Callithrix kuhlii 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Primates Callitrichidae

Scientific Name: Callithrix kuhlii Coimbra-Filho, 1985
Common Name(s):
English Wied's Marmoset, Wied's Black-tufted-ear Marmoset
Spanish Sagüi, Titi-de-orejas-negras
Taxonomic Notes: The validity and authorship of the name Callithrix kuhlii has been the subject of some debate. Hershkovitz (1975, p.142) was the first to indicate that Wied-Neuwied (1826) had referred to the marmoset of south-east Bahia as “Hapale penicillata Kuhlii” [sic]. However, Hershkovitz (1975, 1977) argued at length that kuhlii was not a valid taxon, being merely an intergrade between C. j. penicillata and C. j. geoffroyi. Vivo (1991, pp.80-81), on the other hand, argued that Wied-Neuwied (1826) had not intentionally given it this name, merely, and incorrectly, ascribing the authorship of the name penicillatato Kuhl. The first person to intentionally use the name kuhlii to describe the marmosets from south-east Bahia was Hershkovitz (1975), but his argument that it was not a valid taxonomic entity disqualifies the possibility of him being attributed authorship. This is therefore given to Coimbra-Filho (1985). A full description of the species is given in Coimbra-Filho et al. (2006).

In the past, the eastern Brazilian marmosets (penicillata É. Geoffroy, 1812, geoffroyi É. Geoffroy in Humboldt, 1812, aurita É. Geoffroy in Humboldt, 1812, and flaviceps Thomas, 1903) of the “jacchus group” were considered to be subspecies of Callithrix jacchus, following Hershkovitz (1977). All are now considered to be full species (see Coimbra-Filho 1984; Mittermeier et al. 1988; Marroig et al. 2004; Coimbra-Filho et al.. 2006).

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Rylands, A.B. & Kierullf, M.C.M.
Reviewer(s): Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)
This species is currently listed as Near Threatened as it is believed to have experienced a decline in the order of 20-25% over the past 18 years primarily as a result of habitat loss. Since it is rather adaptable to anthropogenic disturbance, declines are unlikely to be such that the species would require listing in a threatened category. Almost qualifies as threatened under criterion A2c.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Callithrix kuhlii occurs between the Rio de Contas and Rio Jequitinhonha in southern Bahia, just entering the north-easternmost tip of the state of Minas Gerais (Santos et al. 1987; Rylands et al. 1988). The western boundary is not well known, but undoubtedly defined by the inland limits of the Atlantic coastal forest. I. B. Santos (in Rylands et al. 1988) observed hybrids of C. penicillata and C. kuhlii in the region of Almenara, Minas Gerais, left bank of the Rio Jequitinhonha (16°41’S, 40°51’W). Its range is largely coincident with that of the Golden-headed Lion Tamarin Leontopithecus chrysomelas. These two callitrichids are broadly sympatric.

Surveys in 1986/1987 by Oliver and Santos (1991) demonstrated the presence of forms intermediate in appearance between C. kuhlii and C. penicillata north from the Rio de Contas, along the coast up to the regions of Valença and Nazaré, just south of the city of Salvador (Mittermeier et al. 1988). Individuals observed by Rylands near to Nazaré, just south of the city of Salvador lacked the white frontal blaze, and, although retaining the pale cheek patches typical of kuhlii, were paler grey. A photograph of the marmoset from Valença, Bahia, north of the Rio de Contas, is shown in Mittermeier et al. (1988, p.19). The variation in pelage colour of the marmosets in this region is considerable, but Coimbra-Filho et al. (1991/1992), showed that true C. kuhlii extended north through coastal Bahia into the state of Sergipe as far as the Rio São Francisco in the recent past. The present-day confusion has arisen from the widespread forest destruction, most marked and nearly total in Sergipe, and the introductions and invasions of C. jacchus and C. penicillata.
Countries occurrence:
Brazil (Bahia, Minas Gerais)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Population densities recorded from the Lemos Maia Experimental Station (CEPLAC/CEPEC), Una, Bahia were 8.70-9.09 groups/km² or 50.00-68.06 individuals/km², along three trails of 1 km, 1 km and 1.5 km (Rylands 1982).
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:An Atlantic forest species occurring in lowland and sub-montane humid forest, seasonal (mesophytic) rain forest, restinga and white sand piaçava forest. Also known to use cabruca - cacao plantations which are shaded with some native trees remaining from the original forest. They have been observed in secondary growth forest in abandoned rubber plantations. Callithix kuhlii is an adaptable species well able to live in degraded and secondary forests, depending on sufficient year round food sources and foraging sites. Near the coast, in the cocoa growing region, there is no distinct dry season with rainfall exceeding 2,000 mm a year (the heaviest rains are from March to June), but in the west of their range the forests are mesophytic with a distinct dry season, and in some areas the forests are semideciduous, with rainfall as low as 1,000 mm a year (Rylands 1989; Pinto and Rylands 1997).

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 1972; Rylands 1984). They live in extended family groups of between four and 15 individuals. Rylands (1982) observed groups sizes of 5 to 9 individuals (mean 6.56 ±1.33, n=8). 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. Rylands (1982, 1989) recorded a home range of 12 ha for a group of 5 individuals.

Rylands (1982, 1984, 1989) studied the behaviour and ecology of C. kuhliii at the Lemos Maia Experimental Station, Una, Bahia. B. Raboy and G. Canale are also studying this species in the Una Biological Reserve (Raboy and Dietz 2000; Raboy et al. 2006).

Males 482 g (n=55) (Smith and Jungers 1997).

Threats [top]

Major Threat(s): The main threat to this species is forest loss and fragmentation, most particularly in the west of their range where cattle ranches predominate and forest fragmentation is most severe. They are also hunted for pets.

Conservation Actions [top]

Conservation Actions: Occurs in the following protected areas:

Una Biological Reserve (18,500 ha)
Serra do Conduru State Park (8,941 ha)
Serra das Lontras National Park (16,800 ha)
Una Wildlife Refuge (23,000 ha)
Lemos Maia Experimental Station (CEPLAC/CEPEC) (495 ha)
Canavieiras Experimental Station (CEPLAC/CEPEC) (500 ha)

The expansion of the Una Bioloigcal Reserve is ongoing and of importance for this species as well as Cebus xanthosternos and Leontopithecus chrysomelas.

This species is listed on Appendix II of CITES.

Citation: Rylands, A.B. & Kierullf, M.C.M. 2008. Callithrix kuhlii. The IUCN Red List of Threatened Species 2008: e.T3575A9955873. . Downloaded on 22 September 2018.
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