The acouchis (genus Myoprocta) are rodents belonging to the family Dasyproctidae from Amazonia. They are generally smaller than the common agoutis and have very short tails (5 to 7 cm), while the common agoutis lack tails.
N（名词）
any of several South American rodents of the genus Myoprocta, closely related to the agoutis but much smaller, with a white-tipped tail: family Dasyproctidae 南美长尾刺鼠