Mayfly nymph head, SEM

Mayfly nymph head, SEM

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Caption: Mayfly nymph head, scanning electron micrograph (SEM). Mayflies (order Ephemeroptera) are the oldest surviving winged insects. This is a nymph, one of the larval forms that develops into an adult mayfly. It has compound eyes (one at upper right). The sensory structures called antennae are at top left. The mouthparts are at lower left. Mayfly nymphs are aquatic freshwater insects. They obtain their food from decaying vegetation, green algae and diatoms. Mayflies spend most of their lives in the larval form (from months to years). The adult winged form exists for only a few days, its role being reproduction. Magnification: x46 when printed 10cm wide.

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Keywords: anatomical, anatomy, animal, antenna, antennae, aquatic, biological, biology, coloured, compound, entomology, eye, false-colour, false-coloured, fauna, freshwater, head, imago, insect, invertebrate, invertebrates, jaw, jaws, larva, larval, mandible, mandibles, mayfly, mouth, mouthpart, mouthparts, nature, nymph, one, scanning electron micrograph, scanning electron microscope, sem, single, stage, wildlife, young, zoological, zoology

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