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Carcinus aestuarii : ウィキペディア英語版 | Carcinus aestuarii
''Carcinus aestuarii'' is a littoral crab, native to the Mediterranean Sea. ''Carcinus aestuarii'' bears some similarities to ''Carcinus maenas'' and was sometimes considered to be a subspecies thereof, rather than a species in its own right, but a molecular biological study using the COI gene found the difference between the two taxa to be substantial, supporting their status as separate species. The two taxa can be visually distinguished by the front of the carapace, between the eyes, which is short and toothed in ''C. maenas'' but longer and smoother in ''C. aestuarii''. Also, the gonopods of ''C. aestuarii'' are straight and parallel, whereas those of ''C. maenas'' are curved. Whereas ''C. maenas'' has invaded many shorelines throughout the world, ''C. aestuarii'' has only been implicated in one invasion; the coastline of Japan has been invaded by either ''C. aestuarii'' or a hybrid of ''C. aestuarii'' and ''C. maenas''. ==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「Carcinus aestuarii」の詳細全文を読む
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