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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 ...
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.
However, spiders' chelicerae form fangs that most species use to inject venom into prey. The group has the open circulatory system typical of arthropods, in which a tube-like heart pumps blood through the hemocoel, which is the major body cavity. Marine chelicerates have gills, while the air-breathing forms generally have both book lungs and ...
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]
Close-up of the chelicerae of a harvestman. The chelicerae consist of three segments, with the distal two forming a pincer [3] equipped with a row of teeth. Based on developmental gene expression data, the proximal segment is thought to be homologous to the femur and patella of the legs, the middle segment to the tibia through the tarsus of the legs, and the distal segment to the apotele (the ...
P. cheliferoides is a dark-coloured harvestman. 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.
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.
The opisthosoma is the posterior part of the body in some arthropods, behind the prosoma (cephalothorax). [1] It is a distinctive feature of the subphylum Chelicerata (arachnids, horseshoe crabs and others).