The first sequenced genome of a daddy-long-legs has revealed the genetic tricks that these creatures use to make their lengthy, grasping legs.
Most of these leggy invertebrates are not spiders but belong instead to a group called harvestmen (order Opiliones). Guilherme Gainett at the University of Wisconsin-Madison, Vanessa González at the National Museum of Natural History in Washington DC and their colleagues sequenced the genome of the long-legged harvestman Phalangium opilio and found that the creature has a single cluster of Hox genes, a type of master gene that influences the body plan of all animals.