1. Arthropod - Wikipedia, The Free Encyclopedia Phylogeny of arthropoda inferred from mitochondrial sequences Strategies The position of crustaceans within arthropoda — Evidence from nine molecular http://en.wikipedia.org/wiki/Arthropod

Arthropod From Wikipedia, the free encyclopedia Jump to: navigation search Arthropod Fossil range: Cambrian or earlier - Recent Mexican redknee tarantula Brachypelma smithi Scientific classification Kingdom: Animalia Superphylum: Ecdysozoa Phylum: Arthropoda Latreille Subphyla and Classes Subphylum Trilobitomorpha Trilobita - trilobites (extinct) Subphylum Chelicerata Arachnida spiders scorpions , etc. Merostomata horseshoe crabs , etc. Pycnogonida - sea spiders Eurypterida - sea scorpions (extinct) Subphylum Myriapoda Chilopoda centipedes Diplopoda ... Symphyla Subphylum Hexapoda Insecta - insects Collembola - springtails Diplura Protura Subphylum Crustacea Branchiopoda brine shrimp etc. Remipedia Cephalocarida – horseshoe shrimp Maxillopoda barnacles fish lice , etc. Ostracoda – seed shrimp Malacostraca lobsters crabs shrimp , etc. Arthropods Phylum Arthropoda , from Greek arthron joint ", and podos foot ") are the largest phylum of animals and include the insects arachnids crustaceans , and others. Arthropods are characterized by the possession of a segmented body with appendages on at least one segment. They have a

2. Introduction To The Arthropoda The Arthropods, the largest animal phylum, includes insects, spiders, crustaceans, and others. Information from UCBerkeley website. http://www.ucmp.berkeley.edu/arthropoda/arthropoda.html

Introduction to the Arthropoda . . . the REAL rulers of the Earth. . . B y nearly any measure, the most successful animals on the planet are the arthropods. They have conquered land, sea and air, and make up over three-fourths of all currently known living and fossil organisms, or over one million species in all. Since many arthropod species remain undocumented or undiscovered, especially in tropical rain forests, the true number of living arthropod species is probably in the tens of millions. One recent conservative estimate puts the number of arthropod species in tropical forests at 6 to 9 million species (Thomas, 1990). Arthropods range in distribution from the deep sea to mountain peaks, in size from the king crab with its 12-foot armspan to microscopic insects and crustaceans , and in taste from chocolate covered ants to crawfish jambalaya and lobster Newburg. Despite this unbelievable diversity, the basic body plan of arthropods is fairly constant. Arthropods have a stiff cuticle made largely of chitin and proteins, forming an exoskeleton that may or may not be further stiffened with calcium carbonate. They have segmented bodies and show various patterns of segment fusion (

3. Arthropoda Phylogeny, bibliography, and links from the Tree of Life Project. http://www.tolweb.org/Arthropoda

Temporary Page Containing Groups Bilateria Animals Eukaryotes Life on Earth Other Bilateria Deuterostomia Arthropoda Onychophora Tardigrada Nematoda Nematomorpha ... Brachiopoda Subgroups Hexapoda Crustacea Pauropoda Diplopoda ... Trilobites Arthropoda This tree diagram shows the relationships between several groups of organisms. The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right. You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species. For more information on ToL tree formatting, please see Interpreting the Tree or Classification . To learn more about phylogenetic trees, please visit our

4. ADW: Arthropoda: Information Philip Myers s introduction to Phylum arthropoda, from the Animal Diversity Web. http://animaldiversity.ummz.umich.edu/site/accounts/information/Arthropoda.html

Overview News Technology Conditions of Use ... Home Kingdom Animalia Phylum Arthropoda Phylum Arthropoda crustaceans, insects, spiders, and relatives Information Pictures Specimens Sounds ... Classification editLink('skunkworks/.accounts/200310302028') 2008/03/16 02:11:49.491 GMT-4 By Phil Myers Kingdom: Animalia Phylum: Arthropoda Members of this Phylum Arthropods include an incredibly diverse group of taxa such as insects, crustaceans, spiders, scorpions, and centipedes. There are far more species of arthropods than species in all other phyla combined, and the number of undescribed species in the largest assemblage of arthropods, the insects, probably numbers in the tens of millions. Members of the phylum have been responsible for the most devastating plagues and famines mankind has known. Yet other species of arthropods are essential for our existence, directly or indirectly providing us with food, clothing, medicines, and protection from harmful organisms. The systematic relationships of arthropod groups is not fully understood, which is not surprising given the size and diversity of the phylum. Sources Hickman, C.P. and L. S. Roberts. 1994.

5. Arthropoda This page presents a brief overview of the arthropoda, from their origins to the present. http://www.peripatus.gen.nz/Taxa/Arthropoda/Index.html

Peripatus Home Page Biology Taxa Updated: 30 Jul 2006 Arthropoda Abstract This page presents a brief systematic overview of the Arthropoda, from their origins to the present. Keywords: Arthropoda, arthropod, Ecdysozoa, Tactopoda, Onychophora, Euarthropoda, Tardigrada, Arachnomorpha, Trilobita, Chelicerata, Crustacea, Mandibulata, Atelocerata, Hexapoda, segmentation, ecdysis Introduction Arthropods are bilaterally symmetrical segmented animals with paired and usually jointed appendages, on some or all of the body segments, with chitinous claws. The body is surrounded by a tough organic or organic-mineral cuticle, incorporating a -chitin, which functions as an exoskeleton. In order for the animals to grow, the exoskeleton must be moulted regularly. The mixocoel includes metanephridia and, except in tardigrades, an ostiate heart. Segments are added from a posterior growth zone during ontogeny. At least half of the described species of living animals are arthropods (mostly insects), but arthropods are less common as fossils. The most familiar group of fossil arthropods is undoubtedly the trilobites. Fossil groups have been incorporated into arthropod classification systems at least since the 18th century, but important new finds - especially of very early stem group organisms, such as those of the

6. Arthropoda Phylum arthropoda Metamerism as the result of teloblastic growth. Tendency towards regional body specialization. Chitinous cuticle forming exoskeleton with http://www.emporia.edu/biosci/invert/lab6/

Phylum Arthropoda Metamerism as the result of teloblastic growth. Tendency towards regional body specialization. Chitinous cuticle forming exoskeleton with sclerites (tergites, pleurites, and sternites). Growth by ecdysis. Each body segment primitively with 1 pair of jointed appendages. Generally 1 pair of lateral, compound eyes, and one to several median eyes. Scizocoelom reduced to portions of excretory and reproductive systems. Main body cavity an open hemocoel. Dorsal heart with lateral ostia. Complete gut. Nervous system comparable to annelids. Striated muscle arranged in segmental bands. Most gonochoristic. Direct, indirect, and mixed development. Subphylum Chelicerata Body divided into cephalothorax (prosoma) and abdomen (opisthosoma). Antennae absent. Generally 8 pairs of appendages. First pair of appendages modified as chelicerae. Second pair of appendages modified as pedipalps. Class Merostomata 5 or 6 pairs of abdominal appendages modified as gills. Posterior telson. Limulus polyphemus - horseshoe crab [juvenile] [adult] Class Arachnida Unsegmented prosoma generally covered dorsally by a solid carapace. Waxy epicuticle. Book lungs and tracheae.

7. Arthropoda Introduction - Introduction About 80% of all known animal species belong to the arthropoda about 800000 species have been described, and recent estimates put the total number of http://www-biol.paisley.ac.uk/Courses/Tatner/biomedia/units/arth1.htm

Unit: Arthropoda introduction 1 Introduction ARTHROPODA The arthropods are by far the most successful phylum of animals, both in diversity of distribution and in numbers of species and individuals. They have adapted successfully to life in water, on land and in the air. About of all known animal species belong to the Arthropoda - about 800,000 species have been described, and recent estimates put the total number of species in the phylum at about 6 million. Arthropods are found in a greater variety of habitats than any other animal group; on top of mountains, at great depths in the ocean and in the icy wilderness of Antarctica. They can survive great extremes of temperature, toxicity, acidity and salinity. Now extinct, TRILOBITES represent the oldest known examples of arthropods. An extremely diverse phylum with many classes both large and small, there are several classifications of the phylum. You will find only an abbreviated version on the Taxonomy Table page which will be expanded in other relevant units (e.g. Crustacea This unit is therefore intended as an overview of the common features of arthropods which have allowed them to become so successful.

8. Dichotomous Key/Arthropoda - Wikibooks, Collection Of Open-content Textbooks Retrieved from http//en.wikibooks.org/wiki/Dichotomous_Key/arthropoda . Subject Dichotomous Key. Views. Module Discussion Edit this page History http://en.wikibooks.org/wiki/Dichotomous_Key:Arthropoda

Dichotomous Key/Arthropoda From Wikibooks, the open-content textbooks collection Dichotomous Key (Redirected from Dichotomous Key:Arthropoda Jump to: navigation search Dichotomous Key : Arthropoda Kingdom: Animalia Phylum: Arthropoda Information related to Arthropoda Wikipedia Wikispecies Wikicommons Parent key: Animalia Phyla Arthropoda Key: Arthropoda Arthropoda edit Number of antennae Two pairs - Crustacea One pair or none - Animalia keys Subkingdom Agnotozoa Phyla Acoelomorpha Cnidaria Ctenophora Myxozoa ... Rhombozoa Superphylum:Deuterostomia Chaetognatha Chordata Echinodermata Hemichordata Superphylum:Ecdysozoa Arthropoda Kinorhyncha Loricifera Nematoda ... Tardigrada Superphylum:Lophotrochozoa Annelida Brachiopoda Ectoprocta Entoprocta ... Sipuncula Superphylum:Platyzoa Acanthocephala Cycliophora Gastrotricha Gnathostomulida ... edit Number of legs Three pairs - Hexapoda Four or more pairs - edit 3: Antennae Antennae Present - Myriapoda Not present - edit 4: Body segments Number of body segments in adult Two - Arachnida Other than two - edit 5: Pedipalps Pedipalps modified to pincers Present - Not present - edit 6: Stinger Stinger at tip of tail Present - Scorpionida Not present - Pseudoscorpionida edit 7: Legs Leg size Very small - Acari Very large - Opiliones Retrieved from " http://en.wikibooks.org/wiki/Dichotomous_Key/Arthropoda

9. ITIS Standard Report Page: Arthropoda Phylum, arthropoda arthropodes, arthropods, Artrópode. Direct Children ISBN/ISSN 087893-097-3. Notes. Reference for arthropoda http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=82

10. M28.htm Phylum arthropoda Mantis shrimp, from Tomiyama et. al., 1970. The largest and most diverse group of animals known, and by many criteria the most successful, http://www.meer.org/M28.htm

MEER home Marine biology home Table of Contents Index ... Links Phylum Arthropoda Mantis shrimp, from Tomiyama et. al., 1970. The largest and most diverse group of animals known, and by many criteria the most successful, arthropods can be found in a bewildering array of body forms, lifestyles, and habitats. All Arthropods have jointed appendages and a hard exoskeleton. In the marine environment the dominant arthropod group is the crustaceans (compared to the terrestrial environment which is dominated by insects ). There are also many other groups of arthropods that can be abundant in certain environments. CLASSES OF ARTHROPODS SUBPHYLUM TRILOBITAMORPHA (Trilobites and their relatives, wholly extinct) SUBPHYLUM CHELICERIFORMES Class Chelicerata Subclass Merostomata (horseshoe crabs) Subclass Arachnida (spiders, scorpions, mites, ticks) Horseshoe crab Limulus polyphemus class Arachnida , subclass Merostomata , from Pratt, 1923. The Chelicerates are an ancient group, originating from at least early Cambrian times, and are well represented in the fossil record. They include the extinct Eurypterids , or water

11. Palaeos Metazoa: Arthropoda: Arthropoda Giribet G, Carranza S, Baguna J, Riutort M, Ribera C First molecular evidence for the existence of a Tardigrada + arthropoda clade. http://www.palaeos.com/Invertebrates/Arthropods/8080C0Arthropoda.html

Palæos Arthropoda METAZOA Arthropoda Page Back Unit Back Metazoa Cladogram ... Time The Arthropoda animals with jointed exoskeletons Protostomia Arthropoda Trilobita Euarthropoda Myriapoda Chelicerata ... phylogeny of Crown-Anthropoda after Hwang, et al., 2001 phylogeny of Crown-Anthropoda after Giribet, et al., 2001 Links Notes References The arthropods constitute the most successful and diverse form of life on Earth, constituting millions of species in a diverse range of habitats, and varying in size from microscopic to quite large. The name "arthropod" comes from the Greek, arthros jointed, and podes , feet. Hence, jointed feet. All arthropods possess a jointed rigid exoskeleton, which both supports the musculature and protects the animal. The exoskeleton is formed by the cuticle, a protective layer composed mostly of chitin, long chained molecules of the sugar acetyl glucosamine, which when cross-linked form tough fibers embedded in a protein matrix As the animal grows it has to shed its exoskeleton at regular intervals, a process known as molting . During this time it is vulnerable to predators and disease, and also to desiccation if it is a terrestrial form like an insect or spider. Because the larger the animal the longer it takes for the new molt to harden, and hence the longer the time it is vulnerable, this process imposes limits on the size arthropods grow to. Another limit with terrestrial forms like insects is that breathing is through pores in the side of the body. Hence arthropods are mostly small, even microscopic, with very few growing to giant size. Science fiction giant ants and the rest are simply physiologically impossible (though that never stopped sci fi writers in the past).

12. Arthropod Information The arthropods constitute over 90% of the animal kingdom and are classified in the phylum arthropoda. They are distinguished from other animals by http://insected.arizona.edu/arthroinfo.htm

Arthropod Information Return to previous page What is an arthrpod? The arthropods constitute over 90% of the animal kingdom and are classified in the phylum Arthropoda. They are distinguished from other animals by: an exoskeleton (a skeleton on the outside of the body) body divided into distinct parts jointed legs and appendages bilateral symmetry (both sides of the body are the same) Class Distinctions Insects Grasshoppers, butterflies, beetles, ants, etc. 1,000,000 described world species three body regions: head, thorax, abdomen six legs attached to the thorax (which has 3 segments) adults with one or two pairs of wings attached to the thorax (some have none) two antennae lateral compound eyes Arachnids Spiders, scorpions, ticks, mites, etc. 65,000 described world species two body regions: cephalothorax, abdomen eight legs no antennae Mouth parts are chelicerae(modified appendages) which in spiders are fangs Crustaceans (technically a subphylum) Classes include crabs, shrimps, lobsters, barnacles, isopods etc. 44,000 described world species two body regions two pairs of antennae 5 or more pairs of legs primarily aquatic, few terrestrial

13. Natural Perspective: Joint-Legs (Phylum Arthropoda) Phylum arthropoda (JointLegs) http://www.perspective.com/nature/animalia/arthropoda.html

Page 32 of 38 Natural Perspective The Animal Kingdom : Joint-Legs ( Arthropoda (Last modified: 21 July 1997) Arthropoda , the jointed leg spineless creatures of the world, are among the most maligned of all animals. This rule is not universal, of course. Many people adore Butterflies of the Order Lepidoptera and the ancient Egyptians even worshipped the Scarab Beetle of Order Coleoptera but on the whole, when modern governments spend money on Arthropods it is to find a way of eradicating them. Never-the-less, the "bugs" of this phylum have served an important role in the history of this planet, whether as carriers of the most devastating plagues in human history or for enabling the parallel evolution of our beautiful flowering plants. This large group of bugs and crustacians numbers 500,000 strong by today's counts. Scientists believe that up to 10,000,000 Arthropod species are alive today. Insects ( Class Insecta The majority of Arthropoda 290,000 species are insects. This includes the moth and stinkbug, pictured here as well as ants, bees, beetles, butterflies, flies, grashoppers, wasps and a whole lot more. Arachnids ( Class Arachnida Arachnids are eight-legged creatures including spiders, scorpions, and ticks.

14. Welcome To Www.arthropoda.org! Search Results Powered By OXiDE Search ....radica www.arthropoda.org, Search the web and find what you are looking for with OXiDE Search! Live Life Through OXiDE! http://www.arthropoda.org/

Search the web and find what you are looking for with OXiDE Search! Live Life Through OXiDE! Search the web and find what you are looking for with OXiDE Search! Live Life Through OXiDE!

15. Arthropoda - Wiktionary Hexapoda (insects etc.) Myriapoda (centipedes etc.) Trilobitomorpha (trilobites — extinct). Retrieved from http//en.wiktionary.org/wiki/arthropoda http://en.wiktionary.org/wiki/Arthropoda

Arthropoda From Wiktionary Jump to: navigation search Contents Translingual Etymology Proper noun Related terms ... edit Translingual edit Etymology From the Greek arthron , meaning joint ) and pous/podos meaning foot edit Proper noun Wikipedia has an article on: Arthropoda Wikipedia Arthropoda a taxonomic phylum , within superphylum Protostomia — the arthropods edit Related terms Wikispecies has information on: Arthropoda Wikispecies arthropodean subphyla ... spiders etc.) Crustacea crabs etc.) Hexapoda insects etc.) Myriapoda centipedes etc.) Trilobitomorpha trilobites — extinct) Retrieved from " http://en.wiktionary.org/wiki/Arthropoda Category Taxonomic names Views Entry Discussion Edit History Personal tools Log in / create account Navigation Main Page Community portal Requested entries Recent changes ... Contact us Search Toolbox What links here Related changes Upload file Special pages ... Permanent link In other languages Deutsch Fran§ais This page was last modified 10:24, 6 September 2007. Content is available under GNU Free Documentation License About Wiktionary

16. UniProtKB/Swiss-Prot Taxonomic Query: Arthropoda www.expasy.ch/cgibin/get-entries?OC=arthropoda - Similar pages Phylum arthropodaPhylum arthropoda - Characteristics. 1. EXOSKELETON In most arthropods the body is Phylum arthropoda - Extant Groups. CLASS INSECTA Insects (derivation http://www.expasy.ch/cgi-bin/get-entries?OC=Arthropoda

17. Marcelo Campos Pereira Phylum arthropoda . Subphylum Mandibulata . Superclass Hexapoda other selected links The Parasitology Images ListarthropodaInsecta Iowa State http://www.icb.usp.br/~marcelcp/

University of São Paulo Institute of Biomedical Sciences Department of Parasitology Marcelo de Campos Pereira, PhD The Veterinary Parasitology Images Gallery Arthropoda: Insecta and Acari (Under development. Please, be patient) WELCOME INDEX CONTACT WELCOME The following images are provided for use as teaching aids for the training and education of veterinarians and can be freely used for educational purposes. The images must not be used for commercial intent without my consent. There are 213 images within this site. Liberties have been taken in grouping the parasites to provide a veterinary medical emphasis. Group names occasionally may change depending on the current text book used. I hope you enjoy your visit. If you have comments or suggestions I can be reached by clicking on Contact. CONTACT Contact Information: Department of Parasitology Home Page Mailing address: Marcelo de Campos Pereira, Professor University of São Paulo Institute of Biomedical Sciences Departament of Parasitology Avenida Prof.Lineu Prestes 1374

18. Arthropoda - LoveToKnow 1911 arthropoda, a name, denoting the possession by certain animals of jointed limbs, now applied to one of the three subphyla into which one of the great phyla http://www.1911encyclopedia.org/Arthropoda

Arthropoda From LoveToKnow 1911 ARTHROPODA, a name, denoting the possession by certain animals of jointed limbs, now applied to one of the three sub-phyla into which one of the great phyla (or primary branches) of coelomocoelous animals - the Appendiculata - is divided; the other two being respectively the Chaetopoda and the Rotifera . The word "Arthropoda " was first used in classification by Siebold and Stannius ( Lehrbuch der vergleich. Anatomic, Berlin , 1845) as that of a primary division of animals, the others recognized in that treatise being Protozoa , Zoophyta, Vermes, Mollusca and Vertebrata . The names Condylopoda and Gnathopoda have been subsequently proposed for the same group. The word refers to the jointing of the chitinized exo- skeleton of the limbs or lateral appendages of the animals included, which are, roughly speaking, the Crustacea Arachnida Hexapoda (so-called " true insects "), Centipedes and Millipedes. This primary group was set up to indicate the residuum of Cuvier's Articulata when his class Annelides (the modern Chaetopoda) was removed from that embranchement.

19. The Shape Of Life . Arthropods | PBS Phylum arthropoda Includes Crustaceans, Spiders, Millipedes, Centipedes, Insects. Of the roughly oneand-a-quarter million named animal species, http://www.pbs.org/kcet/shapeoflife/animals/arthropods.html

var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); Includes: Crustaceans, Spiders, Millipedes, Centipedes, Insects Of the roughly one-and-a-quarter million named animal species, over one million are arthropods. These animals occupy by far the widest variety of habitats on Earth. The name Arthropod means "jointed foot." All arthropods have segmented bodies and are covered in a jointed, protective armor called an exoskeleton. Their body muscles attach to the inside of the exoskeleton. In order to grow, arthropods must periodically molt a process that entails shedding their exoskeleton and inflating their body before the new skeleton hardens. The incredible diversity and success of the arthropods can be attributed to their extraordinarily adaptable body plan. A key feature is the evolution of the myriad types of appendages (antennae, claws, wings, shields, mouth parts) that allow arthropods to exploit nearly every niche on Earth. Learn more about Arthropods in "The Conquerors" Website links about Arthropods Hard exoskeleton made of chitin and protein Possess numerous jointed appendages and a segmented body Must molt to grow Classification Common Name Panulirus interruptus spiny lobster Emerita analoga sand/mole crab Callinectes sapidus blue crab Anomalocaris canadensis Anomalocaris Pterygotus sp.

20. Arthropoda Subphylum Trilobitomorpha Extinct; represented in California by fossils. Subphylum Chelicerata. Class Pycnogonida - sea spiders http://www.solpugid.com/cabiota/arthropoda.htm

California Biota Home Page Animalia Phylum Subphylum Trilobitomorpha - [Extinct; represented in California by fossils] Subphylum Chelicerata Class Pycnogonida sea spiders Class Merostomata horseshoe crabs [Not represented in California] Class Arachnida spiders, scorpions, solifuges, harvestmen, mites, ticks, etc. Subphylum Crustacea Class Remipedia - [Not represented in California] Class Cephalocarida horseshoe shrimp Class Branchiopoda fairy shrimp, brine shrimp, tadpole shrimp, water fleas, etc. Class Maxillopoda ostracods, copepods, barnacles Class Malacostraca isopods, amphipods, krill, crabs, shrimp, lobster, etc. Subphylum Uniramia Superclass Myriapoda Class Chilopoda centipedes Class Diplopoda millipedes Class Pauropoda pauropods Class Symphyla garden centipedes Superclass Hexapoda Class Protura proturans Class Diplura diplurans Class Collembola springtails Class Insecta insects

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