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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. Commonly referred to as "jaws", chelicerae may be shaped as either articulated fangs, or as a type ...
The chelicerae ("claw horns") that give the sub-phylum its name normally consist of three sections, and the claw is formed by the third section and a rigid extension of the second. [ 12 ] [ 19 ] However, spiders' have only two sections, and the second forms a fang that folds away behind the first when not in use. [ 16 ]
Setapedites shares similarities with Offacolus like the elongated chelicerae and limb arrangement, however the number of segments is closer to that of Dibasterium.Unusually, it also shares some features with Habelia like the anal pouch and structure of the opisthosomal tergites. [1]
Carnivores have chelicerae that tear and crush prey, whereas herbivores can have chelicerae that are modified for piercing and sucking (as do parasitic species). In sea spiders, the chelicerae (also known as chelifores) are short and chelate and are positioned on either side of the base of the proboscis or sometimes vestigial or absent.
They are extremely sexual dimorphic: males have exaggerated chelicerae (jaws), which are reduced in females. As with several other species of the genus Pantopsalis, the male chelicerae have two morphs or forms, long and short. Unusually, the morph with shorter chelicerae are not merely a scaled-down version of the long morph, but instead are ...
The function of pterygotid chelicerae was likely the same as the chelicerae of other eurypterids as well as those of other arthropods, such as crustaceans and xiphosurans; the capture and cutting of food into smaller pieces and transport of food into the mouth as well as defense. Though most other eurypterid families had simple pincers, the ...
The chelicerae are the paired cutting jaws, which cut a channel into skin for the hypostome. The hypostome is the single feeding tube, which also anchors the tick by its reverse barbs. The basis capituli forms the basal ring of cuticle to which the palps, chelicerae and hypostome are attached.
Members of the Mecysmaucheniidae also have an elongated prosoma and chelicerae, although less so than archaeids. When hunting prey, mecysmaucheniids hold their chelicerae widely open. Long, forward directed hairs (setae) appear to act as triggers; when these are touched by prey, the chelicerae rapidly snap shut, enabling mecysmaucheniids to ...