Mico humeralifer 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Primates Callitrichidae

Scientific Name: Mico humeralifer
Species Authority: (É. Geoffroy in Humboldt, 1812)
Common Name(s):
English Black And White Tassel-ear Marmoset, Tassel-eared Marmoset
Taxonomic Notes: Formerly in the genus Callithrix (see Rylands et al 1993, 2000, 2008). Groves (2001, 2005) lists this species as Callithrix (Mico) humeralifera.

A pale orange-brown marmoset very similar to M. humeralifer obtained from the Rio Arapiuns in the northern part of the range was photographed by Mittermeier et al. (1988, p.20) in the collection of the Belém Primate Centre. It is believed that this was a chromogenic anomaly.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Rylands, A.B. & Silva Jr., J.S.
Reviewer(s): Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)
Listed as Data Deficient as there is no information on the precise limits of the distribution range of this species, its population status, or threats.
Previously published Red List assessments:
2003 Least Concern (LC)
1996 Lower Risk/least concern (LR/lc)
1988 Vulnerable (V)
1986 Vulnerable (V)
1982 Vulnerable (V)

Geographic Range [top]

Range Description: Field research since the publications of Hershkovitz (1977) and Rylands et al. (1993) has diminished the supposed distribution of the Santarém marmoset. Hershkovitz’s (1977) range is now divided into four, being occupied by marmosets now considered distinct species: M. mauesi, M. saterei and M. acariensis besides M. humeralifer. According to our current understanding, M. humeralifer occurs south of the Rio Amazonas, between the Rio Maués (and possibly its tributary the Rio Parauari) in the west, and the Rio Tapajós in the east. The southern limit is not known, but may be in the region of the Rio Paracari. The southernmost locality for the Santarém marmoset plotted by Hershkovitz (1977) was Vila Braga, 4º25'S, on the Transamazon highway, just north of the Amazonia National Park.
Countries occurrence:
Brazil (Amazonas, Pará)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is no information avaiable on the population status of this species.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: An inhabitant of Amazonian lowland rain forest.

Marmosets and tamarins are distinguished from the other monkeys of the New World by their small size, modified claws rather than nails on all digits except the big toe, the presence of two as opposed to three molar teeth in either side of each jaw, and by the occurrence of twin births. They eat fruits, flowers, nectar, plant exudates (gums, saps, latex) and animal prey (including frogs, snails, lizards, spiders and insects). Marmosets have morphological and behavioural adaptations for gouging trees trunks, branches and vines of certain species to stimulate the flow of gum, which they eat, and in some species form a notable component of the diet (Coimbra-Filho and Mittermeier 1976; Rylands 1984). They live in extended family groups of between four and 15 individuals. Generally, only one female per group breeds during a particular breeding season. The groups defend home ranges 10-40 ha, the size depending on availability and distribution of foods and second-growth patches.

Males 475 g (n=15) (Smith and Jungers 1997)
H&B 20.0-27.0 cm, TL 31.0-37.0 cm (n=10) (Ferrari 2008).
Systems: Terrestrial

Threats [top]

Major Threat(s): There is no information on major threats to this species. However, it may be vulnerable because of its proximity to a number of expanding urban centres, as well as the mainstream of the Rio Amazonas, and the resulting forest destruction (Coimbra-Filho 1984). Its distribution is also cut by the Transamazônica highway (BR-230). It is probably not hunted, but there may be some use as pets.

Conservation Actions [top]

Conservation Actions: It occurs in the Amazônia National Park (994 000 ha), Pará, where population surveys were carried out by Ayres and Milton (1981) and Branch (1983).
It is listed on Appendix II of CITES (as Callithrix humeralifera).

Citation: Rylands, A.B. & Silva Jr., J.S. 2008. Mico humeralifer. The IUCN Red List of Threatened Species 2008: e.T41521A10488246. . Downloaded on 27 November 2015.
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