Villafranca fauna - Villafranca fauna

Japanese: ビラフランカ動物群 - ビラフランカどうぶつぐん(英語表記)Villafranchian fauna
Villafranca fauna - Villafranca fauna
A general term for a group of terrestrial fossil mammals found in late Pliocene to early Pleistocene strata in central and southern to eastern Europe (up to the Sea of ​​Azov region). The name is derived from the name of the strata whose type locality is Villafranca d'Asti in northern Italy. This group represents a transitional period from warm forest-type Tertiary mammals to cold grassland-type Quaternary mammals, and compared to earlier mammal groups, the composition of the group has undergone major changes, such as the replacement of the ancient three-toed Hipparion by the one-toed horse (Equus) and the forest elephant mastodon by the grassland elephant Elephas.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
ヨーロッパ中・南部から東部(アゾフ海地域まで)の鮮新世後期から更新世前期の地層から産出する陸生化石哺乳動物群の総称。北イタリアのビラフランカ・ド・アスチを模式地とする地層名に由来する。温暖な森林型の第三紀の哺乳類から寒冷で草原型の第四紀のものへの移行過程の動物群であり,これより以前の哺乳動物群とくらべて,古い3趾のヒッパリオンが1趾のウマ(エクウス)により,森林のゾウのマストドンが草原のゾウのエレファスの仲間によって交代されるなど動物群の内容に大きな変化が見られる。

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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