American Mastodon

Japanese: アメリカマストドン - あめりかますとどん
American Mastodon

...In the latter two genera, the lower tusks are modified into shovel-like shapes. The Mammutidae (Mammut or American Mastodon , Zygolophodon ), widespread in the Miocene and Pleistocene, are often considered to be in the same family as the preceding family, but the papillae on their molars form a transverse row. The Elephantidae ( Stegodon , Mammuthus , and modern elephants), which appeared in the Miocene, lack lower tusks, have high molar crowns, and have numerous transverse ridges on the biting surface, making them suitable for eating grass and other hard plants.

From Mastodon

...The Mammutidae family consists of two main genera: Zygolophodon , which was distributed in Eurasia from the Miocene to the early Pleistocene, and Mammut ( Mastodon ), which flourished in North America from the Pliocene to the present day. The American Mastodon, Mammut americanus , is tall at the shoulder, 2.7 to 3 meters, has a low and long head, has 2 to 3 meter long tusks on the upper jaw, and is covered with long brown hair up to 30 cm long. It lived in lowland open forest areas with many coniferous trees. It became extinct in North America between 9,000 and 12,000 years ago, but its relationship with human remains is unknown. ...

*Some of the terminology that mentions the "American mastodon" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…後の2属では下のきばがシャベル状に変形している。中新世~更新世に広く分布したマンムト科(マンムトまたはアメリカマストドンMammut,ジゴロフォドンZygolophodon)は前科に似てしばしば同科とされるが臼歯の乳頭状突起が横列を形成する。中新世に現れたゾウ科(ステゴドンStegodon,マンモスMammuthus,現生のゾウ)は下のきばを欠き,臼歯の歯冠部が高く,咬面に多数の横畝があり,草その他の硬い植物を食べるのに適する。…

【マストドン】より

…マンムト科には中新世から更新世初期にユーラシア大陸に分布したジゴロフォドンZygolophodonと,鮮新世から現世にかけて北アメリカ大陸で繁栄したマンムトMammut(マストドンMastodon)の2属がおもなものとしてある。アメリカマストドンMammut americanusは肩の高さ2.7~3mと高く,頭は低くて長く,上顎に2~3mの長いきばをもち,体は30cmもある長い褐色の毛でおおわれ,低地の開けた針葉樹の多い森林地帯で生活していた。北アメリカでは9000年から1万2000年前の間に絶滅しているが,人類遺跡との関係は不明である。…

※「アメリカマストドン」について言及している用語解説の一部を掲載しています。

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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