1. Crustacea.net - Interactive Keys Provides an interactive information retrieval system for the world crustaceans. http://crustacea.net/

Home Introduction World Crustacea Abbreviations ... Australian Mysidacea database now available The new Australian version of the Mysidacea database is now available to view. An Australian Museum website

2. Crustacean - Wikipedia, The Free Encyclopedia crustaceans (crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill http://en.wikipedia.org/wiki/Crustacean

Crustacean From Wikipedia, the free encyclopedia Jump to: navigation search Crustacea PreЄ O S D ... Cambrian to Recent Abludomelita obtusata , an amphipod Scientific classification Kingdom: Animalia Phylum: Arthropoda Subphylum: Crustacea Brünnich Classes Subclasses Thylacocephala ... Eumalacostraca Crustaceans Crustacea ) form a very large group of arthropods , usually treated as a subphylum , which includes such familiar animals as crabs lobsters crayfish shrimp ... krill and barnacles . The 50,000 described species range in size from Stygotantulus stocki Japanese spider crab arthropods , crustaceans have an exoskeleton , which they moult to grow. They are distinguished from other groups of arthropods, such as insects myriapods and chelicerates by the possession of biramous (two-parted) limbs, and by the nauplius form of the larvae Most crustaceans are free-living aquatic animals , but some are terrestrial (e.g. woodlice ), some are parasitic (e.g. fish lice tongue worms ) and some are sessile (e.g. barnacles ). The group has an extensive fossil record , reaching back to the Cambrian , and includes living fossils such as Triops cancriformis , which has existed apparently unchanged since the Triassic period. More than 10 million tons of crustaceans are produced by fishery or farming for human consumption, the majority of it being

3. Crustacea - Definition And Meaning From Wordnik crustacea Dictionary definitions and example sentences of crustacea on Wordnik.com http://www.wordnik.com/words/Crustacea

Sign up! Sign in Zeitgeist Word of the day ... Random word Username Password ( Forgot? or Using Facebook Connect logs you in to Wordnik whenever you are logged in to Facebook. Not a member yet? Sign up for an account Crustacea Add to favorites Add to a list Link to this word [x] ... Tweet Definitions Thesaurus Examples Pronunciations Comments Crustacea in [x] No definitions are available for Crustacea. Examples If we go still further back in time, we discover, in the oldest rocks of all, the remains of animals, constructed on the same general plan as the lobster, and belonging to the same great group of ' Crustacea '; but for the most part totally different from the lobster, and indeed from any other living form of crustacean; and thus we gain a notion of that successive change of the animal population of the globe, in past ages, which is the most striking fact revealed by geology. Lectures and Essays Within the Park 43 scleractinian (hard coral) and 10 alcyonacean (soft coral) genera, 14 sponges, 4 tunicates, 812 species of marine and estuarine mollusks (72% of Kwazulu-Natal coastal species), including the giant clams Tricdaca maxima and T. squamosa, and 198 species of Crustacea have been recorded.

4. Natural History Collections: Crustacea SUBPHYLUM crustacea. crustaceans (42000 species) are distinguished from Chelicerates and Uniramians by their branched limbs. crustaceans are mainly an aquatic group; only slaters and http://www.nhc.ed.ac.uk/index.php?page=24.25.312.330.363

5. Crustacea Taxonomy reference information. http://tolweb.org/tree?group=Crustacea&contgroup=Arthropoda

6. Crustacea: Definition From Answers.com A class of arthropod animals in the subphylum Mandibulata having jointed feet and mandibles, two pairs of antennae, and segmented, chitinencased bodies. http://www.answers.com/topic/crustacea-2

7. Crustacea The Subphylum crustacea belongs to the Phylum Arthropoda. It is a diverse group that includes crabs, lobsters, shrimps, ostracods, barnacles and woodlice. http://palaeo.gly.bris.ac.uk/Palaeofiles/Fossilgroups/Crustacea/anatomy.html

Crustacea The Subphylum Crustacea belongs to the Phylum Arthropoda. It is a diverse group that includes crabs, lobsters, shrimps, ostracods, barnacles and woodlice. The Crustacea is the most diverse group of arthropods after the insects, including over 800 families, and many subgroups The most common body plan is a tripartite arrangement, consisting of a head, thorax, and abdomen . Unlike the insects, where the head and thorax are separated by a flexible joint, in the Crustacea they are almost always rigidly fused together. Sometimes the head and thorax are covered by a carapace, producing a single functional unit known as a cephalothorax . Some species have a prominent anterior projection from this cephalothorax called the rostrum The Crustacea are characterized by these features: Body composed of a 5-segmented head and a more or less distinct thorax and abdomen. Abdomen composed of 6 segments. Cephalic shield or carapace usually present. Appendages are multiarticulate and biramous (or secondarily uniramous in the case of limbs). Mandibles are multiarticulate limbs that function as basic jaws.

8. Australian Amphipoda: Families Introduction to these crustaceans with monographs and interactive keys to many of the families. http://www.crustacea.net/crustace/amphipoda/

Home Introduction World Crustacea Amphipoda ... Workshops Amphipoda: Families J.K. Lowry and R.T. Springthorpe Division of Invertebrate Zoology The Australian Museum 6 College Street, Sydney, NSW 2010, Australia Phone: 612 9320 6260 Fax: 612 9320 6050 Email: jimlowry@crustacea.net rogers@austmus.gov.au Monographs and Interactive Keys Introduction Amphipods are extremly diverse, abundant and widespread crustaceans. They are found in nearly all marine and freshwater habitats. They are paticularly important as herbivores, detritivores, micropredators and scavengers in marine environments and they are almost always an important component of marine and freshwater environmental surveys. For these reasons and many others it is important to be able to identify amphipods. This has always been a problem for non-amphipod specialists because they are usually small, they all "look alike" and they often need to be dissected to be identified. Consequently they are often referred to in published ecological studies and environmental surveys as Amphipods or gammaridean Amphipods. These keys make minimal use of mouthparts for identification purposes and they should almost never have to be used. This means that dissection is minimal and may be confined to taking off the head to get a better look at the anteroventral corner, taking off an anterior leg to see it chelation or a urosome to evaluate the cleftness of the telson.

9. Crustacea 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 http://tolweb.org/tree?group=Crustacea&contgroup=Arthropoda

10. Crustacea Index: Guide To Singapore Mangroves From A Guide to Mangroves of Singapore , Peter K. L. Ng and N. Sivasothi (editors) Volume 1 The Ecosystem and Plant Diversity and Volume 2 Animal Diversity http://mangrove.nus.edu.sg/guidebooks/text/fauna4.htm

CONTENTS Flora index Fauna index Index of mangrove fauna: invertebrates Peter K L Ng and N Sivasothi (editors) CRUSTACEA About crustacea in general Prawns Marine prawns Penaeus and Metapenaeus spp. Estuarine prawn Macrobachium equidens Mangrove hairy-handed prawn Caridina propinqua Mangrove snapping prawns Alpheus spp. Other crustacea Mangrove sea slater Ligia hawaiiensis Warty pill bug Sphaeroma terebrans Mangrove mud hopper Microrchestia sp. Crabs Family Grapsidae Paddler crab Varuna yui Purple climber crabs Metopograpsus spp. Sesarmine crabs Tree-climbing/Vinegar crabs Episesarma spp. Mangrove tree-dwelling crab Selatium brockii Orange signaller crab Metaplax elegans Family Eriphiidae Stone/thunder crab Myomenippe hardwicki Forceps crab Epixanthus dentatus Family Portunidae Orange mud crab Scylla olivacea and other mud crabs Flower crab Portunus pelagicus Family Ocypodidae Soldier crab Dotilla myctiroides Fiddler crabs Uca spp. Semaphore crabs Ilyoplax spp.

11. Crustacea - LoveToKnow 1911 crustacea, a very large division of the animal kingdom, comprising the familiar crabs, lobsters, crayfish, shrimps and prawns, the sandhoppers and woodlice, the strangely modified http://www.1911encyclopedia.org/Crustacea

Crustacea From LoveToKnow 1911 CRUSTACEA, a very large division of the animal kingdom, comprising the familiar crabs, lobsters, crayfish , shrimps and prawns, the sandhoppers and woodlice, the strangely modified barnacles and the minute water-fleas. Besides these the group also includes a multitude of related forms which, from their aquatic habits and generally inconspicuous size, and from the fact that they are commonly neither edible nor noxious, are little known except to naturalists and are undistinguished by any popular names. Collectively, they are ranked as one of the classes forming the sub-phylum Arthropoda , and their distinguishing characters are discussed under that heading. It will be sufficient here to define them as Arthropoda for the most part of aquatic habits, having typically two pairs of antenniform appendages in front of the mouth and at least three pairs of post-oral limbs acting as jaws. As a matter of fact, however, the range of structural variation within the group is so wide, and the modifications due to parasitism and other causes are so profound, that it is almost impossible to frame a definition which shall be applicable to all the members of the class. In certain parasites, for instance, the adults have lost every trace not only of Crustacean but even of Arthropodous structure, and the only

12. Crustaceans (Crustacea) On The Shores Of Singapore Fact sheet with photos on flora and fauna of Singapore's intertidal shores http://www.wildsingapore.com/wildfacts/crustacea/crustacea.htm

wildsingapore homepage wildfactsheets homepage wild shores of singapore blog all animals ... search crustacea text index photo index Phylum Arthropoda moulting Crustaceans Subphlum Crustacea updated Dec 08 if you learn only 3 things about them ... Crustaceans are the largest group of marine arthropods. Surprising crustaceans include barnacles, sea slaters. Crustaceans belong to Phylum Arthropoda which includes insects, spiders, centipedes. Crustaceans are among our favourite seafood! Having to personally dismantle some of these creatures to eat them, many of us are more familiar with them than we might imagine. What are crustaceans? If crustaceans remind you of insects, they are indeed related and belong to the same Subphylum. Together with more familiar creatures like spiders and centipedes, they all belong to the Phylum Arthropoda . Crustaceans are the largest group of marine arthropods. There are about 45,000 known species of crustaceans. More than 80% of these are marine.

13. Nonindigenous Aquatic Species Describes common methods of introduction, with links to descriptions of species and US distribution maps. http://nas.er.usgs.gov/taxgroup/Crustaceans/

USGS Home Contact USGS Search USGS NAS - Nonindigenous Aquatic Species Home About NAS Staff FAQ ... Partners Products Powerpoints Posters Reports Plant Datbase Workshop USFWS Region 4 Report USFWS Region 5 Report Report A Species ... By e-mail Phone 877-STOP-ANS Alert System Browse Archive Flowchart-How It Works About ... By e-mail Phone 877-STOP-ANS NAS Database Text Queries Simple Advanced ... By e-mail Phone 877-STOP-ANS Data Entry (Internal) Taxa Information Plants Vertebrates ... Laws Crustaceans Crustaceans (Phylum Arthropoda, Class Crustacea) are found in marine, brackish and fresh waters. Common methods of introduction include ballast water discharge, intentional release as forage for sport fish, and accidental release from aquaculture facilities. Potential impacts include competition with, and predation on, native species. The opossum shrimp, Mysis relicta , was first introduced into Kootenay Lake, British Columbia, in 1949 and was widely stocked as a forage food for sport fish in the West. It is an opportunistic feeder with both predatorial and filter feeding habits. Dramatic changes in native zooplankton communities, including species extinctions, have been observed after opossum shrimp were introduced. After the introduction of the opossum shrimp into Flathead Lake, Montana, Daphnia longiremis and Leptodora kindti were reduced to undetectable levels while Diaptomus ashlandi declined more than 75% from previous levels.

14. Crustacea Definition Of Crustacea In The Free Online Encyclopedia. crustacea krə′stā shə (invertebrate zoology) A class of arthropod animals in the subphylum Mandibulata having jointed feet and mandibles, two pairs of antennae, and http://encyclopedia2.thefreedictionary.com/Crustacea

15. Crustacea - Definition The crustaceans (crustacea) are a large group of arthropods (55,000 species), usually treated as a subphylum. They include various familiar animals, such as lobsters, crabs, shrimp http://www.wordiq.com/definition/Crustacea

Crustacea - Definition Crustaceans Hyalella azteca Scientific classification Kingdom: Animalia Phylum: Arthropoda Subphylum: Crustacea Classes Remipedia Cephalocarida Branchiopoda Ostracoda Maxillopoda Malacostraca The crustaceans (Crustacea) are a large group of arthropods species ), usually treated as a subphylum. They include various familiar animals, such as lobsters crabs shrimp and barnacles . They are variously found in marine and freshwater, with a few terrestrial members (such as woodlice Contents showTocToggle("show","hide") 1 Structure of crustaceans 2 Reproduction 3 Taxonomy 3.1 Classes, subclasses and infraclasses of crustaceans ... 5 External links Structure of crustaceans Crustaceans have three distinct body parts: head, thorax, and abdomen. They have two pairs of antennae on the head, compound eyes , three pairs of mouthparts and a telson . Smaller crustaceans respire through their body surface by diffusion and larger crustaceans respire with gills . Crustaceans typically have a thick carapace on the dorsal side of their body. Their appendages are typically biramous, including the second pair of antennae (but not the first). One may note that many crustaceans are particularly unpleasant looking (see picture to the right).

16. Index To Crustaceans Of Southern Australia Guide to the diverse fauna of the Victorian coastline. http://museumvictoria.com.au/crust/

17. ADW: Crustacea: Information Approximately 30,000 species make up this Subphylum. Most are aquatic; of these, the majority are marine but some are found in fresh water. Members of the Subphylum include http://animaldiversity.ummz.umich.edu/site/accounts/information/Crustacea.html

Overview News Technology Conditions of Use ... Home Kingdom Animalia Phylum Arthropoda Subphylum Crustacea Subphylum Crustacea crustaceans Information Pictures Specimens Classification editLink('skunkworks/.accounts/200310302520') 2010/10/09 01:05:20.937 GMT-4 By Phil Myers Kingdom: Animalia Phylum: Arthropoda Subphylum: Crustacea Members of this Subphylum Approximately 30,000 species make up this Subphylum. Most are aquatic; of these, the majority are marine but some are found in fresh water. Members of the Subphylum include lobsters, crabs, crayfish, shrimp, copepods, barnacles, and several other groups of organisms. All have two pairs of antennae, a pair of mandibles, a pair of compound eyes (usually on stalks), and two pair of maxillae on their heads, followed by a pair of appendages on each body segment (crustacean bodies usually are made up of head, thorax, and abdomen, although the segments composing these tagmata differ among different Classes). The appendages are primitively branched (biramous), and although this condition is modified in many species, adults always have at least some biramous appendages. Crustaceans respire via gills. Like other arthropods, all have a hard but flexible exoskeleton. Most crustaceans are free-living, but some are sessile and a few are even parasitic. Most use their maxillae and mandibles to take in food. The walking legs, including specialized chelipeds, may be used to help capture prey. Some crustaceans filter tiny plankton or even bacteria from the water; others are active predators; while still others scavenge nutrients from detritus.

18. 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/dictionary/crustacea

19. The Crustacea (Subphylum Crustacea) An introduction to the biology, classification and ecology of prawns, shrips crabs lobsters and their allies, the subphylum crustacea http://earthlife.net/inverts/crustacea.html

The Crustacea Crabs, Prawns, Shrimps and Lobsters, but also Woodlice and Barnacles are but a few of the wonderfully diverse members of the group of organisms known as the Crustacea. The Crustaceans are only the third largest of the great Arthropod subphylla, containing a lower number of species than either the insects or the arachnids. However in terms of diversity of form they exceed both these groups together. This great flexibility of structure, along with the general successfulness of the Arthropod plan (exoskeleton and jointed limbs) has enabled them to be extremely successful as a group of animals. However it has also made it almost impossible to describe a typical Crustacean. All Crustacea can be distinguished from the other groups of Arthropods by the possession of two pairs of antennae, and by the presence of biramous limbs. Biramous limbs have a second section or branch, so they look in fact like two limbs stuck together (see diagram), the limbs of people, spiders and insects are all uniramous. The Crustacea are an ancient group of organisms with a fossil record stretching back to the early Cambrian 600 million years ago. There is a Russian fossil of a 12 legged Sea Spider called

20. Crustacea - Barnacles -- Discover Life Discover Life's encyclopedia page about the biology, natural history, ecology, identification and distribution of crustacea Barnacles Discover Life http://www.discoverlife.org/mp/20o?search=Crustacea

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