Oecomys sydandersoni
| Oecomys sydandersoni | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | Cricetidae |
| Genus: | Oecomys |
| Species: | O. sydandersoni |
| Binomial name | |
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Oecomys sydandersoni Carleton, Emmons, and Musser, 2009 |
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| Distribution of Oecomys sydandersoni (in red) and related species (green, Oecomys concolor; dark blue, Oecomys mamorae; light blue, Oecomys close to O. mamorae). | |
Oecomys sydandersoni is an arboreal species of rodent in the genus Oecomys. It lives in forest patches in a small area in eastern Bolivia. It is a medium-sized species, weighing about 45 g (1.6 oz), with mostly grayish and brownish fur and short and broad hindfeet with well-developed pads.
First collected in 1964, it was formally described in 2009. The species may be most closely related to O. concolor and O. mamorae, which are distributed further north and south in South America. Among other characters, the three share a particular arrangement of the arteries of the head. Virtually nothing is known of its biology.
An American Museum of Natural History expedition led by Sydney Anderson collected the first three specimens of Oecomys sydandersoni in 1964 and 1965. The material was mentioned in passing in a report on the chiggers of the region and tentatively identified as O. concolor in publications of the 1990s. During studies in the Noel Kempff Mercado National Park (NKMNP) from 1997 to 2006, Smithsonian zoologist Louise Emmons and coworkers obtained large series of Oecomys, including four species—Oecomys bicolor, Oecomys roberti, Oecomys trinitatis, and a fourth species they could not identify to species level. In 2009, Michael Carleton, Louise Emmons, and Guy Musser described the latter as a new species, Oecomys sydandersoni, referring to it the specimens collected in the 1960s and previously identified as O. concolor. They named the new species after Sydney Anderson in honor of his work on the Bolivian mammal fauna, including the first collection of O. sydandersoni.
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