| 翻訳と辞書 |
| alalcomenaeus ： ウィキペディア英語版 |
alalcomenaeus
''Alalcomenaeus'' is one of the most widespread and longest surviving arthropod genera of the Early and Middle Cambrian.〔 Known from over 300 specimens in the Burgess shale, and the Chengjiang, it bears great similarity to the opabiniids.
==Morphology==
''Alalcomenaeus'' had three median eyes; two stalked, more lateral eyes; a triflagellate great appendage; and two more head appendages posterior to that. Like its body appendages, these were biramous — their inner branch was spiny, segmented, flexible and leg-like, while the outer portion had a large surface area and resembled a flap.
''Alalcomenaeus'' reached about 6 cm in length, although many smaller specimens are known.〔 Its head was covered with a shield, and its eleven body segments were also covered with an exoskeleton. Its body terminated with a paddle-like telson ("tail") which probably helped to propel the organism; this ended with long flat spikes in the plane of the tail fin.
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「alalcomenaeus」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.
|
|