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Caddisfly head, SEM
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Caddisfly head, SEM
Caddisfly head. Coloured scanning electron micrograph (SEM) of the head of a caddisfly (order Trichoptera). At centre are the flys mouthparts. Its mandibles (biting mouthparts), which are greatly reduced, are at lower centre, below these are the labial palps. At centre right and left are the maxillary palps. Both pairs of palps are sensory organs, covered in hairs. At right and left are the compound eyes (red), made up of many individual ommatidia (spheres). Adult caddisflies are short-lived moth-like insects. They have hairy wings, opposed to the scaly wings of moths and butterflies. The caddisfly larvae are aquatic. The adults hatch en masse, creating great swarms over lakes and rivers that attract fish. Due to this caddisflies are often used as bait by fishermen
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Media ID 6466915
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Eyes Hair Hairs Insecta Mandible Mandibles Maxillary Mouth Ommatidia Ommatidium Palp Palps Sensory Bait False Coloured Short Lived Trichoptera
EDITORS COMMENTS
This print showcases the intricate details of a caddisfly head, captured using a scanning electron microscope (SEM). The vibrant colors highlight the various components of this fascinating insect's anatomy. At the center of the image, we can observe the fly's mouthparts, with its mandibles prominently displayed below. These biting mouthparts are greatly reduced in size and are accompanied by labial palps just below them. On both sides, we find maxillary palps that serve as sensory organs covered in delicate hairs. The compound eyes steal attention on either side of the head, appearing as striking red spheres composed of numerous individual ommatidia. Adult caddisflies resemble moths but possess hairy wings instead of scales found in their counterparts. Interestingly, these short-lived insects spend their larval stage underwater before emerging into swarms over lakes and rivers during adulthood. Their mass emergence attracts fish and makes them popular bait among fishermen. This stunning SEM image not only highlights the beauty and complexity within nature but also provides valuable insights into entomology and zoological studies. With its false-colored presentation, it offers an engaging perspective on this remarkable species' biology while showcasing the power of scanning electron microscopy to unlock hidden wonders within our natural world.
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