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Topic: Pedipalp

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Chelicerata

	Anatomy of scorpions
		The tibia and tarsus forms the chelae of the pedipalp.
		Curiously, it does have an abduction muscle which is absent in the pedipalp.
		Pattern and shape is used extensively in differentiating the families.
	web.singnet.com.sg /~chuaeecc/anat/anat1.htm (845 words)

	Pedipalp - Wikipedia, the free encyclopedia
		Pedipalps, the second pair of appendages of the cephalothorax in Arachnida, is homologous with mandibles in Crustacea, and corresponding to the mandibles of insects.
		The pedipalps are appendages of six segments: the coxae, a single trochanter, the femur, a short patella, the tibia, and the tarsus.
		The pedipalps are distinctly raptorial in Amblypygi, Thelyphonida, Schizomida and Opiliones.
	www.knowledgehunter.info /wiki/Palp (391 words)

	NationMaster - Encyclopedia: Pedipalp (Site not responding. Last check: 2007-10-28)
		Pedipalps are a pair of "feelers" on the front end of a spider's prosoma (aka cephalothorax), which can be thought of as its head.
		On the pedipalp, the movable finger (considered to be the tarsus of the pedipalp) bears a series of denticles along its cutting margin, as for the fixed finger.
		The prosoma bears the carapace dorsally and the coxosternal region ventrally; the chelicerae, pedipalps, and four pairs of legs are associated with the prosoma.
	www.nationmaster.com /encyclopedia/Pedipalp (516 words)

	Glossary
		On the pedipalp, the femur bears trichobothria, setae, and carinae of taxonomic importance.
		On the pedipalp, the movable finger (considered to be the tarsus of the pedipalp) bears a series of denticles along its cutting margin, as for the fixed finger.
		The prosoma bears the carapace dorsally and the coxosternal region ventrally; the chelicerae, pedipalps, and four pairs of legs are associated with the prosoma.
	www.vaejovidae.com /Glossary.htm (1750 words)

	Pedipalp (Site not responding. Last check: 2007-10-28)
		male and female pedipalps in Zygiella x-notata Pedipalps, the second pair of appendages of the cephalothorax in Arachnida, is homologous with mandibles in Crustacea, and corresponding to the mandibles of insects.
		The pedipalps are appendages of six segments: the coxae, a single trochanter, the femur, a short patella, the tibia, and the tarsus.
		Pedipalp chelae are found in several arachnid groups, Ricinulei, Thelyphonida, Scorpiones and Pseudoscorpiones, but the chelae in most of these taxa do not appear to be homologous with those found in Xiphosura.
	www.kiwipedia.com /pedipalp.html (204 words)

	IngentaConnect The Influence of Pedipalp Autotomy on the Courtship and Mating Be...
		IngentaConnect The Influence of Pedipalp Autotomy on the Courtship and Mating Be...
		The Influence of Pedipalp Autotomy on the Courtship and Mating Behavior of Pardosa milvina (Araneae: Lycosidae)
		Loss of the left pedipalp resulted in significantly less intense courtship, higher female aggression levels, and delayed onset of courtship whereas loss of the right pedipalp minimally affected male and female behavior relative to intact males.
	www.ingentaconnect.com /content/klu/joir/2006/00000019/00000001/00009008 (228 words)

	Pedipalp - The Wordbook Encyclopedia
		Pedipalps of spiders have the same segmentation as the legs, but the tarsus is undivided, and the pretarsus has no lateral claws.
		A male spider bears enlarged ends of his pedipalps, the terminal segments of which are elaborated into organs for the transfer of sperm to the sperm receptacles of the female.
		A microscopic analysis of the pedipalps is often the only way to exactly determine the species of a male spider.
	www.thewordbook.com /Pedipalp (412 words)

	'Chastity belts' block rival sperm in female spiders - life - 06 March 2007 - New Scientist (Site not responding. Last check: 2007-10-28)
		After delivering the sperm, the tip of the pedipalp becomes stuck inside the female, forming a plug in her reproductive tract.
		They therefore concluded that detachment of the pedipalp tip cannot significantly enhance a male spider’s chance of escaping attack by his mate.
		She concludes that the pedipalp plug acts as a chastity belt to prevent sperm from competing spiders from entering the females.
	www.newscientist.com /article/dn11319-chastity-belts-block-rival-sperm-in-female-spiders.html (515 words)

	Spiders - Mating
		Different spiders mate in different positions, but in all cases the aim is to transfer sperm from the male to the female.
		The male does this by inserting the mating organ at the end of its pedipalp (a spine-like structure on tip) carrying the sperm, into the female's reproductive (epigynal) opening on the underside of her body.
		In some species the tip of the pedipalp will break off during mating or a hardened secretion will block the females openings, preventing other males from mating with that female.
	www.austmus.gov.au /spiders/life/mating/mating.htm (211 words)

	The Ultimate Pedipalp - American History Information Guide and Reference
		Pedipalps are a pair of "feelers" on a spider's face.
		They are typically used for grabbing prey and holding it in place as the spider sinks its fangs in.
		Pedipalps are also used for mating by mature male spiders.
	www.historymania.com /american_history/Palp (167 words)

	FNZ44 - Lycosidae (Arachnida: Araneae) - Methods and Conventions
		The male pedipalp and the female epigyne are crucial when identifying lycosids to species (or even to genera).
		The features of the male pedipalp are best viewed by removing the left pedipalp at the junction between the trochanter and the femur and viewed ventrally.
		Some figures of the male pedipalp are slightly tilted to one side to show the differences in the median apophysis (Figs 8, 11, 17, 18, 21, 25).
	www.landcareresearch.co.nz /research/biodiversity/invertebratesprog/faunaofnz/extracts/FNZ44/fnz44met.asp (1053 words)

	Spiders
		Spiders are soft-bodied arachnids with two body parts: the fused head and thorax, called the cephalothorax, and the abdomen, also known as the opisthosoma.
		Pedipalps are not used for locomotion but often assist in touching and maneuvering prey.
		Each male pedipalp is equipped with a special structure that is used to transfer sperm to the female.
	www.desertmuseum.org /books/nhsd_spiders_intro.html (1160 words)

	2" T. Blondi, missing pedipalp question - Arachnoboards
		The pedipalp did not seem to have hairs on it like the other did and generally was not being used much at all.
		Since the molt that pedipalp has grown worse looking, it has never gained the normal coloration of the rest of the T. The end of the palp looks brownish and almost shriveled.
		Yeah, the pedipalp is not going to fully regenerate at the first molt- it takes a couple of molts.
	www.arachnoboards.com /ab/showthread.php?t=43361 (366 words)

	The Scorpion files - Euscorpius identification
		Trichobothria are small sensory hairs that are located on the pedipalps of the scorpions.
		Usually 10-13 trichobothria on the ventral aspect of the pedipalp patella, and 26-29 on its external aspect.
		Usually 11-13 trichobothria on the ventral aspect of the pedipalp patella, and 26-45 on its external aspect.
	www.ub.ntnu.no /scorpion-files/euscorpius_id.htm (809 words)

	World Almanac for Kids
		The next two appendages are pedipalps, rather leglike but generally modified into a kind of feeler.
		In the male the pedipalp bears a peculiar copulatory apparatus called a palpal organ.
		The male’s copulatory organs, however, are complicated structures located on his pedipalps.
	www.worldalmanacforkids.com /explore/animals/spider.html (1196 words)

	All Star Pest Management - Pest Control for Residential and Commercial Properties
		Below the eyes are 2 chelicerae or jaws which end in a hollow fang, connected internally to poison glands, with 1 pedipalp (palp) between chelicerae and 1st pair of legs on each side.
		The abdomen is unsegmented, with a group of fingerlike spinnerets (produce silk) on posterior or rear end.
		Males are usually smaller than females and have the terminal pedipalp segment greatly swollen, and may also differ in coloration.
	www.allstarpestmanagement.com /spiders.shtml (564 words)

	DMNS-Colorado Spider Survey
		the third segment of the leg or pedipalp
		pedipalps and epigyna, or external sexual organs in spiders
		the fourth segment of the leg or pedipalp counting from the tip of the appendage
	www.dmns.org /spiders/glossary.html (377 words)

	Overcoming an evolutionary conflict: Removal of a reproductive organ greatly increases locomotor performance -- Ramos ...
		Note the pedipalps overlap in the two-pedipalp condition (A), whereas the one pedipalp is carried in a central position after pedipalp removal (B).
		pedipalps presents a functional constraint (23), and that the
		The bottom of the box represents the 25th percentile, the dotted line represents the mean, the solid line represents the median, the top of the box represents the 75th percentile, and the whiskers represent the 5th and 95th percentile.
	www.pnas.org /cgi/content/full/101/14/4883 (3589 words)

	Interested in conducting original research on the behavioral ecology of spiders (Site not responding. Last check: 2007-10-28)
		The effects of pedipalp loss on the courtship and mating behavior of Pardosa milvina (Araneae: Lycosidae).
		Pedipalp loss is more common among adult males than females.
		Loss of the left pedipalp resulted in significantly less intense courtship, higher female aggression levels, and delayed onset of courtship compared to males missing the right pedipalp.
	www.susqu.edu /FacStaff/p/persons/ErinLynam.htm (252 words)

	DMNS-Colorado Spider Survey
		pedipalps and epigyna, or external sexual organs in spiders
		male organs used to inject sperm into females; pedipalps are intromittent organs
		the fourth segment of the leg or pedipalp counting from the tip of the appendage
	www.dmnh.org /spiders/glossary.html (377 words)

	pedipalp - OneLook Dictionary Search
		We found 13 dictionaries with English definitions that include the word pedipalp:
		Tip: Click on the first link on a line below to go directly to a page where "pedipalp" is defined.
		pedipalp : The American Heritage® Dictionary of the English Language [home, info]
	www.onelook.com /?w=pedipalp (146 words)

	The Open Door Web Site : Biology : Mating on Land continued
		His pedipalp is often brightly coloured to catch her attention.
		It is important that the female recognizes the male or she will attack him as she would any prey.
		The male carefully approaches the female and positions himself to squirt the packet of sperms from his pedipalp into her sexual opening.
	www.saburchill.com /chapters/chap0033.html (872 words)

	Pedipalp arachnid External link spider sperm Close-up view of sperm-laden pedipalps in a mature tarantula Sources (Site not responding. Last check: 2007-10-28)
		Pedipalp arachnid External link spider sperm Close-up view of sperm-laden pedipalps in a mature tarantula Sources
		They have eight legs and the pedipalp, frequently mistaken for fangs, is actually used to hold prey.
		Note the pedipalps overlap in the two-pedipalp condition (A), whereas the one pedipalp is carried in a central position after...
	en.powerwissen.com /vAnutfAFw9IFKggAYGe%7C%7CSL%7C%7Cxg%3D%3D_Pedipalp.html (264 words)

	Emasculation to plug up females: the significance of pedipalp damage in Nephila fenestrata -- Fromhage and Schneider 17 ...
		the pedipalp (Figure 1) that is anchored to the female's genitals
		The conductor (C) is intact on the right pedipalp but missing on the left side (asterisk).
		pedipalp damage protects the paternity of first males.
	beheco.oxfordjournals.org /cgi/content/full/17/3/353 (2890 words)

	Spiders - About Spiders
		The male's modified pedipalp, used for sperm transfer.
		The droplet is then inducted into the modified pedipalp, rather like the bulb on a fountain pen.
		The sacs are made of silk--softest silk on the inside, toughest on the outside--and can be found in all kinds of places: on leaves, in cracks of bark, or on a web.
	sciencebulletins.amnh.org /biobulletin/biobulletin/story1089.html (163 words)

	Scorpion venom
		To further this hypothesis, we see that in most scorpions, the development of pedipalp is inversely related to the dependency on venom.
		Fattailed scorpion Androctonus australis, the pedipalp is slender while the metasoma is enlarged as the common name suggest.
		The potency is also some of the highest among scorpions and has great propensity to use its sting.It must be justified that the bulbousity of the pedipalp is not in direct inverse relationship with potency.
	members.tripod.com /~c_kianwee/venom.htm (1742 words)

	Uroctonites (Site not responding. Last check: 2007-10-28)
		Members of Uroctonites are further distinguished from other vaejovids except Uroctonus mordax, Uroctonus franckei, Uroctonus grahami, and Vaejovis lindsayi by the absence of prolateral keels on the pedipalp brachium.
		The ventral series of trichobothria on the pedipalp chela is compressed, with the distance between trichobothria Vt and Vst usually equalling less than two-thirds of the distance between Vb and Vsb (
		The ventral series of trichobothria on the pedipalp chela is not as compressed in these species as it is in the western species pair, and the distance between chelal trichobothria Vt and Vst usually equals more than two-thirds the distance between Vb and Vsb (
	www.californiabiota.com /cabiota/uroctonites.htm (695 words)

	paizo.com - Paizo / Messageboards / Dungeon Magazine / Savage Tide Adventure Path / Archives / The Mighty Rhagodessa ... (Site not responding. Last check: 2007-10-28)
		The description for their improved grab says that if they hit with a pedipalp attack, they can attempt to start a grapple as a free action...and can make a bite attack as a free action, with a +4 bonus.
		My impression with the rhagodessas was that they could use their Improved Grab attack upon opponents of equal size, but there's nothing in the text to support this, so feel free to assume that they're limited to using it against Small or smaller foes.
		The free bite attack comes after the rhagodessa successfully starts a grapple as part of its pedipalp attack, and it can't start a grapple on a creature it's already grappling.
	paizo.com /paizo/messageboards/dungeon/savageTide/theMightyRhagodessaSomeSpoilers (1886 words)

	paizo.com - Dungeon / Messageboards / Savage Tide Adventure Path / Archives / Rhagodessa's attacks - rules advice needed (Site not responding. Last check: 2007-10-28)
		Instead of attacking with a pedipalp, can he choose to just make a bite attack (at +5) as a standard action when the target is not grappled, even though this is his secondary attack?
		It could definitely move in, hit with a pedipalp, start a grapple as a free action, make a bite attack, release its prey, and then retreat back away from counter attacks.
		Which does beg the question of whether taht second pedipalp can be used for anything while grappling or not (such as making it tougher for a grappled opponent to escape, for instance).
	paizo.com /dungeon/messageboards/savageTide/rhagodessasAttacksRulesAdviceNeeded&page=1 (2965 words)

	Buzzwords: A Glossary of Minbeast Terms (Site not responding. Last check: 2007-10-28)
		Amblypygi [am-bleh-PIE-gee] an order of the class Arachnida, comprised of the tailless whipscorpions, which are characterized by a broad cepahalothorax, prominent pincerlike pedipalps, and a first pair of legs that are long an whiplike.
		Pedipalp [ped-ee-palp] one of a pair of hooklike appendages on a spider's cephalothorax, roughly equivalant to an insect's mandibles.
		The abdomen is formed into a long tail with a stinger at the tip; common examples of scorpions include bark scorpions, hairy scorpions, forest scorpions, and emperor scorpions.
	members.aol.com /YESedu/glossary.html (8787 words)

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