Chinese Hourglass Spider (Cyclocosmia ricketti)Cyclocosmia or trapdoor spider is a genus of spiders in the Halonoproctidae family. The abdomen of spiders in this genus is abruptly truncated and ends in a hardened disc which is strengthened by a system of ribs and grooves. They use this to clog the entrance of their 7 to 15 cm deep vertical burrows when threatened, a phenomenon called phragmosis. Strong spines are located around the edge of the disk. The four spinnerets are found just anterior to