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Acetabularia caliculus : ウィキペディア英語版 | Acetabularia caliculus
''Acetabularia caliculus'' is a species of green alga found in shallow temperate and tropical seas. ==Description== The umbrella alga grows singly or in clusters. Each individual thallus consists of a single cell with a single nucleus.〔 There is a holdfast where the alga is attached to the substrate and a long, slender, calcified stipe or stalk. The thallus is emerald green and cup-shaped, or occasionally flattened, with twenty two to thirty rays. The stipe is up to long and the disc up to in diameter. In immature specimens, the stipe has a complex structure of short branches but by the time the alga reaches maturity, only the scars of these remain.
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「Acetabularia caliculus」の詳細全文を読む
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