Cottus koshewnikowi Gratzianov, 1907
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
Cottus koshewnikowi, Koshewnikow's sculpin, is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins. It inhabits the upper Volga drainage in Russia and drainages of the northern and eastern Baltic Sea from Estonia eastward and northward to Finland and northern Sweden.
In coastal waters of the Northern Baltic Sea it forms hybrid populations with the more western bullhead species Cottus gobio (sensu stricto).
It reaches a maximum length of 10 cm (3.9 in). It prefers medium-sized rivers to small streams, and lake shores.
Wikipedia contributors, Cottus koshewnikowi; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T19:25:36.205210+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Cottus koshewnikowi Gratzianov, 1907
- Name authority
- Gratzianov, 1907
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Perciformes
- Family
- Cottidae
- Genus
- Cottus
- Extinction status
- Not supplied by this source
Source habitat flags: Marine: no · Freshwater: yes · Terrestrial: no. These do not form a complete habitat description.
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- gigaclassActinopterygii
- superclassActinopteri
- classTeleostei
- orderPerciformes
- suborderCottoidei
- familyCottidae Bonaparte, 1831
- genusCottus Linnaeus, 1758
- speciesCottus koshewnikowi Gratzianov, 1907
Close classified relatives
These entries share the source’s genus, Cottus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Cottus pollux Günther, 1873 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| shorthead sculpinCottus confusus Bailey & Bond, 1963 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| Cottus chattahoochee Neely, Williams & Mayden, 2007 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| Cottus ohmiensis Watanabe, 1960 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| coastrange sculpinCottus aleuticus Gilbert, 1896 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| prickly sculpinCottus asper Richardson, 1836 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| Cottus baileyi Robins, 1961 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| mottled sculpinCottus bairdii Girard, 1850 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| Cottus beldingii Eigenmann & Eigenmann, 1891 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| Cottus bendirei (Bean, 1881) | CottidaeChordata | Accepted speciesExtinction status not supplied |
| Cottus czerskii Berg, 1913 | CottidaeChordata | Accepted speciesExtinction status not supplied |
| Cottus dzungaricus Kottelat, 2006 | CottidaeChordata | Accepted speciesExtinction status not supplied |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Cottus gobio microcephalus Kessler, 1868 Kessler, 1868 | synonym |
| Cottus gobio milviensis Soldatov, 1924 Soldatov, 1924 | synonym |
| Cottus gobio milvensis Soldatov, 1924 Soldatov, 1924 | synonym |
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- Gratzianov, V. I. (1907). Übersicht der Süßwassercottiden des russischen Reiches. Zoologischer Anzeiger, v. 31 (no. 21/22): 654–660. [In German. Author also seen as Gratzianow.]. Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:YYJ9. Classification follows source parent identifiers. English common names may vary by region.