Hoplias microcephalus (Agassiz, 1829)
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
Hoplias microcephalus is a species of trahiras. It is a tropical, benthopelagic freshwater fish which is known to inhabit the São Francisco River in Brazil. Males can reach a maximum length of 35.6 cm (14.0 in).
H. microcephalus was originally described by Louis Agassiz in 1829, under the genus Erythrinus. It was listed as a valid species of Hoplias by O.T. Oyakawa in 2003.
Wikipedia contributors, Hoplias microcephalus; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T22:49:45.800099+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Hoplias microcephalus (Agassiz, 1829)
- Name authority
- (Agassiz, 1829)
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Characiformes
- Family
- Erythrinidae
- Genus
- Hoplias
- 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
- familyErythrinidae Valenciennes, 1847
- genusHoplias Gill, 1903
- speciesHoplias microcephalus (Agassiz, 1829)
Close classified relatives
These entries share the source’s genus, Hoplias. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Hoplias curupira Oyakawa & Mattox, 2009 | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias macrophthalmus (Pellegrin, 1907) | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias microlepis (Günther, 1864) | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias patana (Valenciennes, 1847) | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias teres (Valenciennes, 1847) | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias aimara (Valenciennes, 1847) | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias auri Guimarães, Rosso, González-Castro, Souza, Díaz de Astarloa & Rodrigues, 2021 | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias cazumba Abreu, Pedroza, Oyakawa, Melo, Tchaicka & Piorski, 2025 | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias maranhensis Guimarães et al., 2025 | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias guri Bogan, Cardoso, Rosso & Díaz de Astarloa, 2025 | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias australis Oyakawa & Mattox, 2009 | ErythrinidaeChordata | Accepted speciesExtinction status not supplied |
| Hoplias brasiliensis (Spix & Agassiz, 1829) | ErythrinidaeChordata | 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 |
|---|---|
| Erythrinus microcephalus Agassiz, 1829 Agassiz, 1829 | 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.
- https://www.marinespecies.org/aphia.php?p=taxdetails&id=1022686 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:3MKDM. Classification follows source parent identifiers. English common names may vary by region.