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Presbytis is a genus of Old World monkeys also known as langurs, leaf monkeys, or surilis. Members of the genus live in the Thai-Malay Peninsula , on Sumatra , Borneo , Java and smaller nearby islands.
Like all Old World monkeys, the Barbary macaque has well-developed sitting pads (ischial callosities) on its rear. [19] Females exhibit an exaggerated anogenital swelling, [20] [21] which increases in size during oestrus. [22] [23] It has cheek pouches and high-crowned bilophodont molars (molars with two ridges); the third molar is elongated. [19]
Certain species under the genus Macaca have become invasive in certain parts of the world, while others that survive in forest habitats remain threatened. The long-tailed macaque (M. fascicularis) is listed as a threat and invasive alien species in Mauritius, along with the rhesus macaques (M. mulatta) in Florida. [15]
The Javan surili (Presbytis comata) is a vulnerable species of Old World monkey endemic to the western half of Java, Indonesia, a biodiversity hotspot.Other common names by which it is known by include gray, grizzled or Sunda Island surili; grizzled or stripe-crested langur; Javan grizzled langur; grizzled, Java or Javan leaf monkey; langur gris.
The proboscis monkey or long-nosed monkey (Nasalis larvatus) is an arboreal Old World monkey with an unusually large nose (or proboscis), a reddish-brown skin color and a long tail. It is endemic to the southeast Asian island of Borneo and is found mostly in mangrove forests and on the coastal areas of the island.
Miller's langur (Presbytis canicrus), also known as Miller's grizzled langur or Kutai grey langur, is a species of leaf monkey. It is endemic to East Kalimantan on the island of Borneo in Indonesia. It is one of the world's most endangered primates, and was at one time thought to be extinct, until it was rediscovered in 2012.
Usually, howler monkeys have a single dominant male, with multiple adult females and babies in smaller groups. [13] In larger groups, the howler monkeys' group composition can vary. [ 13 ] In a 2009 study by Lucas M. Aguiar, Gabriela Ludwig, and Fernando C. Passos, in the Upper Paraná River of southern Brazil, the black and gold howler groups ...
Of the three monkey species to have had any lasting presence in Florida, the other two being African vervet monkeys and South American squirrel monkeys, the Rhesus macaques have endured the longest and are the only ones to show continual population growth. The species' adaptable nature, generalized diet, and larger size as to reduce the chance ...