Plecturocebus grovesi
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Plecturocebus grovesi |
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| Plecturocebus grovesi | ||||||||||||
| Byrne et al., 2018 |
Plecturocebus grovesi is a species of primate from the subfamily of the spring monkeys within the family of the sakia monkeys (Pitheciidae). The first description of the species was published in November 2018. The monkey's name honors the British-Australian anthropologist , primatologist and mammalogen Colin Groves , who died a year earlier.
distribution
The six type specimens examined for the first description come from the area around the town of Alta Floresta in the northern part of the Brazilian state of Mato Grosso and it is assumed that the entire distribution area between Rio Teles Pires in the east, Rio Juruena and Rio Arinos in the west and the transition to the Cerrado lies in the south. To the east of the range of Plecturocebus grovesi live the closely related species Vieira spring monkey ( Plecturocebus vieirai ) and red-bellied spring monkey ( P. moloch ), to the west of this the dark gray spring monkey ( P. cinerascens ) occurs.
features
Plecturocebus grovesi is mostly agouti- gray in color. The back is slightly darker than the sides of the body, the outside of the arms and legs, and the top of the head. The middle of the back is slightly reddish in color. The face is blackish, the cheeks are yellowish. The sides of the head, throat, chest, abdomen and the insides of the limbs are conspicuously reddish-brown in color. The hands and feet are dirty white and noticeably lighter than the outside of the limbs. The tail is blackish with a white tip.
With this coloration, Plecturocebus grovesi resembles the closely related species Prince Bernhard's spring monkey ( Plecturocebus bernhardi ), Vieira spring monkey and red-bellied spring monkey. Plecturocebus grovesi can be distinguished from the red-bellied spring monkey by the reddish-brown underside and the mostly black tail. The belly side of the red-bellied juggler monkey is more orange in color and the color of the tail is variable, blackish in some specimens, light gray in others, mixed with an agouti-brown tint. Compared to the Vieira spring monkey, Plecturocebus grovesi is slightly darker in color. The forehead of P. grovesi is blackish and the sides of the head are reddish-brown, in the Vieira prawns these regions are colored white. P. grovesi has a reddish-brown underside, in the Vieira jumper the belly and the inner sides of the limbs are yellowish to light orange. The Prince Bernhard Spring monkey is generally darker in color than P. grovesi . The dark gray jumper monkey, which also does not show the contrasting coloring of the underside and sides of the head and is almost monochrome dark gray, is even darker.
The mitochondrial and nuclear DNA ( core DNA ) of Plecturocebus grovesi also differ significantly from those of the three closely related species. By Vieira-Titi and the red-bellied titi monkeys, which together form the sister group of P. grovesi form, parted P. grovesi before about 1.3 million years ago.
Danger
Plecturocebus grovesi lives in an area that is severely affected by deforestation. The authors of the first description therefore classify the species in the IUCN category critically endangered .