Cyclocosmia Ruyi
''Cyclocosmia'' is a genus of Mygalomorphae, mygalomorph trapdoor spiders in the family Halonoproctidae, first described by Anton Ausserer in 1871. Originally placed with the Ctenizidae, when the family split in 2018, this genus was placed with the Halonoproctidae as the type genus. The name is derived from the Greek "kyklos" (), meaning "circle", and "kosmeo" (), meaning "to adorn". Description These are trapdoor spiders, whose species are distinguished from each other by the pattern of the abdominal disk, the number of hairs on its seam, and the shape of the spermathecae. They have abdomens that are abruptly truncated, ending in a hardened disc that is strengthened by a system of ribs and grooves. They use this to clog the entrance of their burrows when threatened, a phenomenon called phragmosis. The disks have strong spines around the edge, and they each have four Spinneret (spider), spinnerets just anterior to it. The posterior, retractable spinnerets are particularly large. ...
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Cyclocosmia Truncata
''Cyclocosmia truncata'' is a species of cork-lid trapdoor spider in the family Halonoproctidae. It is found in the United States. References External links

* Halonoproctidae Articles created by Qbugbot Spiders described in 1841 {{Halonoproctidae-stub ...
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