Extreme-environment
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Diasemocera petrolei
Petroleum Fly
Diasemocera petrolei, commonly known as the Petroleum Fly, is a species of shore fly in the family Ephydridae. It is notable for its association with petroleum seeps and asphalt deposits, where it completes its entire life cycle in pools of crude oil. The species was described by Coquillett in 1899 and represents an extreme example of adaptation to harsh chemical environments.