Astyanax microschemos Bertaco & Lucena, 2006
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
Astyanax microschemos is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This fish is found in Brazil. It belongs to the A. scabripinnis species complex and differs from other species outside it by having a lower number of branched anal fin rays (about 14-18 vs 20-45) and its shallow body depth being about 26.9-29.7 vs more than 35% of its standard length (SL). Compared to species of its own complex, it can be distinguished by the combination of its shallow body depth (ranging from 26.9-29.7% of SL), and smaller interorbital width (26.9-30.4% of its head length). The species name comes from the Greek mikroschemos, meaning "low stature", which refers to the shallow body depth of the animal.
Wikipedia contributors, Astyanax microschemos; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T19:05:41.627604+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Astyanax microschemos Bertaco & Lucena, 2006
- Name authority
- Bertaco & Lucena, 2006
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Characiformes
- Family
- Acestrorhamphidae
- Genus
- Astyanax
- 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
- orderCharaciformes
- suborderCharacoidei
- familyAcestrorhamphidae Eigenmann, 1907
- subfamilyAcestrorhamphinae Eigenmann, 1907
- genusAstyanax Baird & Girard, 1854
- speciesAstyanax microschemos Bertaco & Lucena, 2006
Close classified relatives
These entries share the source’s genus, Astyanax. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Astyanax robustus Meek, 1912 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax pirabitira Lucena, Bertaco & Berbigier, 2013 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax superbus Myers, 1942 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax bagual Bertaco & Vigo, 2015 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax ruberrimus Eigenmann, 1913 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax trierythropterus Godoy, 1970 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax henseli de Melo & Buckup, 2006 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax procerus Lucena, Castro & Bertaco, 2013 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax poetzschkei Ahl, 1932 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax saltor Travassos, 1960 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax acatlanensis Schmitter-Soto, 2017 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Astyanax bacalarensis Schmitter-Soto, 2017 | AcestrorhamphidaeChordata | 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.
- Bertaco, V. A., & de Lucena, C. A. S. (2006). Two new species of Astyanax (Ostariophysi: Characiformes: Characidae) from eastern Brazil, with a synopsis of the Astyanax scabripinnis species complex. Neotropical Ichthyology, 4. https://doi.org/10.1590/s1679-62252006000100004 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:J5TH. Classification follows source parent identifiers. English common names may vary by region.