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  • Cork-Lid Trapdoor Spider - (Ummidia spp.)

    Cork-Lid Trapdoor Spider - (Ummidia spp.)

    Shallow bunkers covered with spider silk and debris hide stealthy Cork-Lid Trapdoor Spiders from unsuspecting nearby prey.

    Picture of Cork-Lid Trapdoor Spider
    Staff Writer (8/8/2017): The 'hider' also does the seeking in this life-and-death game of "What's for Dinner". Cork-Lid Trapdoor Spiders dig out tunnels in the ground close to walkways used by bugs, lizards and small mammals using their mouthparts and legs. This increases the likelihood of catching something. They use their silk to create a lid to cover it. The lid is made to fit the exact size of the opening, like a cork in a bottle. The spider also gives it a hinge so it can run out to attack or chase down and insect without losing it. The lid closes on its own, concealing the retreat. Once the spider senses the presence of a passerby (likely by vibration or tremors), it flips up the trapdoor, grabs its meal, it returns to the retreat to consume it.

    This family of spiders are smaller and less hairy than Tarantulas, but they come from the same infraorder so they are distant relatives. Females use the tunnel to lay eggs and raise young spiderlings. Unlike other types of spiders, the mother stays in the nursery, protecting them from parasitic predators like wasps until the spiderlings are able to forge out on their own.

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    Details of the:
    Cork-Lid Trapdoor Spider

    Category: Spider
    Common name: Cork-Lid Trapdoor Spider
    Scientific Name: Ummidia spp.

      Kingdom: Animalia
       Phylum: Arthropoda
        Class: Arachnida
         Order: Araneae
          Family: Ctenizidae
           Genus: Ummidia
            Species: spp.

    Size (Adult, Length): 15mm to 18mm (0.59in to 0.71in)

    Identifying Colors: black, white

    Additional Descriptors: shiny, fast, round, rings, bands, hairy, divot, dimple, door

    North American Reach (Though Not Limited To*): Alabama; Arizona; Arkansas; Florida; Georgia; Louisiana; Mississippi; New Mexico; Texas; Virginia; West Virginia; Mexico

    * 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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