trapdoor spider

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trapdoor spider,

burrow-dwelling spiderspider,
organism, mostly terrestrial, of the class Arachnida, order Araneae, with four pairs of legs and a two-part body consisting of a cephalothorax, or prosoma, and an unsegmented abdomen, or opisthosoma.
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 of the Old and New Worlds. Trapdoor spiders dig burrows, which they line with silk and protect by constructing one or two circular, hinged trapdoors. The spiders emerge through the snug-fitting camouflaged doors to search for prey. Usually the burrow entrance has a door, the outer surface of which is camouflaged to blend in with the surrounding terrain. If a second door is present, it is usually below the entrance door. Trapdoor spiders are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Arachnida, order Araneae, family Ctenizidae.
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References in periodicals archive ?
On some trapdoor spiders of the family Ctenizidae from South and West Australia, contained in the collection of the British Museum.
Therefore, there is a need to revise the diagnosis of genera, and the generic key of the family Ctenizidae.
On the taxonomic position of the East Asian species of the genus Ummidia Thorell, 1875 (Araneae: Ctenizidae).
Ballooning behavior of Ummidia spiderlings (Araneae, Ctenizidae).
Occurrence of the trap-door spider Conothele malayana (Doleschall) in Australia (Mygalomorphae: Ctenizidae).
It is tentatively identified as Ancylotrypa brevipalpis (Hewitt 1916) described as Pelmatorycter brevipalpis and originally placed in the family Ctenizidae by Hewitt based on material collected from Pretoria and from one other locality, Crocodile Bridge.