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・ Orchis anthropophora
・ Orchis brancifortii
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・ Orchis mascula
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Orchitophrya stellarum
・ Orchlon school
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・ Orchomenus (mythology)
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Orchitophrya stellarum : ウィキペディア英語版
Orchitophrya stellarum

''Orchitophrya stellarum'' is a single-celled marine ciliate protozoan, a member of the class Oligohymenophorea. It is found living freely in the north Atlantic and Pacific Oceans but is also parasitic, being found inside the gonads of starfish.
==Biology==
''Orchitophrya stellarum'' tolerates a sea temperature range of between and and a salinity range of between 2 and at least 30 parts per thousand of salt equivalent. The lower the temperature, the lower the acceptable level of salinity. Growth is most rapid at 24°C. It is a facultative parasite of sea stars in the Asteriidae family. It seems to be able to survive in the open sea indefinitely as long as there is a supply of bacteria and tissue detritus on which it can feed.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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