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  • Cribellate Orb Weaver - (Uloborus spp.)

    Cribellate Orb Weaver - (Uloborus spp.)

    The tropical Cribellate Orb Weaver spins very fine silk webs that ensnare without need for adhesion.

    Staff Writer (1/3/2014): The legs of this spider are hairy with flared, feathery tufts of hair at the 'ankles'. The front pairs of legs are extremely long. Often, these front legs are clustered next to each other, elongating the size of the spider as it sits on its web. The abdomen has two bumps, near the thorax, giving it a more boxy appearance as opposed to the more typical round shape of other spiders.

    Webs are built flat and parallel to the ground, at or around knee-height. The spider sits on, or near it, in a 'tucked' position, and sometimes on the underside of the web, giving it the appearance of a dead flower or piece of leaf. The Cribellate Orb Weaver creates a web that lacks sticky silk. Instead, small prey get tangled in the tiny gaps between the fine threads in such a way that the typical 'glue' other spiders have on their silk is not necessary. The cribellum on the legs allow the spider to 'comb' its web, keeping the fine strands separated until prey enters.

    This tiny spider is found in humid, tropical climates and lacks venom. They kill their victims by winding them tightly in silk, squeezing them to death.

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    Details of the:
    Cribellate Orb Weaver

    Category: Spider
    Common name: Cribellate Orb Weaver
    Scientific Name: Uloborus spp.
    Other Names: Feather-legged Orb Weaver

      Kingdom: Animalia
       Phylum: Arthropoda
        Class: Arachnida
         Order: Araneae
          Family: Uloboridae
           Genus: Uloborus
            Species: spp.

    Size (Adult, Length): 3mm to 7mm (0.12in to 0.28in)

    Identifying Colors: brown; tan; white

    Additional Descriptors: long, tucked, silk

    North American Reach (Though Not Limited To*): Florida; Georgia; Alabama; Mississippi; Louisiana; Texas

    * Keep in mind that an insect's reach is not limited by lines on a map and therefore may appear in areas/regions/states beyond those listed above.

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