NATURAL HISTORY · CATALOGUE RECORD
Lesson's Saddle-back Tamarin
Leontocebus fuscus (Lesson, 1840)
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
Lesson's saddle-back tamarin (Leontocebus fuscus) is a species of saddle-back tamarin, a type of small monkey from South America. Lesson's saddle-back tamarin was formerly considered to be a subspecies of the brown-mantled tamarin, L. fuscicollis. Genetic analysis showed it to be more closely related to the black-mantled tamarin than to the brown-mantled tamarin. Its type locality is in Colombia, in Plaines de Mocoa,
Putumayo, between the Rio Putumayo and Rio Caqueta. It also lives in Brazil.
Lesson's saddle-back tamarin has a head and body length of between 212 millimetres (8.3 in) and 234 millimetres (9.2 in). Males have tails between 296 millimetres (11.7 in) and 383 millimetres (15.1 in) long, and females have tales between 337 millimetres (13.3 in) and 362 millimetres (14.3 in) long. It weighs between 350 grams (12 oz) and 400 grams (14 oz).
It sometimes associates with Goeldi's marmoset. The IUCN rates it as least concern from a conservation standpoint.
Wikipedia contributors, Lesson's saddle-back tamarin; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T12:02:53.863457+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Leontocebus fuscus (Lesson, 1840)
- Name authority
- (Lesson, 1840)
- Common name
- Lesson's Saddle-back Tamarin
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Primates
- Family
- Callitrichidae
- Genus
- Leontocebus
- 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
- orderPrimates Linnaeus, 1758
- suborderHaplorrhini Pocock, 1918
- infraorderSimiiformes Haeckel, 1866
- familyCallitrichidae Gray, 1821
- genusLeontocebus Wagner, 1840
- speciesLeontocebus fuscus (Lesson, 1840)
Close classified relatives
These entries share the source’s genus, Leontocebus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Red-mantled Saddle-back TamarinLeontocebus lagonotus (Jiménez de la Espada, 1870) | CallitrichidaeChordata | Accepted speciesRecorded extant |
| Andean Saddle-back TamarinLeontocebus leucogenys (Gray, 1866) | CallitrichidaeChordata | Accepted speciesRecorded extant |
| Black-mantled TamarinLeontocebus nigricollis (Spix, 1823) | CallitrichidaeChordata | Accepted speciesRecorded extant |
| Cruz Lima's Saddle-back TamarinLeontocebus cruzlimai (Hershkovitz, 1966) | CallitrichidaeChordata | Accepted speciesRecorded extant |
| Brown-mantled TamarinLeontocebus fuscicollis (Spix, 1823) | CallitrichidaeChordata | Accepted speciesRecorded extant |
| Geoffroy's Saddle-back TamarinLeontocebus nigrifrons (I. Geoffroy Saint-Hilaire, 1850) | CallitrichidaeChordata | Accepted speciesRecorded extant |
| Golden-mantled Saddle-back TamarinLeontocebus tripartitus (A. Milne-Edwards, 1878) | CallitrichidaeChordata | Accepted speciesRecorded extant |
| Weddell's Saddle-back TamarinLeontocebus weddelli (Deville, 1849) | CallitrichidaeChordata | Accepted speciesRecorded extant |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Simia leonina Humboldt, 1805 Humboldt, 1805 | synonym |
| Leontopithecus fuscus Lesson, 1840 Lesson, 1840 | synonym |
| Saguinus fuscus (Lesson, 1840) (Lesson, 1840) | synonym |
| Saguinus fuscicollis fuscus (Lesson, 1840) (Lesson, 1840) | synonym |
| Leontocebus fuscicollis fuscus (Lesson, 1840) (Lesson, 1840) | synonym |
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=1025093 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:3T6RC. Classification follows source parent identifiers. English common names may vary by region.