SEM of a fruit fly

SEM of a fruit fly

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Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of a fruit fly, Drosophila melanogaster, in the process of hatching. The fly is of the wild type, known as Oregon R. The adult fly, or imago, bursts out of the puparium using an inflatable sac called the ptilinum, a lip-shaped ridge in the middle of the head. The sac is pumped up with blood, & the pressure splits the puparium. The sac is withdrawn permanently into the head after hatching. The bristle-like extensions attached to the pads are the antennae. Spiracles, or breathing tubes, are seen on the peeled up edge of the puparium. Magnification: x20 at 35mm size, x40 at 6x4.5cm size.

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Keywords: animal, antenna, arista, bristlelike, drosophila melanogaster, eclosion, fruit fly, insect, insecta, invertebrate, invertebrates, nature, ptilinum, pupa, spiracle, wildlife, zoology

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