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Types of chelicerae: (A) jackknife, (B) scissor, and (C) 3-segmented chelate 3D view of the chelicerae of a jumping spider. The pedipalps were removed to see the chelicerae. Chelicerae can be divided into three kinds: jackknife chelicerae, scissor chelicerae, and three-segmented chelate chelicerae. [2]
Most spiders possess venom, which is injected into prey (or defensively, when the spider feels threatened) through the fangs of the chelicerae. Male spiders have specialized pedipalps that are used to transfer sperm to the female during mating. Many species of spiders exhibit a great deal of sexual dimorphism. [1]
Pedipalps (commonly shortened to palps or palpi) are the secondary pair of forward appendages among chelicerates – a group of arthropods including spiders, scorpions, horseshoe crabs, and sea spiders. The pedipalps are lateral to the chelicerae ("jaws") and anterior to the first pair of walking legs.
Others grind the prey to pulp using the chelicerae and the bases of the pedipalps, while flooding it with enzymes; in these species, the chelicerae and the bases of the pedipalps form a preoral cavity that holds the food they are processing. [13] The stomach in the cephalothorax acts as a pump that sends the food deeper into the digestive system.
All scorpions and almost all spiders are predators that "pre-process" food in preoral cavities formed by the chelicerae and the bases of the pedipalps. [ 16 ] [ 20 ] However, one predominantly herbivore spider species is known, [ 25 ] and many supplement their diets with nectar and pollen . [ 26 ]
Pedipalp and leg of a female spider from the underside; the coxa of the pedipalp is heavily modified to form the maxilla Segments or articles of the legs and pedipalps : Coxa (plural coxae): First leg segment, between body and trochanter; the coxa of the pedipalp is heavily modified to form the maxilla or endite
Spider behavior refers to the range of behaviors and activities performed by spiders. Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom . They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms [ 1 ] which is reflected in their ...
The spider has large pedipalps, which are usually used for sensory purposes. The female D. minor can easily be identified based on the position of the epigyne on the underside of the abdomen. They possess large chelicerae, which are located just below the eyes. [3] The spider has a body length of about 18 mm.