Traditionally, arachnids were considered a terrestrial monophyletic group—meaning they descended from a single colonization event of land by a terrestrial ancestor. However, recent phylogenomic ...

One of Australia's biggest and deadliest spiders is actually three different species, researchers discover — and one of these behemoth arachnids is even bigger than the rest. Sydney funnel-web ...

The tropical net-casting spider Deinopis spinosa joins several other arachnid species that can hear sounds from afar without the help of a web, or even ears—an ability that aids its unique hunting ...