NATURAL HISTORY · CATALOGUE RECORD
Yonenaga's Atlantic Spiny-rat
Trinomys yonenagae Rocha, 1995
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
Yonenaga's Atlantic spiny-rat (Trinomys yonenagae) or torch-tail spiny rat is a spiny rat species endemic to Brazil. Locally, it is known as rabo de facho. Named for Yatiyo Yonenaga-Yassuda, a cytogenetics researcher, it is considered an endangered species due to its highly restricted distribution and ongoing habitat loss. Genetic evidence shows that it diverged from its closest living relative, the hairy Atlantic spiny rat, around 8.5 million years ago, during the Late Miocene.
Wikipedia contributors, Yonenaga's Atlantic spiny rat; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T12:05:50.127282+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Trinomys yonenagae Rocha, 1995
- Name authority
- Rocha, 1995
- Common name
- Yonenaga's Atlantic Spiny-rat
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Rodentia
- Family
- Echimyidae
- Genus
- Trinomys
- 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
- familyEchimyidae Gray, 1825
- subfamilyEuryzygomatomyinae Fabre, Upham, Emmons, Justy, Leite, Loss, Orlando, Tilak, Patterson & Douzery, 2016
- genusTrinomys Thomas, 1921
- speciesTrinomys yonenagae Rocha, 1995
Close classified relatives
These entries share the source’s genus, Trinomys. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Elias' Atlantic Spiny-ratTrinomys eliasi (Pessôa & Reis, 1993) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Dark-caped Atlantic Spiny-ratTrinomys mirapitanga Lara, Patton & Hingst-Zaher, 2002 | EchimyidaeChordata | Accepted speciesRecorded extant |
| Rigid-spined Atlantic Spiny-ratTrinomys paratus (Moojen, 1948) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Rio de Janeiro Spiny-ratTrinomys dimidiatus (Günther, 1877) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Gracile Atlantic Spiny-ratTrinomys gratiosus (Moojen, 1948) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Moojen's Atlantic Spiny-ratTrinomys moojeni (Pessôa, Oliveira & Reis, 1992) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Elegant-spined Atlantic Spiny-ratTrinomys setosus (Desmarest, 1817) | EchimyidaeChordata | 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=825384 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:58VML. Classification follows source parent identifiers. English common names may vary by region.