Portal:Arthropods

edit   Arthropods Portal Arthropods make up the largest phylum of animals (Phylum Arthropoda) and include the insects, arachnids, crustaceans and others. More than 80% of described living animal species are arthropods, with over a million modern species described and a fossil record reaching back to the late Proterozoic era. Arthropods are common throughout marine, freshwater, terrestrial, and even aerial environments, and includes various symbiotic and parasitic forms. They range in size from microscopic plankton (~¼ mm) up to forms several metres across. Arthropods are characterised by the possession of a segmented body with appendages on each segment. They have a dorsal heart and a ventral nervous system. All arthropods are covered by a hard exoskeleton made of chitin, a polysaccharide which protects against trauma and desiccation. They shed this covering periodically when moulting. Examples of the five arthropod subphyla Trilobitomorpha: Kainops invius Chelicerata: Eriophora transmarina Myriapoda: Scolopendra cingulata Hexapoda: Drosophila melanogaster Crustacea: Cancer pagurus edit   Selected article Colony collapse disorder (CCD) is a phenomenon in which worker bees from a beehive or European honey bee colony abruptly disappear. While such disappearances have occurred throughout the history of apiculture, the term colony collapse disorder was first applied to a drastic rise in the number of disappearances of Western honey bee colonies in North America in late 2006. Colony collapse is economically significant because many agricultural crops worldwide are pollinated by bees. The cause or causes of the syndrome are not yet fully understood. In 2007 some authorities attributed the problem to biotic factors such as Varroa mites and insect diseases (i.e., pathogens including Nosema apis and Israel acute paralysis virus). Other proposed causes include environmental change-related stresses, malnutrition, pesticides (e.g.. neonicotinoids such as clothianidin and imidacloprid), and migratory beekeeping. edit   Did you know ... ? ... that larvae of Cuban endemic firefly Alecton discoidalis attack land snails (pictured)? ... that the only known specimen of the extinct planthopper Glisachaemus jonasdamzeni is preserved with a parasitic mite? ... that cycloids are believed to have been driven to extinction when crabs spread across their territory? ... that the extinct trapdoor spiders Baltocteniza and Electrocteniza were both identified from specimens in Baltic amber? ... that the only known specimen of the extinct spider Palaeoperenethis is in the Royal Ontario Museum? ... that the extinct planthopper Tainosia quisqueyae was named for the Taíno people and Hispaniola? edit   Recognised content Featured articles Ant Chrysiridia rhipheus Cochineal Henry Edwards (entomologist) Shrimp farm Featured lists List of Odonata species of Great Britain Good articles Abantiades latipennis Andreacarus voalavo Arthropod Bees and toxic chemicals Black bean aphid California spiny lobster Cancer pagurus Cape lobster Caprella mutica Carcinus maenas Chelicerata Chirocephalus diaphanus Coconut crab Colony collapse disorder Crustacean Cultural depictions of spiders Dyspanopeus sayi Earwig External morphology of Lepidoptera Hemigrapsus estellinensis Hemilepistus reaumuri Homarus gammarus Insect Insect wing Johngarthia lagostoma Katipo Lepidoptera Lulworth Skipper Maevia inclemens Metanephrops challengeri Neotrypaea californiensis Nephrops norvegicus Opabinia Phaeacius Polish cochineal Polistes exclamans Portia fimbriata Portia labiata Potamon fluviatile Scyllarides latus Seychellum Sirex woodwasp Sphecius grandis Spider Timema Trogloraptor Waptia Worker policing Zygoballus sexpunctatus Featured images Featured image set: butterfly wing magnifications edit   WikiProjects WikiProject Tree of Life WikiProject Animals WikiProject Arthropods WikiProject Spiders WikiProject Insects WikiProject Lepidoptera What are WikiProjects? edit   Selected picture The Sally Lightfoot crab, Grapsus grapsus, is a shore crab that lives from the Gulf of California to the Galápagos Islands. edit   Taxa Chelicerata: spider · Acari · Opiliones · pseudoscorpion · scorpion · Solifugae · sea spider · Schizomida · Amblypygi · Thelyphonida · Palpigradi · Ricinulei · Xiphosura · †Eurypterida Crustacea: Malacostraca (Decapoda – crab, lobster, hermit crab; Amphipoda; Isopoda; mantis shrimp) · Maxillopoda (barnacle; copepod) · Branchiopoda (fairy shrimp; Triops; Daphnia) · ostracod · Remipedia · Cephalocarida Hexapoda: Entognatha (springtail; Diplura; Protura) · insect (beetle; fly; bee; wasp; ant; butterfly; moth; cockroach; flea; louse; mayfly; dragonfly; damselfly; earwig; mantis) Myriapoda: centipede · millipede (pill millipede) · Pauropoda · Symphyla · †Arthropleuridea †Trilobite: †Agnostida · †Asaphida · †Corynexochida · †Harpetida · †Nectaspida · †Redlichiida · †Lichida · †Phacopida · †Proetida · †Ptychopariida † indicates an extinct taxon. edit   Topics Anatomy: antenna · arthropod exoskeleton · arthropod leg · arthropod eye · book lung · chelicerae · differences between butterflies and moths · gill · insect morphology · invertebrate trachea · Malpighian tubule system · mandible · rostrum · simple eye in invertebrates Study: arachnology · entomology · forensic entomology · glossary of entomology terms · lepidopterist · list of carcinologists · list of entomologists · myrmecology · timeline of entomology Development: crustacean larvae · ecdysis · exuvia As food: entomophagy · fried spider · crab fisheries · lobster fishing · shrimp paste Miscellaneous: arthropod bites and stings · beneficial insects · economic entomology · endangered arthropod · evolution of insects · insectivore edit   To do Here are some tasks you can do: Start a new article. Arthropods cover an huge range of taxa and other topics, so there will always be plenty of missing articles. Some which have been explicitly requested are listed here. Clean up existing articles. Lists of articles needing cleanup are available either grouped by the work needed or ungrouped. Expand an existing article. Existing articles are often incomplete and missing information on key aspects of the topic. It is particularly important that the most widely read articles be broad in their scope. Wikipedia:WikiProject Arthropods/Popular pages (updated monthly) shows the number of views each article gets, along with assessments of its quality and importance. Articles with higher importance ratings and greater numbers of views are the priority for article improvements, but almost all our articles would benefit from expansion. Stubs can be found in Category:Arthropod stubs and its subcategories. edit   Categories To display subcategories, click on the triangle: ► Arthropods edit   Related portals Biology • Agriculture and Agronomy • Animals  • Arthropods • Amphibians and Reptiles • Biotechnology • Birds • Cats • Cetaceans • Crustaceans • Dinosaurs • Dogs • Dentistry • Extinction • Evolutionary biology • Fish • Insects • Marine life • Medicine • Metabolism • Mind and Brain • Molecular and Cellular Biology • Neuroscience • Plants • Sharks edit   Associated Wikimedia What are portals? List of portals Featured portals