出典:Wikipedia
出典:『Wikipedia』 (2011/05/08 09:02 UTC 版)
Previously interpreted as the world's oldest spider, Attercopus belongs to an extinct order of arachnids named Uraraneida; thought to be close to the origins of spiders. Attercopus can be envisaged as a spider-like animal able to produce silk, but which lacked true spinnerets and retained a segmented abdomen bearing a flagellum-like tail resembling that of a whip scorpion.