Hemigrammus ulreyi (Boulenger, 1895)
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
Hemigrammus ulreyi, commonly known as Ulrey's tetra, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This species is named in honor of the biologist Albert B. Ulrey. It was originally named Tetragonopterus ulreyi in 1895. This species is found in the basins of the Paraguay River and the middle Paraná River in Argentina, Brazil and Bolivia.
Wikipedia contributors, Hemigrammus ulreyi; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T22:46:33.673477+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Hemigrammus ulreyi (Boulenger, 1895)
- Name authority
- (Boulenger, 1895)
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Characiformes
- Family
- Acestrorhamphidae
- Genus
- Hemigrammus
- 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
- subfamilyPristellinae Géry & Boutière, 1964
- genusHemigrammus Gill, 1858
- speciesHemigrammus ulreyi (Boulenger, 1895)
Close classified relatives
These entries share the source’s genus, Hemigrammus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Hemigrammus barrigonae Eigenmann & Henn, 1914 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus coeruleus Durbin, 1908 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus cylindricus Durbin, 1909 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus diagonicus Mendonça & Wosiacki, 2011 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus durbinae Ota, Lima & Pavanelli, 2015 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus gracilis (Lütken, 1875) | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus haraldi Géry, 1961 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus levis Durbin, 1908 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus luelingi Géry, 1964 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus mahnerti Uj & Géry, 1989 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus matei Eigenmann, 1918 | AcestrorhamphidaeChordata | Accepted speciesExtinction status not supplied |
| Hemigrammus melanochrous Fowler, 1913 | AcestrorhamphidaeChordata | 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 |
|---|---|
| Tetragonopterus ulreyi Boulenger, 1895 Boulenger, 1895 | 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=1467905 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:3KP2J. Classification follows source parent identifiers. English common names may vary by region.