A family of fossil primates from the Eocene epoch of the Tertiary period of the Cenozoic Era (approximately 54 million to 37 million years ago). Unlike Plesiadapis, which is at the intersection between insectivores and primates, it has an orbital ring. It is thought to be of the same family as modern lemurs, but the incisors and canines of the lower jaw do not incline forward and are not comb-like like lemurs. Its body size ranges from that of a mouse to that of a cat. It resembles lemurs in that it has relatively small eye sockets and the tympanic ring is located inside the ear capsule. The thumbs of the front and back limbs are separated from the other fingers and open. Many have been excavated from Europe and North America. Although there are exceptions, they can be broadly divided into two subfamily: Adapinae, which are found in the former, and Notarchitectinae, which are found in the latter. Adapinae means "those who should become Apis (the sacred cow of Egypt)". [Shise Kahara] [References] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
新生代第三紀始新世(約5400万年前から3700万年前)に属する化石霊長類の1科。食虫類と霊長類の接点にあるプレシアダピスと異なり、眼窩輪(がんかりん)が形成されている。現生のキツネザルと同系のものとみられているが、下顎(かがく)の切歯、犬歯は前傾せずキツネザルのような櫛歯(しっし)になっていない。体はハツカネズミからネコの大きさまでさまざまである。眼窩が比較的小さく、鼓室輪が耳胞内にある点はキツネザルに似る。前後肢の母指は他の指から離れ、開いている。ヨーロッパと北アメリカから多数出土している。例外はあるが、前者出土のものをアダピス亜科、後者出土のものをノタルクトゥス亜科として2大別できる。アダピスとは「アピス(エジプトの聖牛)となるべきもの」の意。 [香原志勢] [参照項目] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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