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Mouthparts of spiders and horseshoe crabs
The chelicerae (/kəˈlɪsəriː/) are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders
Chelicerae
Order of arachnids
flagella, one on each chelicerae, which are visible near the tip of each chelicerae. The flagella, which bend back over the chelicerae, are sometimes called
Solifugae
Subphylum of arthropods
mites, which have lost any visible division between these sections. The chelicerae, which give the group its name, are the only appendages that appear before
Chelicerata
the abdomen and cephalothorax is often poorly defined. Harvestmen have chelicerae, pedipalps and four pairs of legs. Harvestmen were traditionally thought
Opiliones_anatomy
Appendage of chelicerate
scorpions, horseshoe crabs, and sea spiders. The pedipalps are lateral to the chelicerae ("jaws") and anterior to the first pair of walking legs. Pedipalps are
Pedipalp
Extinct genus of stem-chelicerates
species; Megachelicerax cousteaui. As the oldest known arthropod to bear chelicerae, Megachelicerax is significant in the evolutionary history of chelicerates
Megachelicerax
Mouthparts of arthropods
the chelicerae have teeth, which are used to macerate prey items to assist digestion by secreted enzymes. Those spiders without toothed chelicerae inject
Arthropod_mouthparts
Extinct Devonian genus of Eurypterida
from other groups in several features, especially in the chelicerae and the telson. The chelicerae of the Pterygotidae are enlarged and robust, clearly adapted
Jaekelopterus
Pincer-like organ terminating certain limbs of some arthropods
raptorial front legs of the mantis, the grasping claws of lice, and some chelicerae such as spider fangs. Chelae are common amongst Decapoda, a group which
Chelae
Physiology of Spiders (order Araneae)
segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically
Spider_anatomy
Family of spiders
snakes. The eight legs, the two chelicerae with their fangs, and the pedipalps are attached to the prosoma. The chelicerae are two double-segmented appendages
Tarantula
Family of spiders
described by Anton Menge in 1866. They have elongated bodies, legs, and chelicerae, and build small orb webs with an open hub with few, wide-set radii and
Long-jawed_orb_weaver
Order of arachnids
differences include the fact that Opiliones have no venom glands in their chelicerae and thus pose no danger to humans. They also have no silk glands and therefore
Opiliones
Small eight-legged arthropod
Two-segmented chelicerae is the ancestral condition in Acariformes, but in more derived groups they are single-segmented. And three-segmented chelicerae is the
Mite
Pointed specialized tooth
snake venom). Spiders also have external fangs, which are part of the chelicerae. Fangs are most common in carnivores or omnivores, but some herbivores
Fang
Species of harvestman
plains. This species is known to feed on snails using their large sturdy chelicerae used to crack open their shells. Ischyropsalis hellwigi is a member of
Ischyropsalis_hellwigi
Infraorder of arachnids
"true spiders") are an infraorder of spiders. They are distinguishable by chelicerae (fangs) that point diagonally forward and cross in a pinching action,
Araneomorphae
Family of spiders
their spinnerets, while the Pisauridae carry their egg sacs with their chelicerae and pedipalps. Two of the wolf spider's eight eyes are large and prominent;
Wolf_spider
Species of spider
shiny) pale beige to yellow-brown abdomen, sometimes dark grey. Their chelicerae are disproportionately large for a spider of this size. Dysdera crocata
Woodlouse_spider
Genus of spiders
which are tipped with small claws; then injecting venom with their hollow chelicerae to kill and digest the prey. They mainly eat insects, but some larger
Dolomedes
Extinct genus of arthropods
flattened telsons (the most posterior segment of the body) and their modified chelicerae (frontal appendages), ending in well-developed chelae (claws). Many pterygotid
Acutiramus
Extinct class of arthropods
and millipedes, among others). The former hypothesis is based on the chelicerae-like morphology of the great appendages, alongside neuroanatomy and the
Megacheira
Species of spider
Females reach a body length of about 16 mm (0.63 in). Its iridescent chelicerae can range in color from purple to green. Females position their single
Phidippus_otiosus
Extinct order of Cambrian arthropods
They are suggested to be stem-group chelicerates, though they lack the chelicerae present in true chelicerates. They may be the ancestral group from which
Habeliida
Genus of arachnids (goblin spiders)
Atlantic Forest. The genus is characterized by the extremely modified male chelicerae and long pairs of ventral spines. It is the first fully revised endemic
Predatoroonops
Genus of spiders in the family Salticidae
and many species are characterized by their brilliant, iridescent green chelicerae. Phidippus is distributed almost exclusively in North America, with the
Phidippus
Fear of spiders and other arachnids
fear and disgust of spiders were triggered predominantly by enlarged chelicerae, enlarged abdomen, and the presence of body hair, an observation integrated
Arachnophobia
Superfamily of spiders
enlarged spade-like front legs, and heads raised up on a "neck" with long chelicerae ("jaws"). Fossils suggest that the group was once widespread, but most
Palpimanoidea
Species of scorpion
Mesobuthus vesiculatus is a species of scorpion in the family Buthidae. It is primarily located in Iran, ranging from the Caucaso-Iranian Highlands to
Mesobuthus_vesiculatus
Extinct genus of synziphosurine
prosoma with six appendage pairs. The first appendage pairs are elongated chelicerae, with the other five being biramous appendages. The exopods of these appendages
Setapedites
Species of spider
of male, with the larger form having porrect chelicerae and the smaller form having non-porrect chelicerae. This species was described in 1973 by Ray Forster
Cambridgea_reinga
Species of spider
three white stripes of setae on its cephalothorax, black setae on its chelicerae, and scattered dots and patterns of black and white setae on its abdomen
Lycosa_aragogi
Genus of spiders
stridulate by using small spines present on the chelicerae. They have special stridulating organs in their chelicerae, which are made of short spines. Males have
Chilobrachys
Species of spider
its relative D. crocata, this spider uses its disproportionately huge chelicerae to kill woodlice, as well as silverfish, earwigs, millipedes, beetles
Dysdera_erythrina
Species of arachnid (type of jumping spider)
jumping spiders easily identified by their large eyes and iridescent chelicerae. The bold jumper itself bears white abdominal dorsal spots, one of them
Phidippus_audax
Species of jumping spider in the genus ''Phidippus''
basal band, a central triangular spot, and two posterior oval spots. The chelicerae are large and iridescent green-blue-violet in color, with a tubercle on
Phidippus_regius
Genus of spiders
within the genus may be identified by their elongate, horizontal, parallel chelicerae. As of June 2019[update] it contains four species, found in Guatemala
Bagheera_(spider)
Species of spider
distinct distribution. The species is known for its long three-segmented chelicerae. Pocock, Reginald Innes (1902). "On some new harvest-spiders of the order
Pantopsalis_albipalpis
Extinct genus of arthropods
†Mollisoniida †Wisangocaris Habeliida †Habelia †Sanctacaris †Utahcaris chelicerae present †Megachelicerax †Offacolus †Setapedites †Dibasterium †Weinbergina
Habelia
Species of tarantula
common name is derived from the fact they have orange hairs around the chelicerae. Females are able to live to up to 12 years, while males only up to 3
Psalmopoeus_reduncus
Species of spider
brownish-white stripe on either side of the abdomen. The carapace and chelicerae are also black and white and the legs have transverse bandings of the
Menemerus_bivittatus
Genus of spiders
Mygalomorphae, they can be easily distinguished by the large pair of chelicerae, as well as by the placement of two small eyes in the centre of the head
Missulena
Extinct genus of eurypterid
most prominently in the chelicerae (the first pair of limbs) and the telson (the posteriormost division of the body). The chelicerae of the Pterygotidae were
Pterygotus
Sexual selection mechanism
Peacock spider males perform courtship dances that display their boldly patterned chelicerae, legs, and abdomens. Females are cryptic brown.
Fisherian_runaway
Type of animal behavior
spiders. Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom. They are the largest order of arachnids
Spider_behavior
Extinct genus of spiders
distinctive "neck" separating the head from the thorax, and very long chelicerae ("jaws"). In the genus Archaea, the head is separated from the thorax
Archaea_(spider)
Proposed clade of arthropods
raptorial appendages with 6 or less segments (e.g. great appendages, chelicerae), and exites of trunk appendages with overlapping lamellae which evolved
Cheliceromorpha
Species of spider
with reddish brown or yellowish legs. The male has distinctive enlarged chelicerae (the mouthparts used for grasping prey) and front femora (the third, and
Zygoballus_sexpunctatus
Species of spider
humans, only mature females are capable of envenomation in humans; their chelicerae—the hollow, needle-like mouthparts that inject venom—are approximately
Latrodectus_mactans
Tube structure formed in response to trombiculid mite bites
mouthparts as hematophagous animals have been known to have, but have chelicerae, which only pierce the skin. The tube is formed by the digestive enzymes
Stylostome
Species of spider
worker due to their elongated chelicerae which may be as long as one-third to half their body length. These elongated chelicerae are a secondary sexual characteristic
Myrmaplata_plataleoides
Family of spiders
in the infraorder Mygalomorphae, that have two pairs of booklungs, and chelicerae (fangs) that move up and down in a stabbing motion. A number of genera
Dipluridae
Species of spider
that waits for prey to come within reach and snatches them using its chelicerae (clawlike pincers). P. mira is most well known for its sexually cannibalistic
Pisaurina_mira
Order of arachnids
Spiders (order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude
Spider
Species of mite
blades of grass and wait for a potential host. With their "blade-like chelicerae", they attach themselves to the hosts and feed on their tissues. After
Neotrombicula_autumnalis
Phylum of invertebrates with jointed exoskeletons
organisms characterized by the presence of chelicerae, appendages just above/in front of the mouthparts. Chelicerae appear in scorpions and horseshoe crabs
Arthropod
Species of harvestman endemic to New Zealand
broad. The chelicerae are used for combat between males: males with long chelicerae use them for grappling, while males with short chelicerae stab or punch
Pantopsalis_cheliferoides
Extinct genus of arthropods
chelicerae are very diverse between species, but they are generally very long with small curved teeth without serrations. Studies on the chelicerae and
Erettopterus
Extinct genus of arthropods
†Leanchoiliidae †Mollisoniida †Wisangocaris †Habelia †Sanctacaris †Utahcaris chelicerae present †Megachelicerax †Offacolus †Setapedites †Dibasterium †Weinbergina
Sanctacaris
Family of spiders
have intersecting fangs, with the exception of some species which have chelicerae in an angle that is neither orthognathous or labidognathous. These long-legged
Lampshade_spider
Genus of arachnid
be the surrounding areas of Newberry Volcano. It has enlarged but thin chelicerae, typically equal to or longer than the entire length of the body, and
Taracus_marchingtoni
Species of spider
bearer, from Latin clava "club" and gerere "to carry") refers to the large chelicerae in males. The species was originally described by Tamerlan Thorell in
Myrmarachne_clavigera
Pair of mouthparts used either for biting or cutting and holding food
all living arthropods except arachnids and other chelicerates. Unlike chelicerae, mandibles are often used to chew food. Insect mandibles are as diverse
Mandible (arthropod mouthpart)
Mandible_(arthropod_mouthpart)
Species of spider
on each leg. The similarly coloured brown carapace darkens nearer the chelicerae and eyes. Its eight eyes are small and black, with the front middle pair
Badumna_longinqua
Species of spider
at Cape Campbell. The spider is over 8 mm in length, with very large chelicerae (fang-like structures), a red-brown cephalothorax (head region) and a
Desis_marina
Order of arthropods (fossil)
pair of appendages, the only pair placed before the mouth, is called the chelicerae (homologous to the fangs of spiders). They were equipped with small pincers
Eurypterid
Species of spider
is a pale yellow-beige colour with dark brown markings on its palps, chelicerae (jaws) and on the ends of its tarsi (feet). There is also often an orange-brown
Cheiracanthium_inclusum
Genus of spiders
elongated cephalothorax with relatively long chelicerae that projects forward in males. The chelicerae of males can lack venom glands. The cephalothorax
Myrmarachne
Species of spider
kept as pets. As it common name may suggest, they have magnificent blue chelicerae, cyano meaning blue and gnathus meaning jaw. This tarantula is a burrowing
Ephebopus_cyanognathus
Species of harvestman/daddy longlegs
to horns, on the second segment of their chelicerae. In some European populations, P. opilio male chelicerae and pedipalpal size have significant allometric
Phalangium_opilio
Species of spider
spider antivenom. Normally, A. sutherlandi has a glossy black back and chelicerae ("fangs"), as well as a deep-brown or plum-coloured underbelly. An adult
Atrax_sutherlandi
Species of spider
colour, with less setae and longer appendages. The males also have long chelicerae which point in opposite directions, similar to that of Hyllus walckenaeri
Hyllus_giganteus
Species of mite
appearance. The small eyes are located on stalks. They have scissor-like chelicerae and their pedipalps are used as touch organs. Its bright red color results
Trombidium_holosericeum
Genus of spiders
sigillae and a single row of teeth on the forward-facing margin of the chelicerae. Males have many strong spines on the forward-facing margin of their tibiae
Porrhothele
Species of spider
mildei usually has a pale green or tan body, with darker brown palpi and chelicerae. An adult C. mildei is usually 7–10 millimetres (0.3–0.4 in) in body size
Cheiracanthium_mildei
Extinct family of eurypterids
body) likely used as rudders to provide additional agility and enlarged chelicerae (frontal appendages) with claws. These claws were robust and possessed
Pterygotidae
Species of spider
their prey in webs, but subdue their victims with their venomous fangs (chelicerae). They are harmless to humans and larger animals and are not aggressive
Oxyopes_lineatus
Shared ancestry between a pair of structures or genes in different taxa
Centipede (Myriapoda) Insect (Hexapoda) Shrimp (Crustacea) 1 antennae chelicerae (jaws and fangs) antennae antennae 1st antennae 2 1st legs pedipalps -
Homology_(biology)
Species of spider
It is 28 mm long, or 30 mm with chelicerae included. The fovea is procurved. The retrolateral face of the chelicerae is setae-less and the stridulatory
Selenobrachys_philippinus
Genus of spiders
long scopula surrounded by plumose setae on the retrolateral side of the chelicerae. It can be further distinguished by the a transverse fovea, multiple lobes
Bacillochilus
Genus of spiders
tarantulas, meaning they have a stridulating organ on the inner side of the chelicerae. They can be distinguished from other genera by the row of spines found
Annandaliella
Species of spider
lateral margins and furrows separating the head and thoracic regions. The chelicerae are brownish-yellow with a reddish-brown fang groove. The maxillae are
Tetragnatha_praedonia
Form of jointed appendage of arthropods
Centipede (Myriapoda) Insect (Hexapoda) Shrimp (Crustacea) 1 antennae chelicerae (jaws and fangs) antennae antennae 1st antennae 2 1st legs pedipalps -
Arthropod_leg
Species of spider
produced by the spider stridulating a patch of setae associated with its chelicerae. It has also been called the "eastern tarantula". The species name crassipes
Selenocosmia_crassipes
Species of spider
bright red abdomen; the female has an additional black central stripe. The chelicerae of both sexes are of a shining teal color. The rest of the body is mostly
Phidippus_johnsoni
Species of arachnid
spider. A sample of seven females had a total body length (excluding chelicerae and spinnerets) in the range 52–54 mm (2.0–2.1 in). A sample of 11 males
Brachypelma_hamorii
Bite caused by a spider
Spider bite Chelicerae of a black wishbone (nemesiid) spider, a mygalomorph Specialty Emergency medicine Complications Envenomation Causes Spiders
Spider_bite
Family of spiders
foods—woodlice. Dysdera also feeds on beetles. These spiders have very large chelicerae. Their long fangs are specialized to reach under or slip between the armored
Dysderidae
Extinct genus of scorpion
legs as well as larger pincer-like pedipalps and smaller pincer-like chelicerae (mouthparts). One characteristic trait of Pulmonoscorpius is the presence
Pulmonoscorpius
Infraorder of arachnids (spiders)
Mesothelae, they have two pairs of book lungs, and downward-pointing chelicerae. Because of this, the two groups were once believed to be closely related
Mygalomorphae
Family of spiders
spider silk in liquid form, though it is produced in venom glands in the chelicerae. The venom-laced silk both immobilizes and envenoms prey such as silverfish
Spitting_spider
Predator that hunts by surprise, as opposed to those that chase
burrow entrance. When the spider is using the trap to capture prey, its chelicerae (protruding mouthparts) hold the door shut on the end furthest from the
Ambush_predator
Species of spider
golden spots on the abdomen. They are elongated spiders with long legs and chelicerae. They are orb web weavers, weaving small orb webs with an open hub and
Leucauge_fastigata
Species of spider in the family Agelenidae
apparently cleans the chelicerae of components unusable for the spider from the respective prey object. If the spider cleans its chelicerae by bites into the
Coelotes_terrestris
Group of venomous spiders
than wide with a conspicuous deeply impressed fovea. The clypeus and chelicerae are directed to the front, usually with a "violin-shaped" darker marking
Recluse_spider
Genus of spiders
eyes. Their legs are long, slender, and have small claws attached to the chelicerae. Scytodes species are mainly nocturnal and typically do not live in webs
Scytodes
Clade of arthropods
mandibulates (as well in the extinct artiopods like trilobites) and the chelicerae in chelicerates. All deuteropods are suggested to have a multi-segmented
Deuteropoda
Family of spiders
araneomorph spiders (more recently evolved spiders with inward-pointing chelicerae) first described by Eugène Simon in 1897 as a subfamily called "Tracheleae"
Trachelidae
where the fang closes against a tooth-like process Chelicera (plural chelicerae): One of two appendages at the front of the carapace, made up of basal
Glossary_of_spider_terms
Subtribe of spiders
generally show paired spots on the abdomen, and the males often have enlarged chelicerae. Females in this subtribe typically have S-shaped epigynal openings. As
Dendryphantina
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