The hunting‐web of the young spider Pisaura mirabilis

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Abstract
In the Pisauridae both web‐building and non web‐building spiders are present, the former building webs comparable to the funnel‐webs of the Agelenidae. Pisaura mirabilis has always been described as a non web‐building spider catching the prey by sight.However the sexually immature Pisaura mirabilis has been found to build a web in which the animal sits.The structure of this web is not directly comparable to any other type of web, but some kind of relationship to the funnel‐web of the Agelenidae may exist.Even if the young Pisaura mirabilis is capable of catching prey without using the web, detection of the prey seems to be a main function of this structure.

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