61. Crustacea - Definition And More From The Free Merriam-Webster Dictionary Definition of word from the MerriamWebster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. http://www.merriam-webster.com/medical/crustacea

62. Crustacea (crabs, Lobsters, Shrimps, Prawns, Barnacles) Class crustacea (crabs, lobsters, shrimps, prawns, barnacles) Life Eukaryotes Opisthokonta Metazoa (animals) Bilateria Ecdysozoa Panarthropoda Tritocerebra http://www.biodiversityexplorer.org/mm/crustacea/index.htm

Class: Crustacea (crabs, lobsters, shrimps, prawns, barnacles) Life Eukaryotes Opisthokonta Metazoa (animals) ... Arthopoda Introduction The Crustacea are a subphylum within the Arthropoda that are primarily marine with a few fresh water forms and even fewer are terrestrial. This large and very diverse group includes marine lobsters, crabs, shrimps, prawns and barnacles. The name crustacean is derived from their hard, crusty exoskeleton made from chitin. Although quite diverse, crustaceans are characterised by having three distinct body parts; the head, thorax and abdomen. The head region usually bears a pair of compound eyes and five pairs of appendages (ie., two pairs of sensory antennae and three pairs of mouthparts for feeding). Biramous (Double branched) appendages on the thorax and abdomen are arranged segmentally. One branch is usually the gill branch while the other is the leg branch. There are over 40,000 species of crustaceans known globally which are classified further based on complex body, carapace and appendage morphology. The Ostracoda or seed shrimps have a carapace shaped like that of a bivalve mollusc, which covers the entire body. The Copepoda or krill are small, often planktonic, lack a carapace, have 4-6 thoracic limbs and no abdominal appendages. The Cirripedia or barnacles have a body enclosed by a shell of calcareous plates. The Malacostraca or shrimp-like or crablike forms have eight pairs of thoracic limbs and usually possess swimming appendages on the abdomen. At present ~2333 crustacean species are known from South Africa.

63. 404 PAGE NOT FOUND | University Of Greenwich - University Of Greenwich The Ostracod Research Group provides information on these small crustaceans, their morphology, anatomy and life cycle, with diagrams and a short movie. http://w3.gre.ac.uk/schools/nri/earth/ostracod/introduction.htm

Study with Greenwich Student Information About Us Research ... PAGE NOT FOUND Study with Greenwich Undergraduate Prospectus Combined Honours Programmes Postgraduate Prospectus Foundation Degrees ... Staff Recruitment University News Latest News What's On? Search Search the university website 404 PAGE NOT FOUND Sorry, but the page you were expecting to see could not be found. As the University of Greenwich website continues to grow pages are occasionally moved, deleted or incorporated into other pages. What Now? If you typed the web address from a printed source, check the exact spelling The main navigation areas are available from the links to the top and left of this page You can return to the University of Greenwich Home Page You can use our site search to find the information you were looking for by typing relevant keywords into the search box in the left column of this page To report an internal link that is not functioning correctly contact the university WebTeam at webteam@gre.ac.uk Other addresses, telephone numbers and e-mail addresses, together with directions to our campuses, can be found on the Contact Us page WebCT can be found here: http://www.gre.ac.uk/webct

64. Bioegog Template Project by Vanessa Stevens on this endangered crustacean, including its description, natural history, distribution, evolution and status. http://bss.sfsu.edu/holzman/courses/Fall 03 project/lpackard.htm

Geography 316: Biogeography The Biogeography of the Vernal Pool Tadpole Shrimp (Lepidurus packardi) Photo courtesy: Larry Serpa (#1) by Vanessa Stevens, student in Geography 316 Fall 2003 Species Name: Lepidurus packardi Kingdom: Animalia Phylum:_Arthropoda Subphylum: Crustacea Class: Branchiopoda Order: Notostraca Family: Triopsidea Genus: Lepidurus Species: Lepidurus packardi Description of Species: Lepidurus packardi is a small freshwater crustacean. It ranges in size with maturity and nutrition (Rogers, 2001). Its body can be characterized as a smooth protective concave shell or carapace which protects the head and thorax. A pair of eyes is centered atop at the anterior end of its shell. The light sensitive, nuchal organ is between the eyes (Rogers, 2001). Its segmented abdomen is visible (posterior), and the last segment produces a pair of whip-like appendages called cercopods. Vernal pool tadpole shrimp from the genus Lepidurus distinguish themselves with a single leaf shaped paddle between its cercopods (Goettle, 1997). At full maturity

65. Water Fleas Information and several fine photographs of these small crustaceans. http://www.microscopy-uk.org.uk/mag/artjun99/wflea.html

WATER FLEAS by Jan Parmentier and Wim van Egmond Bosmina longirostris Water fleas belong to the Crustacea, a large group of 'jointed limbed' animals, most of which live in water. Water fleas are placed in the order Cladocera and are probably called 'fleas' because they move through the water by a sort of hopping. Water fleas are very common in fresh water, in Britain you can find about 80 different species, in The Netherlands about a 100 species. Many of them are rare. For most people, water fleas are all similar, but when we look more closely, big differences will be found in morphology and in habits. Acroperus harpae The chief characteristic of the water fleas is that the main part of the body is enclosed in a kind of shell, with the appearance of two lids, but made of one piece. They are interesting animals for the microscopist. Because you can see through them, you can study for instance the beating of the heart and follow the course of the blood cells round part of the body. Their sizes differ from several hundred microns to more than five millimetre for the larger species.

66. Nebalia Exercise from Invertebrate Anatomy OnLine covering the systematics and external anatomy of this crustacean. http://webs.lander.edu/rsfox/invertebrates/nebalia.html

TEXT ONLY PRINT Home Invertebrate Anatomy OnLine ... Invertebrate Anatomy OnLine Invertebrate Anatomy OnLine Nebalia pugettensis Richard Fox Lander University Preface This is one of many exercises available from Invertebrate Anatomy OnLine an Internet laboratory manual for courses in Invertebrate Zoology. Additional exercises can be accessed by clicking on the links to the left. A glossary and chapters on supplies and laboratory techniques are also available. Terminology and phylogeny used in these exercises correspond to usage in the Invertebrate Zoology textbook by Ruppert, Fox, and Barnes (2004). Hyphenated figure callouts refer to figures in the textbook. Callouts that are not hyphenated refer to figures embedded in the exercise. The glossary includes terms from this textbook as well as the laboratory exercises. Systematics Arthropoda P , Mandibulata, Crustacea sP , Eucrustacea, Thoracopoda, Phyllopodomorpha, Ostraca, Malacostraca C , Leptostraca O , Nebaliacea sO , Nebalidae F (Fig 16-15, 19-67, 19-90) Arthropoda P Arthropoda, by far the largest and most diverse animal taxon, includes chelicerates, insects, myriapods, and crustaceans as well as many extinct taxa such as Trilobitomorpha.

67. The Plankton Net Online Guide to Research in Plankton Ecology and Biological Oceanography http://www.biosci.ohiou.edu/faculty/currie/ocean/

68. Copepod General Biology A brief article with diagrams, summarizing the taxonomy, anatomy and distribution of copepods. http://museumvictoria.com.au/crust/copbiol.html

MUSEUM VICTORIA MELBOURNE MUSEUM SCIENCEWORKS IMMIGRATION MUSEUM ... Distribution Anatomy A common feature uniting all the copepod orders is a single simple eye in the middle of the head, at least in the larval stage. The cephalosome , a shield over the head and some thoracic segments distinguishes the free living forms. Most are very small, less than 1 mm long, but rare oceanic species are over 1 centimetre. There are several different forms of copepods arranged into ten groups called orders. It is not a simple matter to distinguish the orders of copepods, and impossible without a good microscope. Few biologists attempt to identify copepods beyond the level of order but species diversity has been found by those that have to be very high. Most of the free-living species belong to only three orders. The rest are usually parasitic, some barely recognisable as crustaceans except when larvae. Biology Free-living copepods will be found only by towing very fine nets, certainly less than quarter-millimetre mesh, through a pond or sea-water, or by washing the fauna off marine algae through a net of this kind. Animals which may appear only as a tiny speck to the naked eye may be copepods but their identity demands most detailed microscopic examination of preserved specimens.

69. The World Of Copepods - Intro Provides a searchable database including a bibliography of sources. http://www.marinespecies.org/copepoda/

About Search Browse Bibliography ... Log in Current number of valid species: What is a copepod? The Subclass Copepoda traditionally comprises 10 Orders**: Calanoida Cyclopoida Gelyelloida Harpacticoida Misophrioida Monstrilloida Mormonilloida Platycopioida Poecilostomatoida Siphonostomatoida **There is uncertainty and scientific debate over the validity of some orders, in particular the Monstrilloida and Poecilostomatoida. The Class Branchiura comprises 1 Family (the Argulidae) and 4 valid genera: Argulus Chonopeltis Dipteropeltis Dolops NEW TAXONOMIC INFORMATION available (Nov 2009) Editorial board Editors T. Chad Walter Smithsonian Institution; Department of Invertebrate Zoology Museum Support Center, MRC 534, 4210 Silver Hill Road Suitland, MD 20746 USA Geoff Boxshall Natural History Museum; Department of Zoology Cromwell Road London, SW7 5BD, UK Associate Editors Family Oncaeidae Ruth Böttger-Schnack Moorsehdener Weg 8 24211 Rastorf-Rosenfeld, Germany Families Diaixidae, Parkiidae, Phaennidae, Scolecitrichidae and Tharybidae Frank D. Ferrari

70. Copepods Information regarding groundwater copepods, with particular reference to Italy, including checklists and links. http://www.luciopesce.net/gw/copepod.html

T he copepods are the largest and most diversified group of crustaceans. At present they include over 14.000 species, 2.280 genera and 210 families, a surely underestimated number, inhabiting sea and continental waters, semiterrestrial habitats, or living in symbiotic relationships with other organisms. They are considered the most plentful multicellular group on the earth, outnumbering even the insects, which include more species, but fewer individuals! Particularly, the copepods are the dominant forms of the marine plankton and constitute the secondary producers in the marine environments and a fundamental step in the trophodinamics of the oceans. D uring their long evolutionary history, starting in the Lower Cretaceous, copepods spread over all the continents, as well as they successfully colonized about all the available water habitats of the Planet, becoming well adapted or specialized to very different salinity regimes, from marine and hypersaline waters to continental freshwater bodies, and to a wide range of temperature from the polar to the hot springs waters. C N everthless, the astonishing success of this group of microcrustaceans is due to their symbiotic relationships with other organisms: in fact, they virtually can parasitize or be the intermediate hosts of all the animal groups, from sponges to vertebrates, including mammalians and man, and it is likely that the number of associated or parasitic taxa known today could represent only a small fraction of the living species, especially in marine waters. Copepods that parasitize fish skin and gills are serious pests of commercial importance in both marine and freshwater fish farms.

71. Kempf Database Ostracoda Indexes and bibliographies for living and fossil marine and nonmarine Ostracoda of the world. http://ostracoda-on.tripod.com/

Build your own FREE website at Tripod.com Share: Facebook Twitter Digg reddit document.write(lycos_ad['leaderboard']); document.write(lycos_ad['leaderboard2']); Last updated: October 2008 K EMPF D ATABASE O STRACODA FOSSIL AND LIVING OSTRACODA OF THE WORLD Welcome Publications New in 2008 New in 2004, 2006 ... Homepage Kempf Database Ostracoda W e l c o m e Welcome to the web page of the "Kempf Database Ostracoda". This database, until recently known mainly under the name "Cologne Database Ostracoda", is meanwhile in existence since more than 25 years. Aim of the database was and is to produce several kinds of novel works of reference in connection with bibliographies that lead to the whole literature on marine and nonmarine Ostracoda from 1758 onwards until nowadays. P u b l i c a t i o n s The works of reference produced by the "Kempf Database Ostracoda" are published in two series: "Index and Bibliography of Marine Ostracoda" and "Index and Bibliography of Nonmarine Ostracoda". Until now the following parts have appeared or are in preparation: INDEX AND BIBLIOGRAPHY OF MARINE OSTRACODA INDEX AND BIBLIOGRAPHY OF NONMARINE OSTRACODA PART 1: INDEX A over 40,000 taxa

72. Arthropods - Life On Australian Seashores A guide to these marine organisms and their biology. http://www.mesa.edu.au/friends/seashores/arthropods.html

Arthropods The Phylum Arthropoda contains the Insects, Spiders, Scorpions, Harvestmen, Ticks and Mites, and the Crustaceans , which include the Barnacles Isopods and Decapod Crabs In this LOARS Web Resource we are only concerned with the Arthropods which are found between the tides on rocky ocean shores. One of the major classes within the Crustacean group is the Malacostracans . This group contains the lobsters, crabs and prawns. See the diagram above for the Malacostracan body parts. Arthropods are a massive group of animals and have many more varieties, or species, than all the other groups combined. It is believed that 75% of all animals are Arthropods. The name arthropod is made up from " arthro " meaning joint, and " pod " meaning leg. Arthropod legs are highly adapted for walking, swimming, feeding and gathering sensory information. Some arthropods, such as

73. Amphipod General Biology Includes illustrations of anatomy and photographs. http://museumvictoria.com.au/crust/amphbiol.html

MUSEUM VICTORIA MELBOURNE MUSEUM SCIENCEWORKS IMMIGRATION MUSEUM ... Distribution Anatomy Two very different body shapes of amphipods are found in shallow marine environments, one long and skinny (skeleton shrimps or Caprellidea), the other compact (Gammaridea). In general gammarideans are flattened from side to side, but more accurately they are defined by the presence of three pairs of uropods (tail-limbs) and usually by having the first two pairs of legs modified to help with grasping food. There is no carapace; seven thoracic and six abdominal segments are visible. The head carries two pairs of antennae, the eyes which are not on stalks, and the mouthparts. Amphipods have seven pairs of walking legs of which the first four reach forward, and the fifth to seventh reach backwards. The abdomen is divided into two parts, three segments with brush-like limbs and three with short immobile rod-like uropods. Reproduction In some species of Amphipoda male sexual maturity is expressed by the development of bulging eyes and chemical receptors on the antennae. At this stage the amphipod is called a swimming male and he actively searches for a mate. During reproduction, the male amphipod carries the smaller female grasped between its legs, a condition known as amplexus. These mating amphipods can be seen swimming together in rockpools. The sperm are transferred from the male to the female genital duct. The female releases the eggs into a ventral brood chamber where they are incubated during development. The eggs are not attached (as in a crab) but are free in a space enclosed by extra branches of the walking legs. Unlike crabs and shrimps amphipods are not released as zoea that develop into adults after stages of metamorphosis. Instead when released they look very much like their parents. Some species show parental care of their young after they leave the brood chamber.

74. Heartbeat Of Crayfish of the mechanism of the crayfish heartbeat....... http://www.gsu.edu/~bioasx/zindex.htm

Welcome to Akira Sakurai's Home page (1998-2000) Dr. Jerrel L. Wilkens Lab, Dept. of Biological Sciences Univ. of Calgary, CANADA Heartbeat of crayfish In crayfish, the heart is located under the dorsal carapace of the thorax, suspended in the pericardial cavity by several ligaments. The heartbeat is neurogenic: The rhythm is determined by simple neural circuit in the heart called cardiac ganglion Research topicS Physiology of cardiac muscle There are at least three types of muscles in crustacean hearts. The cardiac muscle , the ostium muscle and the muscles of cardio-arterial valves. Ostium ( pl. ostia) is a valvular opening on heart wall, from which blood (hemolymph) flows into the heart... Chronic recording of cardio- regulation in free-living crayfish There are only a pair of cardio-inhibitory nerves and a pair of cardio-acceleratory nerves projecting out from the CNS to the heart. The heartbeat is always under control by these nerves and hormones. Go to Funa-mushi Shore Links Crustacean Neuroscience Say anything to Akira Sakurai! Background crawfishes drawn by TL Brenner Last updated: Apr. 6, 99

75. Underwater Field Guide To Ross Island & McMurdo Sound, Antarctica Photographs and information from the Underwater Field Guide to Ross Island and McMurdo Sound, Antarctica. http://www.peterbrueggeman.com/nsf/fguide/arthropoda-1.html

Field Guide ARTHROPODA : Crustacea ARTHROPODA : Crustacea amphipods, isopods, shrimp, ostracods, krill, etc. Click on each organism to view more information corophiid amphipod Haplocheira plumosa epimeriid amphipod Epimeria sp. epimeriid amphipod Epimeria sp., possibly Epimeria robusta eusirid amphipod Eusirus perdentatus eusirid amphipod Eusirus perdentatus or propeperdentatus eusirid amphipod probably Eusirus or Rhachotropis sp. eusirid amphipod Paramoera walkeri hyperiid amphipod Hyperia macrocephala iphimediid amphipod Echiniphimedia sp., possibly E. hodgsoni lysianassoid amphipod Abyssorchomene plebs lysianassoid amphipod Hippomedon kergueleni lysianassoid amphipod Orchomenella (Orchomenopsis) pinguides lysianassoid amphipod oedicerotid amphipod Monoculodes curtipediculus pagetinid amphipod Pagetina sp., probably Pagetina antarctica phoxocephalid amphipod Heterophoxus videns sebid amphipod Seba antarctica stenothoid amphipod Torometopa antarctica stenothoid amphipod probably Metopoides sp. arcturid isopod arcturid isopods on sea spiders chaetiliid isopod giant Antarctic isopod Glyptonotus antarcticus flabelliferan isopod Natatolana sp. or

76. Copepod Neuroecology The copepod nervous system, and sensory mechanisms, escape responses and bioluminescence. http://www.pbrc.hawaii.edu/~petra/copepod.html

Copepod Neuroecology (updated November 3, 2006) Page Index Mechanosensory mechanisms Structure-function studies of mechanosensory mechanisms Escape responses Myelin and escape responses ... Bioluminescence About this page The study of specializations of the nervous system and the effector systems it controls, in relation to the particular ecological niche an organism inhabits, may be termed "neuroecology." This covers a broad area from sensory input and central processing to motor output and behavior, studied in an ecological and evolutionary context. Because of the relative simplicity of copepod nervous systems, their very similar body plan and the great diversity of ecological niches they have penetrated, and barring only their small size, they make very appropriate animals for neuroecological studies. The following information is biased toward the expertise of the page creators, but we welcome input from others on content, and we hope to provide links to other pages on related topics. Mechanosensory Mechanisms in Copepods Nerve impulses can be recorded extracellularly from both mechanoreceptors and putative chemoreceptors (for details of methods, see

77. Welcome University of Oldenburg research group provides an introduction to the biology, ecology, ethology and systematic of copepods. Includes scanning electron photomicrographs. http://www.uni-oldenburg.de/zoomorphology/

Skip-links Jump to page content. Jump to bread-crumb navigation. Jump to navigation menue. Jump to global navigation of this university. ... Institut für Biologie und Umweltwissenschaften (IBU) Navigation Menue Zoosystematics und Morphology Location Sie sind hier: Uni Fak. Fk. V Biologie ... Zoomorphology (en) Welcome Zoosystematics and Morphology English-language content will be provided soon. Please refer to our german-language web pages for now. Help Search Imprint Style ... Wilko Ahlrichs Changed: 15.04.2004 Global navigation of this university Home page Search The university News ... Further training

78. Copepoda Class - Guide To The Marine Zooplankton Of South Eastern Australia Interactive tool providing a comprehensive, fully illustrated means of identification for the major zooplankton located in south eastern Australia. http://www.tafi.org.au/zooplankton/imagekey/copepoda/index.html

79. World Association Of Copepodologists Organization of investigators dedicated to research and education on all aspects of copepod biology. Publishes Monoculus, an online copepod newsletter. http://www.monoculus.org/

Home Main Menu Home History of Copepodology Officers By-Laws ... Gallery Username Password Remember Me Forgot your password? Forgot your username? World Association of Copepodologists Welcome to the website of the World Association of Copepodologists ! Copepods are among the most abundant metazoans on Earth and can be found almost everywhere there is water - from high-altitude lakes in mountain ranges, down to the depths of the ocean trenches. Copepods dominate the zooplankton, they are super-abundant in sediments, and they are parasitic on virtually every phylum of animals from sponges to chordates (including reptiles and mammals). This website will help you find out more about this fascinating group of crustaceans. The World Association of Copepodologists (WAC) is a nonprofit international organization whose purpose is to promote research on Copepoda by facilitating communication among interested specialists. Join today ! The business of the WAC is conducted primarily at a triennial business meeting held during each international conference on Copepoda. Since 1987, conferences have been held at venues in Asia, Africa, North and South America, and Europe. The last International Conference on Copepoda (our 10th) was held in Pattaya, Thailand in July 2008. To view and download a white paper resulting from the 2008 workshop on Copepod Genomics

80. Barnacle - Wikipedia, The Free Encyclopedia Information from Wikipedia on this distant relative of crabs and lobsters that lives cemented to rocks or other objects. http://en.wikipedia.org/wiki/Barnacle

Barnacle From Wikipedia, the free encyclopedia Jump to: navigation search For other uses, see Barnacle (disambiguation) Barnacle Fossil range: Mid Cambrian–Recent PreЄ O S D ... N "Cirripedia" from Ernst Haeckel's Kunstformen der Natur (1904). The crab at the centre is nursing the externa of the parasitic cirripede Sacculina Chthamalus stellatus Scientific classification Kingdom: Animalia Phylum: Arthropoda Subphylum: Crustacea Class: Maxillopoda Subclass: Thecostraca Infraclass: Cirripedia Burmeister Superorders Acrothoracica Thoracica ... Synonyms Thyrostraca, Cirrhopoda (meaning "curl-footed"), Cirrhipoda, and Cirrhipedia. A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacea , and is hence related to crabs and lobsters . Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive settings. They are sessile suspension feeders , and have two nektonic larval stages. Around 1,220 barnacle species are currently known. The name "Cirripedia" is Latin , meaning "curl-footed". Contents Ecology Adult anatomy Parasitic barnacles Life cycle ... edit Ecology Semibalanus balanoides feeding Barnacles are encrusters, attaching themselves permanently to a hard substrate. The most common, "acorn barnacles" (

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 4     61-80 of 104    Back | 1  | 2  | 3  | 4  | 5  | 6  | Next 20