Ekimis (English spelling) arboreal spiny rat

Japanese: エキミス（英語表記）arboreal spiny rat

Also known as the American spiny mouse. A general term for a mammalian species of the genus Echimys in the family Echimyidae of the order Rodentia that resembles a mouse in appearance. It is found in northern and central South America, and there are about 10 species, including the Guiana spiny mouse ( Echimys armatus ). Its body length is 17-35 cm, and its tail length 15-30 cm. Its appearance is very similar to that of the wood mouse family, but its whole body is densely covered with short, needle-like bristles. Its tail is usually bare and lacks a tuft of hair. The dorsum of its body is yellowish brown or reddish brown, and the ventral surface is light brown or white.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

アメリカトゲネズミともいう。外形がネズミに似た齧歯（げつし）目エキミス科キノボリトゲネズミ属Echimysに属する哺乳類の総称。南アメリカの北部と中部に分布し，ギアナトゲネズミ(ヨロイキノボリトゲネズミ)Echimys armatusほか約10種がある。体長17～35cm，尾長15～30cm。外形はアカネズミ類によく似るが，全身に短い針状の剛毛を密生する。尾はふつう裸出し，毛の房を欠く。体の背面は黄褐色ないし赤褐色，腹面は淡褐色または白色。

出典　株式会社平凡社世界大百科事典第２版について　情報

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