6]
Cottus is derived from the
Greekkottos, and is a
latinisation that word, the original form of it being koviós or kóthos. This is likely to mean "head" and is the word for a small fish with a large head, and is now used for sculpins.[15]
^W. Leo Smith & Morgan S. Busby (2014). "Phylogeny and taxonomy of sculpins, sandfishes, and snailfishes (Perciformes: Cottoidei) with comments on the phylogenetic significance of their early-life-history specializations". Molecular Phylogenetics and Evolution. 79: 332–352.
doi:
10.1016/j.ympev.2014.06.028.
PMID25014569.
^Kinziger, A. P.; R. M. Wood; and D. A. Neely (2005). "Molecular systematics of the genus Cottus (Scorpaeniformes: Cottidae)". Copeia. 2005 (2): 303–311.
doi:
10.1643/CI-03-290R1.
S2CID86171840.
^Sideleva, V.G.; Naseka, A.M. & Zhidkov, Z.V. (2015). "A new species of Cottus from the Onega River drainage, White Sea basin (Actinopterygii: Scorpaeniformes: Cottidae)". Zootaxa. 3949 (3): 419–430.
doi:
10.11646/zootaxa.3949.3.7.
PMID25947816.
^Sideleva, V.G.; Prirodina, V.P.; Reshetnikov, Y.S. & Zhidkov, Z.V. (2015). "Redescription of Cottus koshewnikowi (Cottidae) and its Morphological Variability in Tributaries of the Upper Volga". Journal of Ichthyology. 55 (1): 30–39.
doi:
10.1134/S0032945215010191.
S2CID255274919.
^Adams, G.L.; Burr, B.M.; Day, J.L. & Starkey, D.E. (2013). "Cottus specus, a new troglomorphic species of sculpin (Cottidae) from southeastern Missouri". Zootaxa. 3609 (5): 484–494.
doi:
10.11646/zootaxa.3609.5.4.
PMID24699612.
^Sideleva, V.G. & Goto, A. (2012): A New Species of Sculpin Cottus kolymensis sp. nova (Scorpaeniformes, Cottidae) from Rivers of Kolyma. Journal of Ichthyology, 52 (5): 301-307.
^Lemoine, M.; Young, M.K.; McKelvey, K.S.; et al. (2014). "Cottus schitsuumsh, a new species of sculpin (Scorpaeniformes: Cottidae) in the Columbia River basin, Idaho-Montana, USA". Zootaxa. 3755 (3): 241–258.
doi:
10.11646/zootaxa.3755.3.3.
PMID24869819.