| 翻訳と辞書 |
| Hyracotherium ： ウィキペディア英語版 |
Hyracotherium
''Hyracotherium'' ( ; "hyrax-like beast") is an extinct genus of very small (about 60 cm in length) perissodactyl ungulates which was found in the London Clay formation. This small, dog-sized animal was once considered to be the earliest known member of Equidae before the type species, ''H. leporinum'', was reclassified as a palaeothere, a perissodactyl family basal to both horses and brontotheres.〔Florida Museum of Natural History and the National Science Foundation: Fossil Horses In Cyberspace (''Hyracotherium'', page 1 )〕 The remaining species are now thought to belong to different genera, such as ''Eohippus'', which had previously been synonymised with ''Hyracotherium''.
==Description==
''Hyracotherium'' averaged two feet (60-cm) in length and eight to 14-inches (20-cm) high at the shoulder and weighed about 50 pounds. It had four-hoofed toes on each front foot and three-hoofed toes on each hind foot. Each toe had a pad on its underside, similar to those of a dog. It had a short face with eye sockets in the middle and a short diastema (the space between the front teeth and the cheek teeth). The skull was long, having 44 low-crowned teeth. Although it had low-crowned teeth, the beginnings of the characteristic horse-like ridges on the molars can be seen. ''Hyracotherium'' is believed to have been a browsing herbivore that ate primarily soft leaves as well as some fruits and nuts and plant shoots.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Hyracotherium」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|