21. ADW: Odonata: Classification from the Animal Diversity Web....... http://animaldiversity.ummz.umich.edu/arthropoda/insecta/odonata.html

Overview News Technology Conditions of Use ... Home Kingdom Animalia Phylum Arthropoda Class Insecta Order Odonata Order Odonata (dragonflies and damselflies) Pictures Classification What do these icons mean? The icons tell you what features are available for that taxon. Information Pictures Specimens Sounds Selecting an icon will take you directly to that feature. Confused by a class within a class or an order within an order ? Please see our brief essay Scientific names for Aves taxonomy (family and below) are from The Howard and Moore Complete Checklist of the Birds of the World Parent taxa Subclass Pterygota (winged insects) Order Odonata (dragonflies and damselflies) Suborder Anisoptera (dragonflies) Family Aeshnidae (darners) Family Austropetaliidae Family Cordulegastridae (biddies) Family Corduliidae (green-eyed skimmers) Family Gomphidae (clubtails) Family Libellulidae (common skimmers) Family Neopetaliidae Family Petaluridae (graybacks) Suborder Anisozygoptera Superfamily Heterophlebioidea Family Epiophlebiidae Suborder

22. Phylum Arthropoda Phylum arthropoda. Phylum arthropoda (arthro = joint; poda = foot) is the most numerous phylum of all living organisms, both in number of species and in number of individuals. http://biology.clc.uc.edu/courses/bio106/arthrpod.htm

Phylum Arthropoda Phylum Arthropoda ( arthro = joint; poda = foot) is the most numerous phylum of all living organisms, both in number of species and in number of individuals. One, very conservative, estimate is that there are well over one million species of insects alone. In terms of number of individuals, there are more ants than anything else, and in terms of numbers of species, there are more kinds of beetles than anything else: 40 to 50% of all insect species are beetles. There are more species of insects than all other plants and animals together. An arthropod has a segmented body covered by an exoskeleton made from chitin and other chemicals. This exoskeleton serves as protection and provides places for muscle attachment. Arthropods must molt because their exoskeletons don’t grow with them. Arthropods have open circulatory systems consisting of a dorsal heart which collects blood from the body cavity and pumps it back into the body cavity again. In insects, the anterior portion of the heart (which is located in the abdomen) is extended into a tube that is called an aorta which directs the blood forward as it goes out into the body cavity. Arthropods have a well-developed, mesodermal, ventral, solid nerve cord and well-developed sense organs. The body feature from which the phylum takes its name is the jointed appendages, which include antennae and mouthparts as well as walking legs. It is thought that the early arthropod ancestors (descended from organisms that looked like marine worms or, later

23. Arthropoda Invertebrates in the Plankton arthropoda The phylum arthropoda encompasses a tremendous range of marine species and body plans, as well as an amazing diversity of terrestrial http://depts.washington.edu/fhl/zoo432/plankton/plarthropoda/plarthropoda.html

Invertebrates in the Plankton: Arthropoda The phylum Arthropoda encompasses a tremendous range of marine species and body plans, as well as an amazing diversity of terrestrial insects and spiders. Coastal and nearshore marine habitats, including the plankton, feature a number of these forms, such as copepods, crabs, and barnacles. While the mobile, highly jointed bodies of crabs and copepods may seem quite different from the sessile, immobile carapaces of barnacles, these groups share important traits: a chitinous exoskeleton and a need to molt that exoskeleton in order to grow larger. In our observations of the plankton, we found both larval and fully planktonic species to be very abundant: during our night-lighting from the Lab dock, we caught many hundreds of two crab larval stages, zoea and megalopae. And in our daytime plankton tow in the Straits area close to Friday Harbor, we caught great numbers of several different types of copepods. Photos of these and our other discoveries follow. Brachyuran Crabs This crab megalopa (4 mm in length) was one of hundreds captured by night-lighting during the last week of June. It swam strongly at the water's surface, its legs occasionally splaying energetically. This megalopa is the final larval stage of true crabs, preceding the benthic juvenile stage and following several zoeal stages. One of the most recognizable brachyurans (also known as true crabs) along the Pacific coast is the Dungeness crab (

24. Introduction To The Siphonaptera A brief introduction to fleas by UCMP Berkeley, with photograph. http://www.ucmp.berkeley.edu/arthropoda/uniramia/siphonaptera.html

Siphonaptera Fleas Ctenocephalides felis , the cat flea shown here, is a typical member of the Siphonaptera ("sucking-wingless"), the fleas. Although known to be related to the true flies (the Diptera ) by details of internal structure, the Siphonaptera are highly modified for a parasitic existence; they have no wings and no compound eyes, the legs are modified for jumping, the antennae are very short and recessed in grooves on the head, and the body is highly flattened laterally. Most are parasites on mammals ; a few live on birds . Adult fleas feed on blood, while their larvae feed on organic debris. Fleas are extremely rare as fossils; their small size and specialized habitat makes them highly unlikely candidates for fossilization. Two species have been found in amber from the Baltic region (late Eocene-Oligocene); living members of the family of fleas to which these fossils belong ( Hystrichopsyllidae ) are mostly parasitic on insectivores (moles and shrews). A few Cretaceous fossils have been assigned to the Siphonaptera (e.g. Riek, 1970), but some of these fossils are questionable (Carpenter, 1992). Since the Siphonaptera are mostly parasitic on mammals, they presumably evolved at about the time the mammals were evolving, in the Jurassic and Cretaceous.

25. Arthropoda OK, I will admit it. There is one spectacular thing cephalopods can do that mantis shrimp simply don’t have an answer for. Squids, cuttlefish, and octos are the true masters of http://arthropoda.southernfriedscience.com/

Search for: Arthropoda Home About Favorite Posts ... Monday Mimic #2 Published on November 1, 2010 in Monday Mimic Photo by . ID to follow. This critter looks like a wasp, but what is it really? What are the give-aways? What sort of mimicry is it practicing? Previous Monday Mimics: Ant-mimicking broad-headed bug nymph Comments Friday Fail: A horse of a different color Published on October 29, 2010 in Friday Fail Humor and Lepidoptera (Butterflies, Moths) An oldie-but-goodie: Previous arthropod taxonomy fails: Cucaracha Amphipod/Decapod/Fish Comments Something that the squishies can do better than arthropods Published on October 27, 2010 in Squishies (Mollusks) Tags: camouflage Chromatophores Squid masters of active camouflage . Through the use of muscle-controlled chromatophores , filled with colored pigment, cephalopods can rapidly and seamlessly blend in with their surroundings or communicate with others. Today, a lab-mate was dissecting some Longfin Inshore Squid ( Loligo pealeii ). The chromatophores on these animals were still physiologically active, even though they were sacrificed over a day ago and shipped to us on ice. I was able to capture some video of these beautiful chromatophores in the skin rapidly expanding and contracting. Enjoy. There will be more video content to come. Can you say mantis shrimp plus power metal? Oh, hell yeah!

26. Introduction To The Pycnogonida Brief introduction to sea spiders, including information on their feeding and anatomy. http://www.ucmp.berkeley.edu/arthropoda/pycnogonida.html

Introduction to the Pycnogonida Pycnogonids, or "sea spiders", are among the most bizarre-looking arthropods . Another name sometimes used for them, Pantopoda, means "all legs" and describes them perfectly. Pycnogonids have extremely reduced bodies in which the abdomen has almost disappeared, while the legs are long and clawed. The head has a long proboscis with an unusual terminal mouth and several simple eyes on a central tubercle . The head also bears a pair of claws and a pair of ovigers on which the eggs are carried. All in all, it can be hard to tell just which end of a pycnogonid is the head; in this picture the head is to the right (we think) and the proboscis has been bent under the body. Pycnogonids feed on soft-bodied invertebrates, in particular cnidarians , sucking at them with their probosces, and larval pycnogonids often live as parasites within cnidarian tissues. The intestine of pycnogonids has extremely long diverticulae (blind pouches) that extend to the ends of the legs. Pycnogonids have almost no fossil record. Three genera have been found in the Devonian , in the Hunsruck Slate of western Germany. A cast of one of them

27. Arthropoda: Free Encyclopedia Articles At Questia.com Online Library Research arthropoda and other related topics by using the free encyclopedia at the Questia.com online library. http://www.questia.com/library/encyclopedia/101230084

28. The Earthlife Web - Sea Spiders: Class Pycnogonida An introduction to the biology and ecology of Sea Spiders (arthropoda Pycnogonida). http://www.earthlife.net/chelicerata/pycnogonida.html

Pycnogonida (Sea Spiders) Menu Introduction Morphology Ecology Introduction Pycnogonids are odd looking creatures which live in the seas and oceans of the world and normally have 4 pairs of walking legs, but they may have 5 or even 6 pairs in some cases. They have practically no body and a proboscis. They have been relatively little studies and there is a great deal we still do not know about them. The fossil record of pycnogonids is very meagre, Paleopantopus maucheri is an early Devonion fossil is one of the few well documented species. Despite this lack of hard evidence, scientists deduce from morphological and embryonic studies that the Pycnogonids are an old lineage of animals, though nobody can really put a date on their first appearance. Pycnogonids are found all over the world, from coastal tropical waters to the poles. They are also found at depths as great as 7,000 metres deep, though they are far more common in shallower waters. They range in size from a few millimetres of leg-span to giants with a legspan of 75 centimetres (2.8 ft). As of the late 1990's there were about 1,000 species known to science divided into 8 families and 86 genera. They are common in the Mediterranean, the Carribean and around the poles, and not that difficult to find in rock pools once you get your eye in. Morphology The typical pycnogonid looks like an emaciated (under fed) spider walking backwards, which is why they are called Sea Spiders. Their body is greatly reduced until it has become little more than a place for the legs to be attached. There are normally 4 pairs of walking legs, but a number of species, or subspecies have 5 pairs (

29. Arthropoda Definition Of Arthropoda In The Free Online Encyclopedia. arthropoda ( rthrŏp`ədə) Gr.,=jointed feet, largest and most diverse animal phylum. The arthropods include crustaceans crustacean, primarily aquatic arthropod of the http://encyclopedia2.thefreedictionary.com/Arthropoda

30. Arthropoda (Phylum) Information about the Phylum arthropoda including photos, maps, and text. http://zipcodezoo.com/Key/Animalia/Arthropoda_Phylum.asp

31. Arthropoda phylum porifera cnidaria ctenophora platyhelminthes nemertinea sipunculida annelida arthropoda bryozoa brachiopoda mollusca echinodermata chordata http://library.thinkquest.org/26153/marine/arthro.htm

ARTHROPODA PHYLUM: PORIFERA CNIDARIA CTENOPHORA PLATYHELMINTHES ... ANNELIDA ARTHROPODA BRYOZOA BRACHIOPODA MOLLUSCA ECHINODERMATA ... CHORDATA BACK TO : KINGDOM ANIMALIA (Greek.arthos = jointed + podos = foot) The phylum arthropoda contains the greatest majority of all the known animals (around 1 mil species). Most of these species are also very abundant as individuals. It includes the crustaceans ( Crustacea ), insects ( Insecta ), the spiders, scorpions, ticks and their equals ( Arachnida ), the centipedes ( Chilopoda ), and the milipedes ( Diplopoda ). One of the most important phylums ecologically, because it dominates all terrestrial and aquatic ecosystems in numbers of species, individuals or both. Also because a major share of the energy passing through these systems passes through arthropod bodies. All arthropods are externally segmented in a varying degree. Their limbs are jointed and are differentiated for special purposes. The whole of the body is covered with a hard exoskeleton of chitin and in some cases strengthened by calcium carbonate. Because the exoskeleton cannot expand, arthropods periodically have to shed their exoskeletons, a process called moulting, and then they can expand rapidly. Immediately after moulting, arthropods are soft and vulnerable, untill a new layer of chitin is deposited and becomes hard. Insecta and Araneae are very ill represented in the ocean.

32. 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 (or primary 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.

33. Arthropoda - Encyclopedia Of Life arthropoda (Arthropods) in Encyclopedia of Life 19952008, The Regents of the University of Michigan and its licensors http://www.eol.org/pages/164

34. Arthropods INTRODUCTION. Arthropods are the most diverse phylum today and probably also in the geologic past. They are a highly specialized group which are characterized by http://paleo.cortland.edu/tutorial/Arthropods/arthropods.htm

ARTHROPODA From Eldredge (1991) INTRODUCTION Arthropods are the most diverse phylum today and probably also in the geologic past. They are a highly specialized group which are characterized by their bilaterally symmetrical body, paired appendages and a chitinous (calcite in some groups) exoskeleton. As the exoskeleton once produced remains inert, arthropods must periodically shed their exoskeleton during molting and re-precipitate a larger one in order to accommodate their larger size. Many arthropods may be familiar to you such as crabs, lobsters, barnacles, and insects, yet the fossil record of the phylum is dominated by few groups, particularly the trilobites, and to a lesser extent the eurypterids, and ostracodes. The trilobites in particular are unparalleled for their biostratigraphic utility for Cambrian and Ordovician and to a lesser extent Devonian sediments. Conversely, the eurypterids and ostracodes are more useful in determining ancient environments at least during mid to latter Paleozoic times. Phylum Arthropoda (Precambrian-Recent) Superclass Trilobitomorpha (Cambrian-Permian) Class Trilobita (Cambrian-Permian) Order Polymerida (Cambrian-Permain) Order Agnostida (Cambrian-Ordovician) Superclass Crustacea (?Precamb., Cambrian-Recent)

35. Arthropoda I am moving my blog off of wordpress.com and joining the Southern Fried Science blog network. arthropoda can now be found here. Please update your blogrolls and RSS feeds for http://arthropoda.wordpress.com/

Arthropoda I, for one, welcome our new chitinous overlords. Blog About Favorite Posts Contact ... Arthropoda has moved Published August 11, 2010 Administrative Leave a Comment I am moving my blog off of wordpress.com and joining the Southern Fried Science blog network . Arthropoda can now be found here . Please update your blogrolls and RSS feeds for my new address. I hope to see you all at my new home. Published September 20, 2010 Administrative Leave a Comment RSS address . Get with the program, slackers! Ocean of Pseudoscience Published September 13, 2010 Administrative Leave a Comment See all of my posts on arthropod cryptozoology, creationism, and pseudoscience for the Ocean of Pseudoscience blog event at Some recent insect photos Published August 30, 2010 Administrative Leave a Comment home ... Do scarab beetles get to join an exclusive visual sensory club? Published August 27, 2010 Uncategorized Leave a Comment Animal visual systems are evolutionarily tuned to exploit environmental light towards the purposes of spatial perception, navigation, and intraspecific communication. We predominately experience visual information based on variations in the intensity and the wavelengths of incoming light; perceived as brightness and colors. Other animals however, especially the arthropods, also rely on an additional visual modality with which to perceive their world. They are capable of detecting and discriminating different polarizations of light waves. previously discussed how most arthropods detect linearly polarized light (LPL), and last week

36. Arthropoda — Infoplease.com Encyclopedia arthropoda. arthropoda ( rthrop' u d u) Gr.,=jointed feet, largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes http://www.infoplease.com/ce6/sci/A0804873.html

37. Arthropoda | Define Arthropoda At Dictionary.com –noun the phylum comprising the arthropods. Use arthropoda in a Sentence See images of arthropoda Search arthropoda on the Web Origin 1865–70; NL; see arthro , poda http://dictionary.reference.com/browse/Arthropoda

38. Arthropoda - Definition Of Arthropoda By The Free Online Dictionary, Thesaurus A Ar`throp o`da. n. pl. 1. (Zool.) A large division of Articulata, embracing all those that have jointed legs. It includes Insects, Arachnida, Pychnogonida, and Crustacea. http://www.thefreedictionary.com/Arthropoda

39. Arthropoda - Definition Of Arthropoda In The Medical Dictionary - By The Free On arthropoda /Ar throp o da/ (ahrthrop o-dah) the largest phylum of animals, composed of bilaterally symmetrical organisms with hard, segmented bodies bearing jointed legs http://medical-dictionary.thefreedictionary.com/Arthropoda

40. The Trilobites, Crabs, Insects, Spiders And Their Allies (Phylum Arthropoda) An introduction to the biology, classification and ecology of Insects, Spiders and Allies the phylum arthropoda http://www.earthlife.net/inverts/arthropoda.html

The Phylum Arthropoda Etymology:- From the Greek Arthron a joint and Pous for foot. Characteristics of the Arthropoda:- 1)Bilaterally symmetrical (in most cases). 2)Body has more than two cell layers, tissues and organs. 3)Body cavity a true coelom. 4)Most possesses a through straight gut with an anus (in most cases). 5)Body possesses 3 to 400+ pairs of jointed legs. 6)Body possesses an external skeleton (in most cases). 7)Body is divided in 2 or 3 sections. 8)Nervous system includes a brain and ganglia. 9)Possesses a respiratory system in the form of tracheae and spiracles (in most cases). 10)Possesses a open or lacunnar circulatory system with a simple heart, one or more arteries, and no veins, (in most cases). 11)Reproduction normally sexual and gonochoristic, but can be parthenogenetic. 12)Feed on everything. 13)Live everywhere. Introduction Among the living animals of the world Crabs and Prawns, Woodlice, Spiders, Scorpions, Insects, Millipedes and Centipedes are all Arthropods, linked together by the possession of a hard jointed exoskeleton, a through-gut and jointed limbs. Arthropods are currently thought to have evolved from Annelids. Both groups have the same sort of central nervous system, a similar circulatory system along with metameric segmentation and tagmatization

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