Flathead flounder
Hippoglossoides dubius Schmidt, 1904
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
The flathead flounder (Hippoglossoides dubius) is a flatfish of the family Pleuronectidae. It is a demersal fish that lives on bottoms in shallow coastal waters, at depths of between 10 and 600 metres (33 and 1,969 ft). Its native habitat is the northwestern Pacific, particularly the seas of Japan and Okhotsk, and the coastlines of Kamchatka and Korea. It grows up to 45 centimetres (18 in) in length.
Wikipedia contributors, Flathead flounder; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T06:39:05.521819+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Hippoglossoides dubius Schmidt, 1904
- Name authority
- Schmidt, 1904
- Common name
- Flathead flounder
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Pleuronectiformes
- Family
- Pleuronectidae
- Genus
- Hippoglossoides
- Extinction status
- Not supplied by this source
Source habitat flags: Marine: yes · Freshwater: no · 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
- orderPleuronectiformes
- suborderPleuronectoidei
- familyPleuronectidae Rafinesque, 1815
- subfamilyPleuronectinae Rafinesque, 1815
- genusHippoglossoides Gottsche, 1835
- speciesHippoglossoides dubius Schmidt, 1904
Close classified relatives
These entries share the source’s genus, Hippoglossoides. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Bering flounderHippoglossoides robustus Gill & Townsend, 1897 | PleuronectidaeChordata | Accepted speciesExtinction status not supplied |
| American plaiceHippoglossoides platessoides (Fabricius, 1780) | PleuronectidaeChordata | 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 |
|---|---|
| Hippoglossoides elassodon dubius Schmidt, 1915 Schmidt, 1915 | synonym |
| Hippoglossoides katakurae Snyder, 1911 Snyder, 1911 | 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.
- Schmidt, P. Yu. (1904). Fishes of the eastern seas of the Russian Empire. Scientific Results of the Korea--Sakhalin Expedition of the Emperor Russian Geographical Society 1900-1901. St. Petersburg, i–xi + 1–466, Pls. 1–6. [In Russian.]. 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:3M259. Classification follows source parent identifiers. English common names may vary by region.