Collins squirrel monkey
| Collins squirrel monkey | ||||||||||||
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| Scientific name | ||||||||||||
| Saimiri collinsi | ||||||||||||
| Osgood , 1916 |
The Collins squirrel monkey ( Saimiri collinsi ) is a small species of primate from the genus of the squirrel monkey within the family of the Capuchin-like (Cebidae). The distribution area of the species is in the southeastern Amazon basin south of the Amazon and includes the middle and east of the south of the Amazon part of the state of Pará including the island of Marajó in the Amazon estuary as well as the outer west of Maranhão and the northern tip of Tocantins . The distribution area is not only in the rainforest, but also includes gallery forests in the Cerrado .
features
The Collins squirrel monkey is very similar to the common squirrel monkey ( Saimiri sciureus ), but in contrast to this it has a yellowish top of the head (gray in Saimiri sciureus ). The shoulder region of the Collins squirrel monkey is orange-yellow with a greyish tinge. The back and hips are usually orange-chestnut brown with black spots, or less often pure chestnut brown (blackish to chestnut brown in contrast in the common squirrel monkey). Hands and feet, as well as wrists and ankles, are yellowish in the Collins squirrel monkey, but yellowish to reddish in the common squirrel monkey. In the males, the mean distance from right to left cheekbones in Saimiri collinsi is significantly narrower than in Saimiri sciureus , in females the width measured over the upper molars is smaller than in Saimiri sciureus .
Systematics
The species was 1,916 American US using a captured on the island of Marajó male by the zoologists Wilfred Hudson Osgood described . The species was later assigned to the common squirrel monkey as a subspecies ( S. sciureus collinsi ). In a study published in October 2014 based on the comparison of mitochondrial DNA , the species was revalidated again. The genetic distance between the two forms is between 3.4% and 4.9%, and the common squirrel monkey is more closely related to the Central American squirrel monkey ( Saimiri oerstedii ) than to the Collins squirrel monkey.
Etymology and history of research
Wilfred Hudson Osgood described the Collins squirrel monkey under the name Saimiri sciureus collinsi . The type specimen was collected by Maria Emilie Snethlage on November 15, 1911 at Fazenda Teso near Soure . The monkey's name is dedicated to Alfred Morris Collins (1876–1951), who set out on an expedition to South America with Lee Garnett Day and others.
literature
- MP Mercês, JW Lynch Alfaro, WAS Ferreira, ML Harada, J. de S. e Silva Júnior: Morphology and mitochondrial phylogenetics reveal that the Amazon River separates two eastern squirrel monkey species: Saimiri sciureus and S. collinsi. Molecular Phylogenetics and Evolution , 82, Part B, pp. 426-435, January 2015 (online from October 20, 2014) doi : 10.1016 / j.ympev.2014.09.020
- Wilfred Hudson Osgood: Mammals of the Collins-Day South American expedition . In: Chicago Field Museum of Natural History (= Zoological Series ). tape 10 , no. 16 , 1916, pp. 199–216 ( online [accessed January 21, 2015]).