A harvestman (a male Phalangium opilio), showing the almost fused arrangement of abdomen and cephalothorax that distinguishes these arachnids from. The Harvestmen are eight-legged. How To Run A Program In 32 Bit Mode.

Harvestman anatomy. Harvestmen are an order of arachnids, with which they share many characteristics: their body is divided into two body regions (tagmata), the abdomen (opisthosoma) and the cephalothorax (prosoma); however, unlike in spiders, the juncture is often poorly defined.

Although they belong to the class of, harvestmen are not. They belong to the Opiliones or Phalangids. More than 6,400 species of harvestmen have been discovered, although the real number of species may exceed 10,000. Well-preserved have been found in the 400-million year old of.

The samples found look surprisingly modern. Apparently, the basic structure of the harvestmen has not changed much since then. In some places, harvestmen are known by the name 'daddy longlegs', but this name is also used for two other unrelated arthropods: the ( Tipulidae) and the ( Pholcidae). Many species are, they eat anything they can find. Most of the time this is small, and some and. Harvestmen are not dangerous to humans.