A nail is a protective plate characteristically found at the tip of the digits (fingers and toes) of almost all primates (except for marmosets), corresponding to the claws in other tetrapod animals. Fingernails and toenails are made of a tough rigid protein called alpha-keratin, a polymer also found in the claws, hooves, and horns of vertebrates.
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In this Dossier
Marmoset in the context of Polyandry in animals
In behavioral ecology, polyandry is a class of mating system where one female mates with several males in a breeding season. Polyandry is often compared to the polygyny system based on the cost and benefits incurred by members of each sex. Polygyny is where one male mates with several females in a breeding season (e.g., lions, deer, some primates, and many systems where there is an alpha male).A common example of polyandrous mating can be found in the field cricket (Gryllus bimaculatus) of the insect order Orthoptera (containing crickets, grasshoppers, and groundhoppers). Polyandrous behavior is also prominent in many other insect species, including honeybees, the red flour beetle, the adzuki bean weevil, and the species of spider Stegodyphus lineatus. Polyandry also occurs in some mammals including primates such as marmosets and the marsupial genera Antechinus and bandicoots, and in around 1% of all bird species, such as jacanas and dunnocks, and infish such as pipefish.
Marmoset in the context of Tijuca Forest
The Tijuca National Park (Portuguese: Parque Nacional da Tijuca) is an urban national park in the mountains of the city of Rio de Janeiro, Brazil. The park is part of the Atlantic Forest Biosphere Preserve, and is administered by the Chico Mendes Institute for Biodiversity Conservation (ICMBio).
The area is composed of secondary vegetation, as it is the result of reforestation carried out during the Second Empire, when it became clear that deforestation caused by coffee farms was harming the drinking water supply of the then capital of the Empire. More than 230 species of animals and birds live in the park, including capuchin monkeys, coatis, agoutis, wild dogs, marmosets, hummingbirds and thrushes.
Marmoset in the context of Callitrichidae
The Callitrichidae (also called Arctopitheci or Hapalidae) are a family of New World monkeys, including marmosets, tamarins, and lion tamarins. At times, this group of animals has been regarded as a subfamily, called the Callitrichinae, of the family Cebidae.
This taxon was traditionally thought to be a primitive lineage, from which all the larger-bodied platyrrhines evolved. However, some works argue that callitrichids are actually a dwarfed lineage.