Macrognathus semiocellatus Roberts, 1986
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
Macrognathus semiocellatus is a species of ray-finned fish endemic to Cambodia, Laos and Vietnam; it found in marshlands and vegetated water bodies in Mekong Chao Phraya River and Mae Klong. It spends its time during the day buried in silt, sand or fine gravel and forages at night for benthic insect larvae, crustaceans and worms.
It is listed as Least Concern as it is locally and seasonally common and its threats are not significant and there is no need for conservation protection; the threats are pollution and wetland removal. It is seen aquariums and is also fished and exported from Cambodia to Thailand and other countries.
Wikipedia contributors, Macrognathus semiocellatus; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T23:06:46.472621+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Macrognathus semiocellatus Roberts, 1986
- Name authority
- Roberts, 1986
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Synbranchiformes
- Family
- Mastacembelidae
- Genus
- Macrognathus
- 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
- orderSynbranchiformes
- suborderMastacembeloidei
- familyMastacembelidae Swainson, 1839
- genusMacrognathus Lacepède, 1800
- speciesMacrognathus semiocellatus Roberts, 1986
Close classified relatives
These entries share the source’s genus, Macrognathus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Macrognathus pentophthalmos (Gronow, 1854) | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus siamensis (Günther, 1861) | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus taeniagaster (Fowler, 1935) | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus zebrinus (Blyth, 1858) | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus dorsiocellatus Britz, 2010 | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus obscurus Britz, 2010 | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus maculatus (Cuvier, 1832) | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus guentheri (Day, 1865) | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus aureus Britz, 2010 | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus pancalus Hamilton, 1822 | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus malabaricus (Jerdon, 1849) | MastacembelidaeChordata | Accepted speciesExtinction status not supplied |
| Macrognathus keithi (Herre, 1940) | MastacembelidaeChordata | 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.
- Roberts, T. R. (1986). Systematic review of the Mastacembelidae or spiny eels of Burma and Thailand, with description of two new species of Macrognathus. Japanese Journal of Ichthyology, 33 (2): 95–109. https://doi.org/10.1007/bf02905838 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:3X5B6. Classification follows source parent identifiers. English common names may vary by region.