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sclerotic ring : ウィキペディア英語版 | sclerotic ring
Sclerotic rings are rings of bone found in the eyes of several groups of vertebrate animals, except for mammals and crocodilians. They can be made up of single bones or multiple segments.〔(【引用サイトリンク】title=Palaeos Vertebrates: Glossary S )〕 They are believed to have a role in supporting the eye, especially in animals whose eyes are not spherical, or which live underwater.〔 Fossil sclerotic rings are known for a variety of extinct animals, including ichthyosaurs, pterosaurs, and dinosaurs, but are often not preserved. ==References==
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「sclerotic ring」の詳細全文を読む
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