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Most external appendages on the spider are attached to the cephalothorax, including the eyes, chelicerae and other mouthparts, pedipalps and legs. Like other arachnids, spiders are unable to chew their food, so they have a mouth part shaped like a short drinking straw that they use to suck up the liquefied insides of their prey.
The external anatomy of a spider, with the epigyne labeled The internal anatomy of a ... The epigyne or epigynum is the external genital structure of female spiders ...
In addition to preserving spiders' anatomy in very fine detail, pieces of amber show spiders mating, killing prey, producing silk and possibly caring for their young. In a few cases, amber has preserved spiders' egg sacs and webs, occasionally with prey attached; [93] the oldest fossil web found so far is 100 million years old. [94]
The jumping spider Phidippus audax.The basal parts of the chelicerae are the two iridescent green mouthparts. The chelicerae (/ k ə ˈ l ɪ s ər iː /) are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders.
Spider specialists (arachnologists) have developed a detailed terminology to describe the kind of palpal bulb found in most spiders. Starting from the end nearest the head: [ 6 ] [ 8 ] [ 9 ] [ 10 ] the cymbium is the modified tarsus of the palp ( Cb in the images)
In spiders, the coxae frequently have extensions called maxillae or gnathobases, which function as mouth parts with or without some contribution from the coxae of the anterior legs. The limbs themselves may be simple tactile organs outwardly resembling the legs, as in spiders , or chelate weapons (pincers) of great size, as in scorpions .
Copulatory opening: An opening in the ventral abdomen of female spiders; in entelegyne spiders, a double opening in the epigyne through which the embolus is inserted; in haplogyne spiders, a single opening through which male palpal bulb is inserted [6] Coxa: see segments; Crenulate: Having longitudinal ridges [7]
This file was derived from: Spider external anatomy.png: The image was cropped and re-labelled using current terminology. Author: Original: James Henry Emerton.