Gymnocephalus baloni Holcík & Hensel, 1974
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
Balon's ruffe (Gymnocephalus baloni), also known as the Danube ruffe, is a species of freshwater ray-finned fish, a ruffe, from the family Percidae which is native to the drainages of the Danube from delta to Germany and the Dnieper from delta to Kyiv and is expected to occur in the Dniester. It inhabits areas with sand or mud substrates. It is active at night and feeds on small invertebrates. This species can reach a length of 15 centimetres (5.9 in) SL. It is named after Polish-Canadian ichthyologist Eugene K. Balon (1930–2013).
Wikipedia contributors, Balon's ruffe; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T22:40:36.947151+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Gymnocephalus baloni Holcík & Hensel, 1974
- Name authority
- Holcík & Hensel, 1974
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Perciformes
- Family
- Percidae
- Genus
- Gymnocephalus
- 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
- suborderPercoidei
- familyPercidae Rafinesque, 1815
- subfamilyPercinae Rafinesque, 1815
- genusGymnocephalus Bloch, 1793
- speciesGymnocephalus baloni Holcík & Hensel, 1974
Close classified relatives
These entries share the source’s genus, Gymnocephalus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Gymnocephalus ambriaelacus Geiger & Schliewen, 2010 | PercidaeChordata | Accepted speciesExtinction status not supplied |
| Gymnocephalus cernua (Linnaeus, 1758) | PercidaeChordata | Accepted speciesExtinction status not supplied |
| Gymnocephalus acerina (Gmelin, 1789) | PercidaeChordata | Accepted speciesExtinction status not supplied |
| striped ruffeGymnocephalus schraetser (Linnaeus, 1758) | PercidaeChordata | Accepted speciesExtinction status not supplied |
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.
- Holčík, J., & Hensel, K. (1974). A new species of Gymnocephalus (Pisces: Percidae) from the Danube, with remarks on the genus. Copeia 1974, 2. https://doi.org/10.2307/1442538 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:3HQWN. Classification follows source parent identifiers. English common names may vary by region.