| 翻訳と辞書 |
| Gigantoproductus giganteus ： ウィキペディア英語版 |
Gigantoproductus giganteus
''Gigantoproductus giganteus'' is an extinct species of brachiopod in the family Monticuliferidae, known only from its fossil remains. It was a marine invertebrate found on the seabed in shallow seas. It probably evolved during the Devonian period and it is believed to be the largest brachiopod that has ever existed.〔
==Description==
''Gigantoproductus giganteus'' was a large brachiopod that superficially resembled a cockle. Fossils of this species have been found with widths of over . It had a pair of thick dome-shaped valves joined together by a hinge. The valves had a small number of broad ribs that radiated from a thick umbo and there were large wing-shaped ears of calcareous material on either side. The valves were held together by a central strong adductor muscle which left a scar on the inside of the valves. The ventral valve, also known as the pedicle, was covered with spines on the outside. The inside of this valve was rough, being covered by numerous cone-shaped protrusions. These are visible in an internal mould of the brachiopod, a cast fossil which has been formed when a hole in sediment left by the soft tissues of the dead organism was later infiltrated by mineral matter.
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「Gigantoproductus giganteus」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.
|
|