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Belgica antarctica
''Belgica antarctica'', the Antarctic midge, is a species of flightless midge, endemic to the continent of Antarctica. At long, it is the largest purely terrestrial animal on the continent, as well as its only insect.
It also has the smallest known insect genome as of 2014, with only 99 million base pairs of nucleotides (and about 13,500 genes).
==Physiology==
The flightlessness of ''B. antarctica'' may be an adaptation to prevent wind from blowing it into inhospitable areas.〔 It can survive the freezing of its body fluids and has a lifespan of two years; with the two growing seasons, it is able to accumulate the energy needed to reproduce. With its deep purplish black coloration it is able to absorb heat to survive. It is also able to tolerate large changes in salinity and pH and can survive without oxygen for 2–4 weeks.
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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