the Palpenläufer (also tracer runner) (lat. Palpigradi) are an order of the Kieferklauenträger and at the same time the Arachnids (Arachnida).World-wide scarcely 80 kinds are well-known, which reach body lengths of only two to three millimeters. In Europe 26 kinds (with subspecies 34) are admit-> tracer runners in Europe.
building of the Palpenläufer
the figure of the Palpenläufer reminds of that of the scourge scorpios, therewith them likewise the abdomen in a multielement Flagellum ends. Remarkable is also here the first pair of run legs, which is put on as with the scourge spiders and scourge scorpios to long palpation organs with increased number of leg members. The Pedipalpen is leg-like and as run leg is used. The Kieferklauen(Cheliceren) are relatively large and for holding the booty (small Springschwänze) before the mouth are used. The Palpenläufer is perfectly colorless and possesses no eyes.
reproduction and development
over the reproduction and the development of the Palpenläufer is near nothingadmits. With some kinds males arise, for this reason are very rarely accepted that the Palpenläufer increases partly parthenogenetisch.
systematics of the Palpenläufer
the exact position of the Palpenläufer in the system of the Arachnids are not completely clarified so far. The most usual version placesit within the Apulmonata (lung lots of Arachnids) as group of sisters the other member of this group opposite (see Kieferklauenträger) and justifies this particularly with the missing fan lungs. An alternative places it to the scourge spiders, scourge scorpios and Web spiders as group of sisters in relation to on the basis several smallermorphologic changes.