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Topic: Prosoma

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	ARACAJU - LoveToKnow Article on ARACAJU (Site not responding. Last check: 2007-11-03)
		Tartarides.Small degenerate forms with the dorsal a of the prosoma furnished with two shields, a larger in front Tering the anterior four somites, and a smaller behind covering 5th and 6th somites; the latter generally subdivided into a ht and left portion.
		Prosoma as ~n the Mygalomorphae, except that the isosternal area is long and narrow.
		66 to 69).Dorsal a of prosoma covered with three distinct plates, two smaller iresenting the terga of the 5th and 6th somites, and a larger resenting those of the anterior four somites, although the reduced ga of the 3rd and 4th are traceable behind the larger plate.
	42.1911encyclopedia.org /A/AR/ARACAJU.htm (19386 words)

	Prosoma - Wikipedia
		Mit den Begriffen Prosoma oder Cephalothorax bezeichnet man den Vorderleib bei Spinnentieren.
		An ihm sitzen die Augen der Tiere, ihre paarigen Mundwerkzeuge (die Cheliceren und Pedipalpen) sowie 8 Beine.
		Im Gegensatz zu den Insekten, deren Körper in drei Abschnitte - Kopf, Thorax (Brust) und Abdomen (Hinterleib) - gegliedert ist, zeigen Spinnentiere einen zweigegliederten Körperbau: Als Vorderleib besitzen sie das Prosoma, das einem Kopfbruststück entspricht (daher auch Cephalothorax genannt), und den Hinterleib (Opisthosoma).
	de.wikipedia.org /wiki/Prosoma (80 words)

	Chelicerata (Site not responding. Last check: 2007-11-03)
		In the Chelicerata, the body is divided into an anterior prosoma (or cephalothorax) composed of eight segments plus a presegmental acron and a posterior opisthoma (or abdomen) composed of twelve segments plus a postsegmental telson.
		As in other arthropods the mouth lies between the second and third segments, but whereas in other groups there is usually a pair of antennae on the last preoral segment, here there are none.
		The legs on the prosoma are either uniramous or have a very reduced gill branch, and are adapted for walking or swimming.
	www.serebella.com /encyclopedia/article-Chelicerata.html (430 words)

	Maryland Horseshoe Crabs
		On further examination, the several eyes are found on the exterior of the prosoma.
		Opisthosoma (abdomen) — The abdomen is the center section of the shell and attaches to the cephalothorax using a hinge.
		Towards the front of the prosoma is a small ridge with three dark spots.
	www.dnr.state.md.us /education/horseshoecrab/anatomy.html (895 words)

	ENY 4354-5355 Insect Morphology - Subphylum Chelicerata (Site not responding. Last check: 2007-11-03)
		first pari of appendages (the chelicerae) on the prosoma are adapted for feeding.
		head and thorax of merostomates are fused into a single functional unit, the prosoma (forward body) or cephalothorax and are covered with a single unjointed sheet of exoskeleton (carapace).
		The arachnid abdomen, or opisthsoma, is generally distinct from the prosoma; in some arachnids, including the spiders, the 2 divisions are connected by a narrow stalk called a pedicel, which increases the range of motion of the abdomen (useful for spinning webs).
	www.famu.org /academics/hubbard/morphology/subphyl_chelicerata.asp (251 words)

	Chelicerata
		Aceste artropode au corpul divizat în: prosoma (cefalotorace) şi opistosoma (abdomen).
		Prosoma poate fi unită cu opistosoma printr-un peduncul (Araneae) sau pe o suprafaţă largă (scorpioni, merostomate), ori fuzionate într-o singură piesă (acarieni).
		Prosoma este compusă din şase segmente prevăzute fiecare cu câte o pereche de apendice articulate.
	www.animalia.go.ro /Arthropoda/Chelicerata/Chelicerata.html (211 words)

	skorpione.de - Zuhair S. Amr + Mohammad Abu Baker: The Scorpions of Jordan - (Site not responding. Last check: 2007-11-03)
		They are one of the most ancient animals, and perhaps they appeared about 350 million years ago during the Silurian period, where they invaded terrestrial habitats from an amphibious ancestor (Vachon 1953).
		Scorpions are characterized by their elongated and segmented body that consists of the cephalothorax or prosoma, abdomen or mesosoma and tail or the metasoma.
		Diagnosis : Light yellow in color, prosoma smooth except for small granules in front of the ocular crest and lateral eyes.
	www.skorpione.de /htm/gastautoren/z_amr/z_amr.htm (2593 words)

	Prosoma, Portfolio
		A Prosoma foi fundada em 1969, época em que chegavam ao Brasil os primeiros computadores de 2ª geração.
		Desde então, a Prosoma vem se adaptando à crescente evolução da tecnologia, criando soluções para armazenamento, tratamento e disseminação da informação.
		Atualmente a Prosoma tem atuado diretamente na área de projetos de centros de conhecimento (Knowledge Centers) para disseminação da informação corporativa, utilizando ferramentas de ponta para construção de infobases, bancos de imagens, digitalização e OCR (Reconhecimento Óptico de Caracteres) de documentos.
	www.prosoma.com.br /portfolio (213 words)

	The Cactus Worms (Phylum Priapula)
		The prosoma can be drawn into the trunk which is why it is sometimes called the introvert.
		They move through the mud using the spines on the prosoma and the prosoma's ability to be withdrawn into the body.
		Priapulids are all believed to be predators feeding on smaller worms they find in the mud, but some species such as those in the recently discovered order Seticoconaria live sedentary lives and have a crown of stiff tentacle-like spines, and may therefore feed on anything that falls into this crown.
	www.earthlife.net /inverts/priapula.html (868 words)

	Development -- Stollewerk et al. 128 (14): 2673 Figure IG9
		The staining in the anterior-most lateral region that was visible in the prosoma and the first opisthosomal hemisegments before can now be seen in opisthosomal segments o2 to o4 (L).
		The former CsASH1 expression has disappeared in the prosoma and the first opisthosomal segment and a new medial expression domain is visible (I, arrow in S).
		The expression pattern in the opisthosoma reflects that seen before in the prosoma (N).
	dev.biologists.org /cgi/content-nw/full/128/14/2673/FIG9 (326 words)

	Micrographia: Terrestrial Spiders: Introduction with Photomicrographs of Spiders.
		The prosoma bears six pairs of appendages: the chelicera (jaws), the pedipalps, and four pairs of legs.
		A spider which is ready to moult usually finds a quiet place to hang by its claws, and by increasing the blood pressure in the prosoma, causes the old cuticle to crack in a line which runs around the prosoma above the level of the legs, and below the eyes.
		Between the two parts of the prosoma is the shrivelled remnant of the cuticle which once covered the opisthosoma (abdomen).
	www.micrographia.com /specbiol/chelicer/spidterr/spidt0100.htm (819 words)

	Morphology of the Eurypterida (Site not responding. Last check: 2007-11-03)
		The prosoma of eurypterids is both the head and forebody of the animal.
		The dorsal (top) side of the prosoma is a single plate from which protrude two compound eyes at the sides, and two smaller ocelli (simple eyes) from the top central portion.
		The ventral (belly) side of the prosoma may be a single shield-like plate or many small plates.
	www.ucmp.berkeley.edu /arthropoda/chelicerata/eurypteridmm.html (515 words)

	Horseshoe crab biology
		The prosoma is the front, semicircular part of the horseshoe crab and combines the head and thorax under a hard shell or exoskeleton.
		The opisthosoma is attached to the prosoma with a hinge.
		Two large compound eyes are located on the prosoma, with other light receptors scattered all over the body.
	www.ocean.udel.edu /horseshoecrab/History/biology.html (708 words)

	Scorpion morphology
		The scorpion's body, like that of the spider, is divided into two main sections, the prosoma (cephalothorax) and the opisthosoma (abdomen).
		The prosoma is the anterior (front) section covered dorsally (on top) by a hard sclerotized plate called the carapace.
		The 8 eyes (varies from 0 - 10, depending on family, genus and species) are situated, in 3 groups, on the carapace; a median pair and two lateral groups of three.
	www.museums.org.za /bio/scorpions/morphology.htm (496 words)

	Natural History & Education > Life in Freshwater > Freshwater Animals and Plants > Animals > ... (Site not responding. Last check: 2007-11-03)
		Appendages of the prosoma are the chelicerae, pedipalps (might be used for walking) and 4 or more pairs of walking legs.
		Prosoma and abdomen are distinct in spiders and fused in ticks and mites.
		The final four pairs of appendages on the prosoma are walking legs.
	193.43.36.89 /id/5063 (375 words)

	4Reference \|\| Chelicerata (Site not responding. Last check: 2007-11-03)
		Pycnogonida - subphylum and one of the major subdivisions of the arthropods, including the arachnids, horseshoe crabs, and related forms.
		In these the body is divided into an anterior prosoma (cephalothorax), composed of eight segments plus a presegmental acron that usually has eyes, and a posterior opisthoma (abdomen) composed of twelve segments plus a postsegmental telson.
		The appendages on the prosoma are as follows: #None #None #Chelicerae (pinchers) #Legs or pedipalps #Legs #Legs #Legs #Legs The chelicerae, which give the group its name, are pointed appendages that grasp the food in place of the chewing mandibles most other arthropods have.
	www.4reference.net /encyclopedias/wikipedia/Chelicerata.html (339 words)

	Ricinulei (Site not responding. Last check: 2007-11-03)
		The pedipalps end in pincers that are small relative to their bodies, when compared to those of the related orders of scorpions and pseudoscorpions.
		The heavy-bodied abdomen forms a narrow pedicel, or waist, where it attaches to the prosoma.
		In males, the third pair of legs are modified to form copulatory organs.
	www.wikiverse.org /ricinulei (232 words)

	Superclass Chelicerata (Site not responding. Last check: 2007-11-03)
		In most, the body is divided into two tagmata; the anterior prosoma and the posterior opisthosoma.
		In most, body divided into two tagmata, the prosoma and opisthosma, anterior and posterior respectively.
		Prosoma large, abdomen with variable number of segments (Moore, 1955).
	www.cox-internet.com /coop/chelicerata.html (291 words)

	Arthropoda
		Unsegmented prosoma generally covered dorsally by a solid carapace.
		Chelicerae composed of a fang and and basal segment.
		Globose abdomen unsegmented and connected to prosoma by a narrow pedicel.Spinnerets at posterior end of abdomen.
	www.emporia.edu /biosci/invert/lab6/index.htm (415 words)

	Chelicerata (Site not responding. Last check: 2007-11-03)
		In the Chelicerata, the body is divided into an anterior prosoma (or cephalothorax) composed of eight segments plus a presegmental acron and a posterior opisthoma (or abdomen) composed of twelvesegments plus a postsegmental telson.
		As in other arthropods the mouth lies between the second and thirdsegments, but whereas in other groups there is usually a pair of antennae on the last preoral segment, here there are none.
		The legs on the prosoma are either uniramous or have a very reduced gill branch, and are adapted for walking orswimming.
	www.therfcc.org /chelicerata-169856.html (317 words)

	The spiders body
		The eight legs, the two jaws (chelicera) and the two feelers (palps) are connected to the prosoma.
		On the prosoma there are usually eight eyes.
		The brains are located in the prosoma and the heart at the front upper side of the abdomen (red).
	www.xs4all.nl /~ednieuw/Spiders/InfoNed/body.html (290 words)

	The Arthropods (Chapter 14) (Site not responding. Last check: 2007-11-03)
		Defining Characteristics: 1) absence of antennae; 2) body divided into 2 distinct portions (the prosoma and the opisthosoma), with no distinct head; 3) first pari of appendages (the chelicerae) on the prosoma are adapted for feeding.
		From 0 to 4 pairs of eyes are found on the prosoma, with 4 pairs being most common.
		The anteriormost appendages of the prosoma are the chelicerae, followed by the pedipalps, which are variously modifed for grabbing, killing, or reproducing and ins some species may have a sensory function as well.
	bama.ua.edu /~clydeard/bsc376/lecture29.htm (1320 words)

	Anatomy
		There are three divisions to the body of the horseshoe crab: the prosoma, the opisthosoma, and the telson.
		The prosoma contains a sizeable intestinal tract with an esophagus and proventriculus (used to grind food), a nervous system concentrated into a bulbous brain, a tubular heart, excretory glands at the bases of the walking legs and connective tissue and cartilagenous plates.
		The opithosoma contains chiefly the musculature for the operation of the book gills and the telson, though the horseshoe's 113 distinct muscle groups (comprising over 750 individual muscles) are not limited to this section of the body.
	www.horseshoecrab.org /anat/anat.html (164 words)

	Palaeos Invertebrates : Arthropoda : Eurypterida : Eurypterida (Site not responding. Last check: 2007-11-03)
		As with horseshoe crabs, the prosoma is both the head and thorax of the animal.
		The upper or dorsal side of the prosoma is equipped with two prominent kidney-shaped compound eyes, and in the middle a pair of small
		The prosoma is actually made up of the first six exoskeleton segments, which have been fused together.
	www.palaeos.com /Invertebrates/Arthropods/Eurypterida/Eurypterida.htm (1757 words)

	Palaeos Invertebrates: Arthropoda: Xiphosusura: Xiphosura (Site not responding. Last check: 2007-11-03)
		The compound eyes are small (and absent in some early forms), and there are six pairs of legs (in the living Limulus) but no antennae.
		These late surviving forms seem to be among the most primitive of the Synziphosurida, or in any case they represent a side branch away from the main axis of Xiphosuran evolution.
		Small elongate forms, ornamented prosoma, abdomen with broad axis, 9 free segments, post-abdomen with 3 or 4 segments.
	www.palaeos.com /Invertebrates/Arthropods/Xiphosura/Xiphosura.htm (1659 words)

	European Journal of Entomology
		A combination of light and electron microscopy were used to precisely characterize and classify the cuticular layers in oribatid mites and show how they differe in mites and other arthropods.
		In Rhysotritia duplicata the cuticle of the aspis (upper shield of the prosoma) differs significantly from that of the opisthosoma.
		There were no structural differences in the cuticle of the prosoma and opisthosoma of species of the superfamily Phthiracaroidea (Phthiracarus, Steganacarus and Tropacarus) in spite of the differences in external apparence.
	www.eje.cz /scripts/viewabstract.php?abstract=968&browsevol=102%281%29 (192 words)

	Histology of Salticid Spiders
		Internal anatomy, histology, or histochemistry of spiders can be studied with a variety of techniques, several of which are depicted here.
		Figure 10.1 Transverse section of prosoma of sixth instar Phidippus johnsoni, stained with Masson Trichrome.
		The advantage of this method over Bodian silver impregnation is that it reveals individual nerve fibers, which can be followed in three dimensions through a 0.08 mm thick section.
	www.users.qwest.net /%7Ephidippus/page10.htm (569 words)

	Encyclopedia: Chelicerata
		Orders many, all extinct The eurypterids were the largest known arthropods that ever lived.
		The appendages on the segments of the prosoma are as follows: In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals.
		The cephalothorax is an anatomical term used of arachnid and malacostracan arthropods for the first major body section.
	www.nationmaster.com /encyclopedia/Chelicerata (1295 words)

	De spin lichaam (Site not responding. Last check: 2007-11-03)
		Het stevige met chitine beklede kopborststuk (prosoma of cephalothorax) en het zachte achterlijf (abdomen of opisthosoma) worden door een smalle buis (pedicel) met elkaar verbonden.
		Verder zijn er nog twee kaken (cheliceren) en twee tasters (palpen) met, bij de mannetjes, aan het eind hiervan een bulbus wat gevuld kan worden met zaad die mannetjes gebruiken om het sperma bij de vrouw in te brengen.
		Op de prosoma bevinden zich meestal acht ogen.
	www.xs4all.nl /~ednieuw/Spiders/InfoNed/lichaam.html (250 words)

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