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Dieren en planten

Arthropods   Arachnids (spiders)   Spiders   Daddy longlegs   Ticks   

Mens en Milieu

Ecology   Ecosystems   Ecological dynamics   Island biology   
Pisaura mirabilis (nursery web spider), jmb463, via www.flickr.com

Arachnids (spiders)

Arachnids are arthropods with four pairs of legs and an external skeleton. The body consists of two segments: the anterior part (cephalothorax) and the posterior part (abdomen). By some groups, the posterior and anterior parts have joined together, making it difficult to see where the one ends and the other begins.Examples of this group are spiders, ticks and harvestmen.