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Speciation in the Brazilian Spiny Rats
The spiny-rats included in the genus Proechimys are common in almost every forest of South America above the Tropic of Capricorn, and in Central America northward to approximately 12 N, in Nicaragua. In size and proportions they are similar to the brown rat Rattus norvegicus but actually they belong to a very different suborder of rodentsthe Hystricomorpha. The hystricomorphs are represented in South America by a large variety of animals, of which capybaras, agoutis and cavies are common representatives. The pelage of the spiny-rats has a large number of flattened, spinelike hairs, especially on the back. The color ranges through different tints and shades of reddish-brown more or less evenly distributed on the upper parts; the underparts are usually pure white, sharply contrasting with the brown color above. The tail is bicolored, brown above and white below. The spiny-rats live in forests of different types, generally in the proximity of water. Shelter is usually procured under boulders, stumps or masses of roots. The reproductive rate is low; on the average, there are only two young per litter and only two litters per year. ......Buy Now (To Read More)
Ebook Number: 42720
Author: Moojen, João
Release Date: May 16, 2013
Format: eBook
Language: English
Editor: Hall, E. Raymond (Eugene Raymond), 1902-1986
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