41. Echinodermata PHYLUM echinodermata. SUBPHYLUM Crinozoa CLASS Crinoidea Sea Lilies and Feather stars; SUBPHYLUM Asterozoa CLASS Stelleroidea SUBCLASS Asteroidea Sea stars http://faculty.vassar.edu/mehaffey/academic/animalstructure/outlines/echinoderma

Outlines Biology 226 Home Page PHYLUM ECHINODERMATA SUBPHYLUM Crinozoa CLASS Crinoidea: Sea Lilies and Feather stars SUBPHYLUM Asterozoa CLASS Stelleroidea SUBCLASS Asteroidea: Sea stars ORDER Platyasterida: primative stars, only two genera ORDER Paxillosida ORDER Valvatida ORDER Spinulosida: stars with 5-18 arms ORDER Forcipulatida: stars with 5-50 arms SUBCLASS Ophiuroidea: Brittle stars and basket stars CLASS Concentricycloidea: Sea daisies. Discoidal body without radiating arms. SUBPHYLUM Echinozoa CLASS Echinoidea: Sea urchins and sand dollars SUBCLASS Perischoechinoidea: most primative members of the class. Pencil urchins. SUBCLASS Euechinoidea: "true" sea urchins SUPERORDER Diadematacea SUPERORDER Echinacea SUPERORDER Gnathostomata ORDER Holectypoida ORDER Clypeasteroida: "true" sand dollars SUPERORDER Atelostomata: "irregular" urchins CLASS Holothuoidea: Sea Cucumbers SUBCLASS Dendrochirotacea: with 8-30 oral tentacles SUBCLASS Aspidochirotacea: with 10-30 leaflike or shieldlike oral tentacles. SUBCLASS Apodacea: with up to 25 tentacles, digitate to pinnate

42. Echinodermata - Definition Of Echinodermata By The Free Online Dictionary, Thesa E`chi`no`der ma`ta (ė`kī`n `dẽr m `t ) n. pl. 1. (Zool.) One of the grand divisions of the animal kingdom. By many writers it was formerly included in the Radiata. http://www.thefreedictionary.com/Echinodermata

43. ADW: Echinodermata: 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. http://animaldiversity.ummz.umich.edu/site/accounts/classification/Echinodermata

Overview News Technology Conditions of Use ... Home Kingdom Animalia Phylum Echinodermata Phylum Echinodermata (echinoderms) Information Pictures Specimens 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 Kingdom Animalia (animals) Eumetazoa (metazoans) Bilateria (bilaterally symmetrical animals) Deuterostomia (deuterostomes) Phylum Echinodermata (echinoderms) Class Echinoidea (heart urchins, sand dollars, and sea urchins) Class Holothuroidea (sea cucumbers) Subclass Ophiuroidea (basket stars, brittlestars, and snake stars)

44. Echinodermata (Phylum) Information about the Phylum echinodermata including photos, maps, and text. http://zipcodezoo.com/Key/Animalia/Echinodermata_Phylum.asp

45. Echinodermata Sea Stars Feather Stars Sea Urchins Phuket Coral Reef Ecology Guid echinodermata Sea Stars Feather Stars Sea Urchins Phuket coral reef ecology guide Thailand Similan Burma fishes, cnidarians, sponges marine worms, crustaceans, molluscs http://www.diveasia.com/reef-guide/echinoderms.htm

Home Liveaboard Cruises Liveaboard Cruises The Boats ... Contact Us Quick Search Start Date Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec End Date Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Activities Liveaboard Day Trips Diving Courses Discover Scuba Diving Scuba Review PADI SCUBA Diver PADI Open Water Diver eLearning OWD Advanced Open Water Diver eLearning AOW Enriched Air Nitrox Diver eLearning Nitrox DSAT Gas Blender Specialty Courses Emergency First Response Rescue Diver Professional Courses Divemaster IDC Prep IDC IDC Staff Instructor Crossover/OWSI EFR Instructor Instructor Examination Master Scuba Diver Trainer eLearning IDC Deutsche Seiten Live Chat with Skype Dive Asia NEWS ... BLOG Latest Entry: Dive for Dogs Charity 24 Hour Hotline +66(0)818953320 Welcome Fishes Cnidarians Echinoderms Crustaceans Molluscs Reptiles Reef Ecology Guide Phuket Thailand - Echinoderms ECHINODERMS All echinoderms are characterized by a radial symmetry, which is very obvious in most starfishes. Also common to all echinoderms is a remarkable water vascular system, serving as locomotion. Water is drawn into the system through a sieve plate on the upper surface and conveyed to the arms by a series of canals. Many echinoderms serve as hosts to a variety of symbiotic or parasitic organisms.

46. What Does Echinodermata Mean? Definition And Meaning (Free English Language Dict Definition of echinodermata in the AudioEnglish.net Dictionary. Meaning of echinodermata. What does echinodermata mean? Proper usage of the word echinodermata. Information about http://www.audioenglish.net/dictionary/echinodermata.htm

47. Echinodermata Echinoderms are the closest relatives to Chordates. It may not seem so at first, but looking closely at embryological evidence, it is believed that chordates and echinoderms http://www.bio200.buffalo.edu/labs/echinoderms.html

Echinodermata Echinoderms are the closest relatives to Chordates. It may not seem so at first, but looking closely at embryological evidence, it is believed that chordates and echinoderms shared a common relative. This relative is believed to have been something along the lines of sea urchin - an orgasnism a bit larger than a golf ball with spines extending radially like the guy from Hellraiser. Interesting little creatures, they aren't especially intelligent. In fact, they don't do much of anything. Keep in mind that "close" is a relative term. New York and Sydney are close compared to the distance between the earth and Jupiter. It is all a matter of context. In evolution, the context is a matter of many millions of years. Classification of Echinoderms Kingdom Animalia - they're animals Subkingdom Eumetazoa - echinoderms have organs Branch Bilateria - in their early early stages, they all have bilateral symmetry. Grade Coelamata - they have body cavities Subgrade Enterocoela - the mesoderm pouches to form a true body cavity Phylum Echinodermata - echinoderms Subphylum Crinozoa - radially symmetric as ADULTS, with an upward mouth

48. Echinodermata - Palaeos.org (check the following menu and phylogeny the taxon in bold refers to the topic on this page) http://www.palaeos.org/Echinodermata

Echinodermata From Palaeos.org Jump to: navigation search Parent taxa: (check the following menu and phylogeny - the taxon in bold refers to the topic on this page) DEUTEROSTOMIA Taxonomy Phylogeny Domain ... Chordata Phylum: Echinodermata Phylum: Hemichordata Phylum: Vetulicolia Bilateria Deuterostomia Vetulicolia ... Edrioasteroidea Echinodermata Chordata Urochordata Cephalochordata Craniata ... Vertebrata Deuterostomia topics: Fossil Record Characteristics The Fall and Rise of Orders of Symmetry Ecology and Lifestyle ... References Echinodermata Cambrian to Recent Crown-of-thorns starfish ( Acanthaster planci Contents Introduction Classification Phylogeny Dendrogram ... Credits Introduction The echinoderms (or "spiny skins") are a diverse group of completely marine animals. They are known from the Cambrian to the Recent and are found in shallow marine waters as well as the deep abyssal plains. They have a soft body encased in a hard rigid shell or exoskeleton (called a test ) made of individual plates (or ossicles ) made up of numerous thin plates. Many echinoderms have spines covering their test (e.g. the sea urchin). This group includes such familiar sea-shore creatures as starfish and sea urchins, as well as a number of less known types, and a whole range of paleozoic forms that are no longer around. There are some 6000 recent species, distributed among five classes. But these are only a small fraction of the number and diversity of types that lived in past ages, especially during the Paleozoic era when the group was at its height.

49. Echinodermata@Everything2.com The echinoderm (as Webster points out in the node echinodermata) is a marine animal. The name itself comes from Greek ' echino ' meaning spike and ' derm ' meaning skin (compare to the http://everything2.com/title/Echinodermata

50. ITIS Standard Report - Error Kingdom Animalia Taxonomic Rank Phylum Synonym(s) Common Name(s) bolacha da praia Portuguese chinodermes French echinoderms English http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_valu

51. Phylum Echinodermata - Echinoderms Phylum echinodermata Echinoderms Crinoids Starfish The echinodermata, (from the Greek meaning spiny skin), is a phylum containing some 13,000 extinct http://www.fossilmuseum.net/Tree_of_Life/Phylum-Echinodermata.htm

Phylum Echinodermata - Echinoderms Tree of Life Phylum Echinodermata Kingdon Animalia Of related interest: Crawfordsville Indiana Crinoids Crinoids and Echinoderms The Echinodermata, (from the Greek meaning spiny skin), is a phylum containing some 13,000 extinct and 7,000 extant species. Living representatives are only found in marine environment, making the phylum the largest lacking terrestrial and fresh water forms. Echinoderms evolved from bilaterally symmetric animals exhibiting fivefold radial symmetry in portions of their body at some stage of life. This pentameral symmetry is readily apparent in familiar adult starfish and sand dollars. Other echinoderms both extant and extinct lack the five point morphology because it was lost somewhere during development (i.e., during ontogeny Echinoderms have a vascular system that carries water and which in some echinoderms end in suckered feet enabling the creature to grip and move objects. Reproduction in Echinoderms reproduction is usually via external fertilization through eggs and sperm discharged into the water, and the majority of echinoderms have several planktonic larval stages before reverting to a

52. ECHINODERMATA Table of Contents . echinodermata ( ECHINOIDEA ) Echinarachnius parma. LIVING MATERIAL. The common sand dollar is found in isolated areas on sandy bottoms below low tide level http://www.mbl.edu/BiologicalBulletin/EGGCOMP/pages/79.html

Table of Contents ECHINODERMATA ( ECHINOIDEA ) Echinarachnius parma LIVING MATERIAL The common sand dollar is found in isolated areas on sandy bottoms below low tide level, and is obtained in abundance by dredging at West Barnstable on Cape Cod Bay, Mass. The sexes are separate, but it is impossible to distinguish the male from the female by superficial examination. The animals breed abundantly at Woods Hole, Mass., from at least the last week of March to the end of July; even in August, a limited amount of ripe gametes may be obtained (Bumpus, 1898a, 1898b; Mead, 1898). A. Care of Adults: The adults may be kept indefinitely in an aquarium provided with a layer of clean sand and a continuous supply of fresh sea water. They can be fed on kelp, mussels, and other marine plants and animals. B. Procuring Gametes: Tyler's method (1949) for procuring gametes is to inject isosmotic KCI (0.5 M) with a hypodermic syringe into the body cavity of the sand dollar, inserting the needle (25-27 gauge, 1/2- to 3/4-inch) through the mouth in a direction as nearly parallel as possible to the oral surface. A single injection of 0.5 cc. of 0.5 M KCI into an animal about 30 cc. in volume will induce shedding of virtually all the ripe eggs or sperm. For smaller animals, the dose should be proportionately smaller (0.5-0.2 cc.). Shedding starts within a few

53. Echinoderms (starfish, Brittle Star, Sea Urchin, Feather Star, Sea Cucumber) s of the major species of echinodermata (starfish, brittle star, sea urchin, feather star, sea cucumber) with illustrations and links to photos....... http://www.starfish.ch/reef/echinoderms.html

Starfish reef Invertebrate – Animals that lack a back-bone (vertebrae). Invertebrates Diese Seite auf Deutsch Multi-celled animals (Metazoa) Top End ECHINODERMS 5 pages with over 300 photos of echinoderms ECHINODERMS (Echinodermata) There are 5 related classes in the phylum Echinodermata (the Latin name means "spiny-skinned"). For a detailed list with all classifications click here Sea star or starfish (Asteroidea) Brittle stars, basket stars, serpent stars (Ophiuroidea) Sea urchins, heart urchins and sanddollars (Echinoidea) ... Feather stars and sea lilies (Crinoidea) Characteristics of Echinoderms Echinoderms are characterized by radial symmetry, several arms (5 or more, mostly grouped 2 left - 1 middle - 2 right) radiating from a central body (= pentamerous). The body actually consists of five equal segments, each containing a duplicate set of various internal organs. They have no heart, brain, nor eyes, but some brittle stars seem to have light sensitive parts on their arms. Their mouth is situated on the underside and their anus on top (except feather stars, sea cucumbers and some urchins). Echinoderms have tentacle-like structures called tube feet with suction pads situated at their extremities. These tube feet are hydraulically controlled by a remarkable vascular system. This system supplies water through canals of small muscular tubes to the tube feet (= ambulacral feet). As the tube feet press against a moving object, water is withdrawn from them, resulting in a suction effect. When water returns to the canals, suction is released. The resulting locomotion is generally very slow.

54. Biology: Echinodermata - CliffsNotes The phylum echinodermata includes members having an internal skeleton and a waterbased pressure system for locomotion. The embryo of echinoderms is different from that http://www.cliffsnotes.com/study_guide/Echinodermata.topicArticleId-8741,article

CliffsNotes - The Fastest Way to Learn My Cart My Account Help Home ... Biology Echinodermata The Science of Biology Introduction to Biology Characteristics of Living Things Scientific Method The Chemical Basis of Life Elements and Atoms Acids and Bases Molecules Organic Compounds The Biology of Cells Cells Defined Prokaryote and Eukaryote Cell Structure Movement through the Plasma Membrane Cells and Energy The Laws of Thermodynamics Chemical Reactions Enzymes Adenosine Triphosphate (ATP) ... ATP Production Photosynthesis Photosynthesis Defined Chloroplast Photosystems Process of Photosynthesis Cellular Respiration Introduction to Cellular Respiration Glycolysis Krebs Cycle Electron Transport System ... Fermentation Mitosis and Cell Reproduction Cell Nucleus Cell Cycle Meiosis and Gamete Formation Meiosis Meiosis in Humans Classical (Mendelian) Genetics Introduction to Genetics Inheritance Patterns Principles of Genetics Gene Expression (Molecular Genetics)

55. Underwater Field Guide To Ross Island & McMurdo Sound, Antarctica Photographs and information on this urchin found in Antarctica which often camouflages itself with bits of shell and debris. http://www.peterbrueggeman.com/nsf/fguide/echinodermata1.html

Field Guide ECHINODERMATA sea urchin Sterechinus neumayeri Sterechinus neumayeri is found in Antarctica and the Antarctic Peninsula, South Shetland Islands, South Orkney Islands, South Sandwich Islands, South Georgia Island, South Patagonia Island, Prince Edward Island, Marion Island, Crozet Island, and Kerguelen Island at depths from 5 to 640 meters S. neumayeri is abundant in shallow waters of McMurdo Sound at depths less than fifteen meters and plays a major role in McMurdo's benthic ecosystem. Color of the test (shell) and spines of Sterechinus neumayeri is variable, from greenish- olive to dark purplish/violet or whitish; the test is more generally greenish- olive or green-gray . It is slow growing, reaching a maximum diameter of seven centimeters at forty years of age . The bare test (shell) of the genus Sterechinus is distinguised by a large periproct within its ring of apical plates, distinctly darker lines formed by tube feet in the pore zones, and denser distribution of tubercules on the oral side than the aboral side Largely herbivorous, half of the diet of

56. Echinodermata (Spiny-skinned Animals) , Kentucky Geological Survey echinodermata (Spinyskinned animals), Fossils of Kentucky, Kentucky Geological Survey http://www.uky.edu/KGS/fossils/echinos.htm

KGS Home Fossils Invertebrate Fossils Echinodermata (Spiny-skinned animals) Echinoderms include well-known sea animals like the starfish (Asteroidea), brittle stars (Ophiuroidea), sea urchins and sand dollars (Echinoidea), sea cucumbers (Holothuroidea), and sea lilies (Crinoidea). Fossils of all these classes of echinoderms plus the extinct classes Blastoidea (no common name) and Edrioasteroidea (no common name) have been found in Kentucky. By far the most abundant are the crinoid and blastoid fossils; fossils from the other classes are relatively rare. Starfish (Asteroidea and Ophiuroidea) Sea lilies (Crinoidea) Blastoids, look like fossil hickory nuts (Blastoidea) Edrioasteroidea Edrioasteroidea (extinct) Edrioasteroides are an extinct group of echinoderms. The are usually disk shaped and lived attached to shells lying on the bottom of the sea. Although very rare, several have been found in Ordovician and Mississippian strata in Kentucky. Echinoidea (Sea Urchins, Sand Dollars) Echinoids are globe-shaped to disk-shaped echinoderms commonly covered with spines. They move about with their many tube feet on the sea bottom and eat algae. Their many spines are usually moveable. Echinoid fossils are common to rare from the Ordovician to the present. They have been found in the Ordovician through Pennsylvanian strata of Kentucky. Links to other sites Echinoderms: Introduction to the Echinodermata [technical; California Academy of Sciences]

57. Underwater Field Guide To Ross Island & McMurdo Sound, Antarctica Photographs and information on this urchin found in the icy waters of Antarctica. http://www.peterbrueggeman.com/nsf/fguide/echinodermata20.html

Field Guide ECHINODERMATA pencil urchin Ctenocidaris perrieri Ctenocidaris perrieri is found in Antarctica and the Antarctic Peninsula, Kerguelen Island, Crozet Island, and Heard Island from 6 to 602 meters depth . The test (shell) of C. perrieri has been measured at sizes up to 6.7 centimeters and is purple or purple brown in color . The primary spines of C. perrieri are typically twice as long as the horizontal diameter of the test (shell) Here's a closer look. Ctenocidaris perrieri has long, slender, coarsely thorny primary spines measured at lengths up to 8.5 centimeters and covered with a thick, spongy coat of hairs Ctenocidaris perrieri broods its embryos and juveniles in the region surrounding its mouth (the peristome) The diversity of Antarctic sea urchins with its prevalence of brooding (thirty-nine of sixty Antarctic and subantarctic species 65%) may be a process of species-level selection via extinction and speciation rates related to pelagic or protected development of their young Bulletin du Museum National d'Histoire Naturelle, Section A, Zoologie, Biologie, et Ecologie Animales 14(2):405-441, 1992;

58. Underwater Field Guide To Ross Island & McMurdo Sound, Antarctica Photographs and information on several species of heart urchin found in McMurdo Sound in Antarctica. http://www.peterbrueggeman.com/nsf/fguide/echinodermata5.html

Field Guide ECHINODERMATA heart urchin Abatus sp. Species of Abatus urchins found in McMurdo Sound area are elongatus ingens nimrodi , and shackletoni The genus Abatus is characterized by what's called a peripetalous fasciole in adult urchin tests (shells); this is a different-looking band of fine densely-packed spines circum-navigating the top of the test (see it below this red line) Heart urchins are deposit feeders, using their oral tube feet to gather up detritus . Heart urchins have a dense coat of spines which keeps sediment away from the urchin's surface, thus maintaining a water-filled surrounding space that the urchin uses for respiration while buried An Abatus sp. urchin. A. elongatus has been found in McMurdo Sound and the South Orkney Islands from 11 to 804 meters depth, is typically 4.5 centimeters in length, and rarely up to 6.5 centimeters A. elongatus has an elongate test (shell) irregularly ovoid, without a frontal notch, and has has a sinuous-looking peripetalous fasciole A. elongatus

59. Echinodermata - Ask.com Top questions and answers about echinodermata. Find 56 questions and answers about echinodermata at Ask.com Read more. http://www.ask.com/questions-about/Echinodermata

60. 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/echinodermata-1.html

Field Guide ECHINODERMATA : Asteroidea ECHINODERMATA : Asteroidea seastars Click on each organism to view more information seastar Acodontaster conspicuus seastar Acodontaster hodgsoni seastar Cuenotaster involutus seastar Diplasterias brucei seastar Lophaster gaini seastar Macroptychaster accrescens seastar, probably Macroptychaster accrescens or Leptychaster sp. seastar Notasterias armata seastar Odontaster meridionalis seastar Odontaster validus seastar Perknaster aurorae seastar Perknaster fuscus antarcticus seastar Porania antarctica seastar Porania antarctica glabra seastar Psilaster charcoti possibly the seastar Pteraster affinis aculeatus want more info?

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