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2. Spider anatomy - Wikipedia

   en.wikipedia.org/wiki/Spider_anatomy

   The underside and head of a female spider. Spiders, unlike insects, have only two main body parts ( tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an abdomen (also called an opisthosoma ). The exception to this rule are the assassin spiders in the family Archaeidae, whose cephalothorax is divided into ...

3. Chelicerae - Wikipedia

   en.wikipedia.org/wiki/Chelicerae

   The basal parts of the chelicerae are the two iridescent green mouthparts. The chelicerae ( / kəˈlɪsəriː /) are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders. Commonly referred to as "jaws", chelicerae may be shaped as either articulated fangs, or as a type of pincers.

4. Book lung - Wikipedia

   en.wikipedia.org/wiki/Book_lung

   Spider book lungs (cross section) Internal anatomy of a female spider, book lungs shown in pink. A book lung is a type of respiration organ used for atmospheric gas exchange that is present in many arachnids, such as scorpions and spiders. Each of these organs is located inside an open ventral abdominal, air-filled cavity (atrium) and connects ...

5. Pedipalp - Wikipedia

   en.wikipedia.org/wiki/Pedipalp

   Pedipalp. Green-shaded pedipalps in an illustrated dorsal view of a whip scorpion. 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 ...

6. Spinneret - Wikipedia

   en.wikipedia.org/wiki/Spinneret

   A spinneret is a silk -spinning organ of a spider or the larva of an insect. Some adult insects also have spinnerets, such as those borne on the forelegs of Embioptera. [ 1] Spinnerets are usually on the underside of a spider's opisthosoma, and are typically segmented. [ 2][ 3] While most spiders have six spinnerets, some have two, four, or ...

7. Arachnology - Wikipedia

   en.wikipedia.org/wiki/Arachnology

   Arachnology. Arachnology is the scientific study of arachnids, which comprise spiders and related invertebrates such as scorpions, pseudoscorpions, and harvestmen. Those who study spiders and other arachnids are arachnologists. More narrowly, the study of spiders alone ( order Araneae) is known as araneology. [ 1]

8. Glossary of spider terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_spider_terms

   Accessory claw: Modified setae at the tip of the tarsus in web-building spiders; used with tarsal claws to grip strands of the web [1] Anal tubercle: A small protuberance (tubercule) above the spinnerets through which the anus opens [2] Apodeme: see sigillum. Apophysis (plural apophyses): An outgrowth or process changing the general shape of a ...

9. Opiliones anatomy - Wikipedia

   en.wikipedia.org/wiki/Opiliones_anatomy

   Opiliones anatomy. Opiliones (commonly known as harvestmen) are an order of arachnids and share many common characteristics with other arachnids. However, several differences separate harvestmen from other arachnid orders such as spiders. The bodies of opiliones are divided into two tagmata (arthropod body regions): the abdomen ( opisthosoma ...