The Reproductive Cycle of the Female Mountain Beaver

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Abstract
Since the mountain beaver, Aplodontia rufa, is conceded to be the most primitive living rodent, it is particularly important to know the pattern of reproduction in this species. The literature, however, contains limited information on this animal's reproduction. Asdell's review (1946) contains one brief reference to Aplodontia. Scheffer (1929) presented the fullest account of reproduction of this species, and Hubbard (1922) gave valuable reproductive data amid inaccuracies. There are excellent but limited descriptions of the anatomy of Aplodontia, including the reproductive tracts, by Tullberg (1896, 1899), and Pfeiffer (1956) has described the gross and microanatomy of the male reproductive tract, including age and seasonal fluctuations. Harvey (1956) has compared the morphogenesis of fetal membranes of Aplodontia with those of Ochotona. The purpose of this paper is to outline some of the major anatomical and physiological features of the reproductive...

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