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Hairy Atlantic spiny rat
Species of rodent From Wikipedia, the free encyclopedia
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The hairy Atlantic spiny rat (Trinomys setosus) is a spiny rat species from South America.[2]
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Taxonomy
Anselme Gaëtan Desmarest described it in 1817 as Proechimys setosus. It was moved to Trinomys by Lara and Patton in 2000.[1]
Description
It is a medium-large rat, with a head and body length averaging 204 millimetres (8.0 in) and a 209 millimetres (8.2 in) tail. The fur on the back is "brownish-olive to cinnamon", gradually paling to white on the stomach. The tail has a brown base and white tip, with a tuft of hair at the end.[3]
They have 56 pairs of chromosomes.[4] A 2022 genetic analysis found that within Trinomys, T. setosus is most closely related to T. yonengae, and they may have separated approximately 8 million years ago.[5]
The species is endemic to Brazil, and can be found in Sergipe, Bahia, Minas Gerais, Espírito Santo, and Rio de Janeiro.[3] Its habitat includes forest and savanna.[1] It is likely nocturnal.[6]
The IUCN list T. setosus as a species of least concern due to its wide distribution and local abundance.[1]
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References
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