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| | Arthropod - Wikipedia, the free encyclopedia |
 | | These organisms have two body regions, ten jointed appendages, simple eyes, and often carry on respiration by means of book lungs. | | | There are five main subgroups: the Trilobita, Chelicerata, Myriapoda, Hexapoda, and Crustacea, which may be variously ranked from subphyla to classes, with various other taxa introduced above or below them and corresponding changes in the ranks of their subgroups. | | | The arthropod group identified with the subphylum Chelicerata is the class Arachnida. |
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http://en.wikipedia.org/wiki/Arthropod
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| | Lab 7: PHYLUM ARTHROPODA |
| | The head and thorax are fused into a single cephalothorax bearing all 6 pairs of appendages. | | | The second pair of arachnid appendages are called pedipalps, variously modified for grasping, sperm transfer and sense perception. | | | The appendages of a single individual are referred to as serially homologous. |
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http://www.biosci.ohiou.edu/introbioslab/bios173/173_7.htm
(557 words)
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| | Nearctica - Natural History - Chelicerata - Spiders |
| | This site is a very nice, non-technical introduction to some of the common or more interesting spiders found in Missouri. | | | Nearctica - Natural History - Chelicerata - Spiders | | | Answers to frequently asked questions about tarantulas and information about their handling and care. |
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http://www.nearctica.com/nathist/chelic/spider.htm
(386 words)
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| | [No title] |
| | Body segments are fused into 2 segments: __________________ and __________________. | | | Subphylum Chelicerata Chelicerates such as __________________ and __________________ have modified their most anterior pair of appendages into feeding structures called ________________________ ; the second pair of appendages are __________________. | | | The external skeleton or __________________ is made of __________________. |
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http://www.dmacc.cc.ia.us/instructors/tmbergin/biol142labex38.doc
(526 words)
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| | ARACHNOLOGY - PALEONTOLOGY |
| | Fossil reveals world's oldest genitals The discovery of the world's oldest genitals proves that little has changed over the last 400 million years - at least for daddy-long-legs. | | | Fossil Groups and Evolution of Chelicerata Chelicerate groups known only from fossils. | | | Fossil Chelicerata Palaeontological Museum, University of Oslo, Norway (in English and Norwegian) (Norway) |
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http://www.arachnology.be/pages/Paleontology.html
(518 words)
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| | [No title] |
| | The Delightful World of the Chelicerata (Mites, Spiders, Scorpions etc.) | | | A collection of essays and poetry suitable for all the family to read, quarranteed to amuse and stimulate you. | | | If you want to know more about me here I am. |
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http://www.earthlife.net/begin.html
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| | Arthropoda |
| | Arachnomorpha Heider 1913 = Trilobita + Pycnogonida + other Chelicerata | | | Phylogeny of Arachnomorph Arthropods and the Origins of the Chelicerata. | | | The principal alternative view is the so-called APT hypothesis that the Crustacea form a clade with the Trilobita plus the Chelicerata. |
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http://www.peripatus.gen.nz/Taxa/Arthropoda/Index.html
(4669 words)
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| | Fossil chelicerates and evolution of Chelicerata |
| | Chelicerata can be seen to be set within a wider 'Arachnomorph' grouping, which includes Cambrian forms such as the aglaspids. | | | Future work may be expected to modify some of these relationships, and confirm or deny hypotheses such as a eurypterid ancestry for terrestrial scorpions. | | | Chasmataspids and eurypterids are now extinct, as are several other fossil groups which have been placed as 'sister taxa' to Chelicerata. |
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http://palaeo.gly.bris.ac.uk/Palaeofiles/Fossilgroups/Chelicerata/fossils.html
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| | PROTEROSTOMES |
| | Also, the chelicerata may be a sister group to the trilobites. | | | The question of the relationship of the Pycnogonids with the Chelicerates has yet to be resolved, and they may be separated into different subphyla. | | | The chelicerate body is made of two major body regions: the prosoma (cephalothorax) and opisthosoma (abdomen). |
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http://comenius.susqu.edu/bi/202/Animals/EU-PROTOSTOMES/chelicerata/Chelicerata.html
(491 words)
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| | Chelicerata - Wikipedia, the free encyclopedia |
| | Sanctacaris, and perhaps the aglaspids, may also belong here. | | | 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. | | | They may have diverged from the other chelicerates early on, or represent highly modified forms. |
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http://www.wikipedia.org/wiki/Chelicerata
(345 words)
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| | Subphylum Chelicerata (Spiders and their kin) |
| | The Chelicerata, which I have called a subphylum here for convenience, but which is just as well called a phylum in some texts, is an extremely ancient group of arthropods, including the extinct Eurypterida. | | | The Chelicerata contain more about 80,000 species known to science most of which are Arachnids divided almost evenly between the spiders and the mites. | | | The inclusion of the class Pycnogonida in the Chelicerata is generally accepted but not scientifically proven, the fossil record for pycnogonids is very scant and they differ in many ways from the other chelicerates. |
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http://www.earthlife.net/chelicerata/chelicerata.html
(459 words)
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| | Palaeos Invertebrates: Arthropoda: Arachnomorpha |
| | According to Dunlop and Selden the Strabopida are the most primitive of the Arachnomorpha, and could have given rise to both chelicerates and aglaspidids. | | | As such, "Arachnomorpha" or "Arachnata" constitutes a broad taxon that includes the Trilobites, the Chelicerata and a number of primitive Cambrian to Devonian forms that are usually included in the Trilobitomorpha or the Xiphosura. | | | Hou & Bergström, 1997 use the Superclass Lamellipedia, which seems to be pretty much the same as Arachnomorpha (Trilobita + Chelicerata + assorted basal forms). |
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http://www.palaeos.com/Invertebrates/Arthropods/Arachnomorpha.html
(884 words)
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| | Arthropods at the Cofrin Center for Biodiversity |
| | The other subphylum, Chelicerata, have mouthparts called chelicerae, which are either fang-like or pincer-like in form. | | | These animals all have mouthparts called mandibles, which are jaw-like structures that work against one another (although these mandibles have evolved into bizarre and very un-jawlike structures in some groups). | | | As their classification indicates, horseshoe crabs are not related to "true" crabs at all. |
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http://www.uwgb.edu/biodiversity/biota/arthropods/Chelicerata.htm
(697 words)
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| | Nearctica - Natural History - Chelicerata - General |
| | The Chelicerata are a large and very diverse group of the arthropods. | | | Nearctica - Natural History - Chelicerata - General | | | The Arachnida contain the largest and most diverse collection of groups in the Chelicerata and include the spiders, mites, ticks, scorpions, and other less well known groups. |
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http://nearctica.com/nathist/chelic/chelic.htm
(580 words)
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| | McGraw-Hill AccessScience: Chelicerata |
| | The Chelicerata can be defined as those arthropods with the anteriormost appendages as a pair of small pincers (chelicerae) followed usually by pedipalps and four pairs of walking legs, and with the body divided into two parts: the prosoma (corresponding approximately to the cephalothorax of many crustaceans) and the opisthosoma (or abdomen). | | | The Chelicerata comprise three classes: the enormous group Arachnida (spiders, ticks, mites, scorpions, and related forms); the Pycnogonida (sea spiders or nobody-crabs); and the Merostomata (including the extant Xiphosurida or horseshoe crabs). |
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http://dx.doi.org/10.1036/1097-8542.126200
(158 words)
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| | Palaeos Invertebrates: Arthropoda: Chelicerata |
| | Finally, there is a little-known group of arthropods that may be Chelicerates, but are only very distantly related to all other forms (they have even been placed on occasion in a separate phylum!) the pycnogonids or "sea spiders". | | | Treatise on Invertebrate Paleontology - Part P: Arthropoda 2: Chelicerata | | | The Chelicerata are distinguished by the absence of antennae, and the presence of fangs or |
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http://www.palaeos.com/Invertebrates/Arthropods/Chelicerata.htm
(508 words)
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| | The Acari |
| | Many species are thus responsible for either the formation of galls in plants or the transmission of disease in both plants and larger animals, in fact the Mites, particularly the Ticks transmit more diseases than any other comparable invertebrate group. | | | For example the Astigmata tend to go through all 6 stases but the prelarva and the deuteronymph are non-feeding, the deuteronymph being a dispersal stage with special adaptations for 'hitch-hiking (see below) in many species; while the Ticks (Ixodida) pass through only three stases. | | | Some Mites are unusual in that they can take in and digest solid food, (the only members of the Chelicerata which can) though most only feed on liquids i.e. |
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http://www.earthlife.net/chelicerata/acari.html
(739 words)
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| | [No title] |
| | They have 6 pairs of appendages (1 pair of pedipalps, 1 pair of mouthparts, 4 pairs of legs). | | | Feed on plants and decaying material PHYLUM ARTHROPODA Sub-Phylum: Chelicerata Chelicerae Class: Arachnida ARACHNIDS Spiders, mites, ticks, scorpions, and others do NOT possess antennae. |
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http://www.umass.edu/ent/faculty_staff/hollingsworth/documents/Arthropods_000.doc
(251 words)
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| | ss10a |
| | Describe the defining characteristics of Onychophora, Trilobita, and Chelicerata, as well as of the three classes Meristomata, Pycnogonida, and Arachnida. | | | Identify the following structures on a specimen of Limulus: prosoma, opisthosoma, carapace, eyes (compound and median), telson, chelicera, pedipalps, legs (know functions of different legs as well as differences between them), gnathobases, flabellum, operculum, book gills, mouth, anus. |
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http://www.ou.edu/class/invert/ss10a.htm
(162 words)
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| | Lab 4 – Ecdysozoa - Arthropoda |
| | The Xiphosura differ from all other Chelicerata in having compound eyes. | | | There are approximately 86,000 described species of Chelicerata. | | | Traditionally the phylum Arthropoda has been divided into 4 subphyla: the Trilobita (extinct), Uniramia (insects), Chelicerata (spiders and scorpions), and Crustacea (crabs, shrimp). |
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http://userwww.sfsu.edu/~efc/classes/biol170/lab/Laboratory4.htm
(1259 words)
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| | nomina circumscribentia insectorum: O |
| | Pantopoda + part of Monomerosomata + Anepignathi + Pseudoscorpionida (in Chelicerata |
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http://www.bio.pu.ru/win/entomol/KLUGE/nom/-nom-O.htm
(53 words)
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| | A Brief Overview of the Arthropods |
| | Most uniramians breathe using a tracheal system, comprised of spiracles, tracheae and tracheoles. | | | They are grouped into three main subphyla: Uniramia, Chelicerata and Crustacea. | | | All arthropods are believed to have descended from a common ancestor, the annelids, more commonly called segmented worms. |
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http://www.uni.uiuc.edu/~dstone/introtoarthropods.html
(241 words)
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| | : Zoology/Subphylum_Chelicerata |
| | Subphylum Chelicerata - Links to the classes Merostomata, Pynogonida, and Arachnida. | | | Links to the fossil record, life history and ecology, systematics, and morphology. |
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http://www.mhhe.com/links/pages/Zoology/Subphylum_Chelicerata
(58 words)
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| | Biology Of Arthropods Guide |
| | These names have come into current use based on a better understanding of evolutionary relationships among arthropods. | | | They replace older class level names such as Arachnida (now Chelicerata), Myriapoda, Onychophora and Insecta. | | | Myriapods, Onychophorans, and Insects share a common ancestor that had unbranched appendages and a single pair of antenna and so are now placed in an evolutionary branch--the Uniramia (uni-one, ramus-branch). |
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http://ebiomedia.com/prod/BOarthropods.html
(1706 words)
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| | Chelicerata |
| | It uses material from the wikipedia article Chelicerata. |
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http://www.eurofreehost.com/ch/Chelicerata_2.html
(118 words)
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| | Merriam-Webster Online |
| | chelicerata is one of more than 1,000,000 entries available at Merriam-WebsterUnabridged.com. | | | For More Information on "chelicerata" go to Britannica.com | | | Get the Top 10 Search Results for "chelicerata" |
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http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=Chelicerata
(55 words)
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| | BioFinder Category Search |
| | Chelicerata < Arthropoda < System < Zoology < Biology | | | Submit a new link or a new image for this category: | | | Endlich ist es warm draußen Das freut nicht nur die Menschen, sondern auch die Zecken, die jetzt nach ihrer Winterruhe unter den Steinen hervorkrabbeln und sich auf die Suche nach ihrer nächsten Blutmahlzeit begeben. |
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http://caliban.mpiz-koeln.mpg.de/~stueber/BioSearch/bioinfo/searchtheme.cgi?themeid=857
(93 words)
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| | Books : Mites (Chelicerata: Acari) parasitic on birds in Hawaii Volcanoes National Park ;: Distribution of mosquitos ... |
| | Offer your visitors a co-branded guides and outfitters directory. | | | Mites (Chelicerata: Acari) parasitic on birds in Hawaii Volcanoes National Park ;: Distribution of mosquitos (Diptera: Culicidae) on the east flank of... | | | Home / Shop / Books : Mites (Chelicerata: Acari) parasitic on birds in Hawaii Volcanoes National Park ;: Distribution of mosquitos (Diptera: Culicidae) on the east flank of... |
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http://www.theoutdoorlodge.com/cgi-bin/shop/amazon/amazon.cgi?item_id=B0006XFG0U&search_type=AsinSearch&locale=us
(184 words)
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| | arthropods |
| | Chelicerata includes Merostomata (horseshoe crabs), and Arachnida (spiders, scorpions, mites, and relatives) (617-618) | | | Most living arthropods (crabs, lobsters, scorpions, spiders, insects) - classified into one of 3 major taxa: Chelicerata, Crustacea, and Uniramia. |
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http://www.sci.sdsu.edu/classes/biology/bio201/hanscom/arthro.html
(275 words)
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| | The World Spider Catalog, V6.0 by N. I. Platnick © 2000 — 2005 AMNH |
| | First Mesozoic mygalomorph spiders from the Lower Cretaceous of Siberia and Mongolia, with notes on the system and evolution of the infraorder Mygalomorphae (Chelicerata: Araneae). | | | Hunan Science and Technology Publishing House, 256 pp. |
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http://research.amnh.org/entomology/spiders/catalog/BIB7.html
(8384 words)
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| | BIO3324 Lecture: Protozoa |
| | Not all of these new forms of Chelicerates were predatory and species also feed on plants as well. | | | Like the other highly successful arthropod, the insect, the Chelicerata also have a waterproofed | | | University of California Museum of Palentology, visit the |
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http://salinella.bio.uottawa.ca/bio2125/Lectures/BIO2125_lcts_Arthro_Chelic.htm
(546 words)
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| | Lourenço |
| | Considérations taxonomiques sur Le genre Chiromachetes Pocock, 1899 (Chelicerata, Scorpiones, Ischnuridae) | | | The two species are only known from the south of India. |
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http://www.mnhn.fr/publication/zoosyst/z97n1a6.html
(116 words)
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| | BIODIDAC - Animalia Arthropoda Chelicerata Limulus - CHEL034P.GIF |
| | Detailed view of the ventral surface of the horse shoe crab showing the attachment of the appendages to the body. | | | Detailed view of the ventral surface of the horse shoe crab showing the attachment of the appendages to the body.]" width="500" height="383"> | | | BIODIDAC - Animalia Arthropoda Chelicerata Limulus - CHEL034P.GIF |
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http://biodidac.bio.uottawa.ca/Thumbnails/CHEL034P-GIF.htm
(110 words)
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| | ADW: Chelicerata: Information |
| | Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. | | | We have more information on the subgroups of chelicerates, use the Classification tab to find them. | | | To cite this page: Myers, P. "Chelicerata" (On-line), Animal Diversity Web. |
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http://animaldiversity.ummz.umich.edu/arthropoda/chelicerata.html
(185 words)
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