NATURAL HISTORY · CATALOGUE RECORD
Rio Negro Tuco-tuco
Ctenomys rionegrensis Langguth & Abella, 1970
Source-backed taxonomic record
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 Rio Negro tuco-tuco (Ctenomys rionegrensis) is a species of rodent in the family Ctenomyidae. It is found in a small fragmented range in Entre Ríos Province in northeastern Argentina and in the Río Negro Department of western Uruguay. It is restricted to sand dunes, and is threatened by the conversion of this habitat to forestry plantations.
Wikipedia contributors, Rio Negro tuco-tuco; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T08:17:02.864247+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Ctenomys rionegrensis Langguth & Abella, 1970
- Name authority
- Langguth & Abella, 1970
- Common name
- Rio Negro Tuco-tuco
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Rodentia
- Family
- Ctenomyidae
- Genus
- Ctenomys
- Extinction status
- Recorded extant
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
- megaclassTetrapoda
- classMammalia Linnaeus, 1758
- subclassTheria Parker & Haswell, 1897
- infraclassEutheria Gill, 1872
- orderRodentia Bowdich, 1821
- suborderHystricomorpha Brandt, 1855
- infraorderHystricognathi Brandt, 1855
- familyCtenomyidae Lesson, 1842
- genusCtenomys Blainville, 1826
- speciesCtenomys rionegrensis Langguth & Abella, 1970
Close classified relatives
These entries share the source’s genus, Ctenomys. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Argentine Tuco-tucoCtenomys argentinus J. R. Contreras & Berry, 1982 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Dune Tuco-tucoCtenomys australis Rusconi, 1934 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Azara's Tuco-tucoCtenomys azarae Thomas, 1903 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Bonetto's Tuco-tucoCtenomys bonettoi J. R. Contreras & Berry, 1982 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Brazilian Tuco-tucoCtenomys brasiliensis Blainville, 1826 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Chacoan Tuco-tucoCtenomys conoveri Osgood, 1946 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Emilio's Tuco-tucoCtenomys emilianus Thomas & St. Leger, 1926 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Famatina Tuco-tucoCtenomys famosus Thomas, 1920 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Lago Blanco Tuco-tucoCtenomys fodax Thomas, 1910 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Forest Tuco-tucoCtenomys frater Thomas, 1902 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Long-tailed Tuco-tucoCtenomys fulvus Philippi, 1860 | CtenomyidaeChordata | Accepted speciesRecorded extant |
| Mottled Tuco-tucoCtenomys latro Thomas, 1918 | CtenomyidaeChordata | Accepted speciesRecorded extant |
Documented distribution
Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.
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.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=825326 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:3265X. Classification follows source parent identifiers. English common names may vary by region.