Spider (Unknown sp.)

  • Lauren Holden
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Attribution 4.0 International (CC BY 4.0)

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Spider (Unknown sp.). Lauren Holden. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.

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SEM of a spider with its legs wrapped underneath it's body. Spider legs all have a similar morphology, comprising seven component parts and culminating in a claw, the appearance and composition of which can vary. Unlike the majority of arthropods who use muscular action to extend their limbs, spiders use hydraulic pressure, a characteristic retained from their ancestors, with the result that the legs curl up beneath the body upon their death. Scanning electron micrograph; x 16; spider is approximately 6 mm in length.


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