21. The Ophiuroidea A brief introduction to modern and ancient brittle stars by UCMP Berkeley. http://www.ucmp.berkeley.edu/echinodermata/ophiuroidea.html

Introduction to the Ophiuroidea Ophiuroids are a large group (over 1600 species) of echinoderms that includes the brittle stars (Ophiurida) and basket stars (Euryalida). The more familiar Ophiurida, or brittle stars, usually have five arms and superficially resemble true starfish (Asteroidea). However, brittle stars have long, flexible arms (hence the other common name for ophiuroids, "snake stars" and a central, armored, disk-shaped body that is clearly demarcated from the arms. Instead of crawling on hundreds of tube feet like starfish, brittle stars move fairly rapidly by wriggling their arms. These agile arms are supported by an internal skeleton of calcium carbonate plates that superficially look like vertebrae, and that are in fact called vertebral ossicles . These are moved by a system of muscles and linked together by ball-and-socket joints. The body and arms are also protected by calcium carbonate plates, and the arms generally bear delicate spines. Basket stars (Euryalida) have a similar structure to brittle stars, although they are usually larger. However, their arms are very highly forked and branched, and even more flexible than those of brittle stars. Ophiuroids can be found in most parts of the world, from the Arctic and Antarctic to the tropics. Ophiuroids are common in many shallow-water marine habitats, and include a few species which can adapt to brackish water, which is quite unusual for echinoderms. Ophiuroids are dominant in many parts of the deep sea, where in certain regions the bottom may swarm with brittle starts. Basket stars also tend to live in deeper water. Most ophiuroids are scavengers and detritus feeders, although they also prey on small live animals such as small crustaceans and worms. Some, in particular the basket stars, filter-feed on plankton with their arms.

22. Untitled Document Phylum echinodermata. To Down load echinodermata power point presentation.Class Crinoidea, Class Asteroidea, Class Ophiuroidea, Class Echinoidea, http://www.biology.ucok.edu/AnimalBiology/Echinodermata/Echinodermata.html

Phylum Echinodermata To: Down load Echinodermata power point presentation Class: Crinoidea Class: Asteroidea Class: Ophiuroidea Class: Echinoidea Class: Holothuroidea

23. Phylum Echinodermata Phylum echinodermata Domain Eukarya Kingdom Animalia Phylum echinodermataUrchin image courtesy of Marine Biological Laboratory. http://www.sidwell.edu/us/science/vlb5/Labs/Classification_Lab/Eukarya/Animalia/

Phylum Echinodermata Domain Eukarya Kingdom Animalia Phylum Echinodermata Urchin image courtesy of Marine Biological Laboratory Phylum Echinodermata is the phylum most closely related to phylum Chordata, our own phylum. The 6,000 species that make up this phylum do not show body segmentation, and are radially symmetrical when fully grown for the most part. Almost all of the species are marine, although a few can live in brackish water. However, echinoderms are bilaterally symmetrical in the larvae stage, meaning that they are not closely related to animals of phylum Cnidaria, which never show bilateral symmetry. Here is a list of the classes in the phylum Echinodermata. Click below to see the distinguishing characteristics of these classes. Phylum Echinodermata Subphylum Blastozoa Class Eocrinoidea (Cambrian - Silurian, 30-32 genera) Class Parablastoidea (Ordovician, 3 genera) Class Rhombifera = Cystoidea in part (Ordovician - Devonian, 60 genera) Class Diploporita = Cystoidea in part (Ordovician - Devonian, 42 genera) Class Blastoidea (Silurian - Permian, 95 genera)

24. M37.htm Phylum echinodermata. Crinoid (sea lily ), from Pratt, 1923. The Echinoderms areamong the most obvious and colorful organisms of many temperate seashores. http://www.meer.org/M37.htm

MEER home Marine biology home Table of Contents Index ... Links Phylum Echinodermata Crinoid (sea lily ), from Pratt, 1923. The Echinoderms are among the most obvious and colorful organisms of many temperate seashores. Echinoderms are a very old group, dating from the early Cambrian , and are well represented in the fossil record. There are about 7,000 extant species of echinoderms , which can be divided into six classes: Crinoidea Asteroidea Ophiuroidea Echinoidea ... Concentricycloidea The Crinoidea , popularly known as Sea lilies and Feather stars, have the body oriented so that the mouth faces up. They may or may not have a stalk. There are about 625 living species of crinoids The Asteroidea (sea stars or starfish ) are among the more familiar forms to most people. The oral surface is typically ventral, they never have a stalk, and usually have multiple "arms" surrounding a central disk. there are about 1,500 living species of Asteroids Asteroid (sea star) Ophiuroid (brittle star), from Halstead (1965) The class Ophiuroidea includes about 2,000 living species of animals that are usually called

25. Phylum Echinodermata Phylum echinodermata. Overview. Phylum echinodermata. Class Echinoidea, 011_211.jpg(60990 bytes), Anmaq012.jpg (49212 bytes), ng 1980 urchin 00.jpg (60320 bytes). http://cas.bellarmine.edu/tietjen/images/phylum_echinodermata.htm

Phylum Echinodermata Overview Phylum Echinodermata Class Echinoidea Class Asteroidea Class Ophuroidea Class Crinoidea (another is here and here Class Holothuroidea

26. BIS: Echinodermata > Introduction Classification. Introduction. Members of the phylum echinodermataare exclusively marine and most of them are bottom dwellers. The http://ip30.eti.uva.nl/bis/echinodermata.php

Introduction General morphology Morphology: Crinoidea Morphology: Asteroidea Morphology: Ophiuroidea Morphology: Echinoidea Morphology: Holothurioidea Reproduction Classification Introduction Members of the phylum Echinodermata are exclusively marine and most of them are bottom dwellers. The most striking characteristic of most species of this group is the pentamerous radial symmetry. This symmetry, however, has been secondarily derived from a bilateral ancestral form and is lost in some recent species. Another characteristic, unique to the echinoderms, is the water-vascular, or ambulacral, system. The phylum is divided into five easily recognized classes: 1. Crinoidea, the stalked sea-lilies and feather-stars (Greek: 'lily-like'). This class is most primitive and comprises most sessile species as well as a number of free-swimming forms without a stalk. 2. Asteroidea, the starfishes (or sea-stars) and cushion-stars (Greek: 'star-like'). 3. Ophiuroidea, the brittle-stars and basket-stars (Greek: 'snake-like'). 4. Echinoidea, the sea-urchins, sand-dollars and heart-urchins (Greek: 'spiny').

27. What Are The Echinodermata? The Diversity of Living Organisms Themes of Adaptationand Evolution. What are the echinodermata? http://science.kennesaw.edu/biophys/biodiversity/animalia/echinoderm.html

The Diversity of Living Organisms: Themes of Adaptation and Evolution What are the Echinodermata? Background Sources Background General Echinodermata includes the common sea stars, sea urchins, sand dollars, sea cucumbers and many other unique and interesting marine organisms. The term echinoderm comes from two Greek words: "echino" meaning spiny and "derm" meaning skin. A brush with either a sea urchin or a sea star in a marine aquarium's touch tank will quickly confirm the validity of the phylum's name. Body Form Echinoderms are coelomate deuterostomes. Although the adults are typically radially symmetric, the larval forms exhibit bilateral symmetry. Nearly all of the members of this phylum possess some type of an internal calcareous skeleton. Almost all echinoderms possess a unique water-vascular system. This system consists of a series of fluid-filled canals extending throughout the body and often terminating in a series of bulb-like structures known as "tube feet". Muscular contractions force water into and out of the tube feet, allowing them to expand and contract individually. Each "foot" has a muscular, suckerlike ampulla on the end that attaches to available substrates. Many of the sea stars use this unique hydraulic system to grip clams and snails, breaking open the shells for a meal. The nervous system associated with the water-vascular system is also unique. Rather than having a centrally-oriented system with a controlling "brain", there are a series of nerve networks extending into each of the various body regions. The nerve networks are connected to a central ring-like series of nerve ganglia. This unique "radial" nervous system allows the echinoderms unusual flexibility in behavior, as any portion of the body can serve as the "head" as it experiences its environment.

28. Echinodermata Page Back, Unit Home, Page Next, Page Up, Page Down, echinodermata, Cladogram,Glossary. echinodermata. Cambrian to Recent. Phylum echinodermata. Subphylum Blastozoa. http://www.palaeos.com/Invertebrates/Echinoderms/echinodermata.htm

Palæos: Echinodermata INVERTEBRATES Echinoderm Home Home Palaeont- ology Evolution ... Megayear Digest Page Back Unit Home Page Next Page Up Page Down Echinodermata Cladogram Glossary Echinodermata Cambrian to Recent 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. The most distinctive thing about echinoderm appearance is their pentameral - that is, a five fold - radial symmetry. In other words, their body is structured on a five-fold plan, with rays or arms in fives or multiples of five, as shown for example with the familiar starfish with its five arms.

29. BiologyBrowser: Organism Resources And Links Results 1 10 of at least 43 Animal Diversity Web - echinodermataUniversity of Michigan Museum of Zoology; CAS Echinoderm Webpage http://www.biologybrowser.org/bb/Organism/Invertebrata/Echinodermata/index.shtml

Home About BiologyBrowser What's New Newsletter ... Promote Your Site Search BiologyBrowser Organism (ex. fungi) Subject (ex. biodiversity) Geography (region) All Counts of New and Changed Names Reported in Zoological Record Indicates trends in assigning names to new animals by taxonomists. Search the Index to Organism Names The Index to Organism Names project uses name data from the resources of BIOSIS and other collaborating organizations. Conferences Nomenclatural Glossary for Zoology An alphabetical list of specialist terms. For basic answers to who's who in the Animal Kingdom. Main Category: Organism Home Organism Invertebrata Echinodermata Sub-Categories No subcategories found for this category Related Categories Site Matches Any Term All Terms Entire collection This Category Only Within results Results 1 - 10 of at least 43 Animal Diversity Web - Echinodermata University of Michigan Museum of Zoology CAS Echinoderm Webpage taxonomy, links, research and holdings, California Academy of Sciences

30. Phylum Echinodermata Phylum echinodermata. Introduction. the name echinodermata.html. Clickhere to find out more about each of the five classes of echinodermata. http://www.personal.psu.edu/asi103/

31. 5 Classes Of Phylum Echinodermata 5 Classes of Phylum echinodermata. Asteroidea. Copyright free. http//204.154.117.95/AnimalBiology/echinodermata/Asteroidea/Asteroidea.html. http://www.personal.psu.edu/users/a/s/asi103/5_classes_of_phylum_echinodermata.h

32. Echinodermata Lesson echinodermata Lesson. Spiny skinned animals with sac like digestivesystems. Echinoderms have been compared to living, moving castles. http://www.kent.k12.wa.us/staff/rlynch/sci_class/chap14/echinodermata.html

Echinodermata Lesson Spiny skinned animals with sac like digestive systems. Echinoderms have been compared to living, moving castles. Castles are made of interlocking blocks, with a single main entrance and numerous slit windows for air and for defense. Echinoderm skeletons are made up of interlocking calcium carbonate plates and spines. This skeleton is enclosed by the epidermis and is thus an endoskeleton. In some, such as sea urchins, the plates fit together tightly. In others, such as starfish, the plates are more loosely bound, and in sea cucumbers the plates are usually microscopic. Radial symmetry - frequently in units of five Body enclosed in plates or leathery skin Water vascular system - tube feet Live in water Examples: Starfish, sea cucumber, sea urchin, sand dollar

33. Echinodermata Translate this page Stamm echinodermata ( Stachelhäuter ). Allgemein Lebensraum -marin.Charakteristisch Pentamerie (fünfstrahlige Radiärsymmetrie http://www.zoologie-online.de/Systematik/Metazoa/Echinodermata/echinodermata.htm

CD-ROM Zoologie jetzt Version 5.0 Die Vollversion zum bestellen. Alle Webseiten + hunderte von Bildern + Animationen +Audioausgabe ++ praktischer Teil! Mittlerweile ein Klassiker in der Zoologie. Präparations- anleitungen zu fast allen gängingen Praktikumstagen! 650MB an Texten,Bildern und Filmen hier bestellen Zoologie- Klausurfragen CD-ROM 350 Klausurfragen im Multiple-Choice Quiz-System! optimale Klausurvorbereitung und Semester- begleitung hier bestellen Lernposterset Zoologie gesammeltes theoretisches Anatomiewissen übersichtlich, didaktisch und optisch an- sprechend auf 2 Postern + ein Extraposter mit den Parasiten im Überblick! Hier bestellen Lernposterset Botanik drei Poster mit zahlreichen histologischen Fotografien, Kennzeichen der wichtigsten Blütenpflanzenfamili en und einem völlig neuartigem systematischen Üblerblick üb die Gefäßpflanzen Hier bestellen Systematik theoretische Beschreibungen der einzelnen Tiergruppen Info Kontakt: sascha@stormcrow-s oftware.de

34. BIOSIS | Resource Guide | Echinodermata echinodermata. Links to miscellaneous resources of use in the study ofechinoderms (starfish, sea urchins, sea cucumbers and sea lilies). http://www.biosis.org.uk/zrdocs/zoolinfo/grp_ech.htm

Pull Down for Destinations BIOSIS Previews Zoological Record MethodsFinder Index to Organism Names Internet Resource Guide for Zoology User Support Search Sitemap Index Help with this Site Resource Guide Introduction About the Resource Guide Awards Latest Additions ... Search Echinodermata Links to miscellaneous resources of use in the study of echinoderms (starfish, sea urchins, sea cucumbers and sea lilies). Animal Diversity Web University of Michigan Museum of Zoology CAS Echinoderm Webpage taxonomy, links, research and holdings, California Academy of Sciences Checklist of the Metazoa: part 5, Echinodermata classification scheme Classification of the Extant Echinodermata California Academy of Sciences Crinoidea: sea lilies and feather stars Tree of Life Crinoids UCMP Berkeley exhibit Crown-of-thorns starfish Australian Institute of Marine Science (AIMS) reef monitoring project research information Echinoderm Links extensive listing from California Academy of Science Echinoderm Newsletter produced annually for 30 years to provide a service to those scientists around the world who study echinoderms, includes research interests, announcements, contacts and many other topics of interest to the echinoderm community

35. Phylum Echinodermata of. Phylum echinodermata. by Chris Logan. General Information. These organismsmight not look alike but they all belong to the Phylum echinodermata. http://fig.cox.miami.edu/~161hon2/temp1.html

with Phierce, Phunky, Phacts of Phylum Echinodermata by Chris Logan General Information If you have ever walked along the beach you have probably come across a sanddollar or two. An avid beachgoer may search for sea urchins, brittle stars, or even sea cucumbers. An underwater diver may have the luck of finding a sea lily. These organisms might not look alike but they all belong to the Phylum Echinodermata. Echinodermata is divided into two subphylums: Subphylum Pelmatozoa exclusively includes Class Crinoidea (sea lilies and feather stars). Subphylum Eleutherozoa includes Class Asteroidea (true star fish), Ophiuroida (brittle stars), Concentriclycoidea (sea daisies), Echinoidea (sea urchins and sand dollars), and finally Holothuroidea (sea cucumbers). Generally, echinoderms are pentaradial. In other words they exhibit five-fold symmetry. They have a diffuse nervous system (no brain!) which lets them receive stimuli equally from all directions. Most echinoderms are mobile unlike many of their pentameral peers. An internal water vascular system facilitates movement. The vast majority of echinoderms are bottom dwellers. Observe the pentameral symmetry in Brissidae , a member of Class Echinoidea.

36. Phylum Echinodermata Next Last Index Home Text. Slide 1 of 16. http://faculty.evansville.edu/de3/b10802/PPoint/Echinodermata/sld001.htm

37. Echinodermata echinodermata Subphylum Echinozoa Class Echinoidea (regular) Phymosoma ( ). Cidarus( ). (irregular) Eupatagus( ). Encope ( ). Epiaster( ). Subphylum Blastozoa http://www.umpi.maine.edu/~mccartnk/paleol11.htm

Echinodermata Subphylum Echinozoa Class Echinoidea (regular) Phymosoma Cidarus (irregular) Eupatagus Encope Epiaster Subphylum Blastozoa Class Blastoidea Pentremites Return to Paleontology Syllabus Return to Kevin McCartney's homepage

38. Echinoderms: Star Fish, Sea Urchins, Sea Cucumbers Cucumbers. The CAS Echinoderm Web Page; Common Intertidal Animals Echinoderms;echinodermata Biosis and the zoological society of London; http://www.floridasmart.com/subjects/ocean/animals_ocean_echin.htm

Your Florida Web Guide Advertise Sponsor Be an Editor Attractions ... Local You are here: Home Subjects Oceans Sea Life Echinoderms Sponsor this page This space available. Sea Life Index Echinoderms Star Fish Sea Urchins Sea Cucumbers Related Directories: Ocean Studies Animal Studies Florida Fishing Natural Florida ... FL Aquariums This Page Edited By Debbie Lennon Sea Turtle Volunteer Do you know of a Marine Life site that we missed? Click here to add a link Echinoderms: Star Fish, Sea Urchins, Sea Cucumbers The CAS Echinoderm Web Page Common Intertidal Animals- Echinoderms Echinodermata Biosis and the zoological society of London Echinodermata-Body Structure Echinodermata- Introduction Echinoderm Anatomy Echinoderms ... Other Echinoderms Extinct forms Nearctica-Natural History-Echinodermata Sea Stars Sea Stars Sea Urchin Sea Urchin Harvesters Association The Urchin Web Summary Page Maine Urchin Harvesters Association Preserving and promoting the green sea urchin fishery of Maine.

39. --{ BIOMANIA.COM.BR }-- Translate this page O filo echinodermata é constituído por cerca de 7.000 espécies distribuídas emseis classes Crinoidea, Asteroidea, Ophiuroidea, Echinoidea, Holothuroidea http://www.biomania.com.br/zoologia1/echinodermata.php

Cnidaria Platyhelminthes Aschelminthes Annelida ... Chordata Introdução As classes de Echinodermata divergiram evolutivamente ainda no Pré-Cambriano (Ubaghs, 1967), sendo que as atuais surgiram no início do Paleozóico, há cerca de 550-450 milhões de anos (Smith, 1992). O registro fóssil do grupo conta atualmente com cerca de 16 classes e mais de 13.000 espécies extintas (Hendler et al., 1995). Todos os representantes do filo são de vida livre, sendo raras as espécies comensais. Em geral, os sexos são separados, sem dimorfismo sexual externo, com exceção dos Concentricycloidea, que apresentam, inclusive, órgão copulatório. Algumas espécies passam por um estádio larval planctônico, enquanto outras são vivíparas. Apesar de raro entre os Echinodermata, o hermafroditismo tem sido relatado em algumas espécies. O alto poder de regeneração dos integrantes deste filo confere a algumas espécies a capacidade de se reproduzir assexuadamente por fissão, um processo de divisão do corpo que resulta em novos indivíduos completos e funcionais. Embora a grande maioria das espécies seja marinha, algumas toleram a água salobra. Podem ser encontrados em todos os oceanos, latitudes e profundidades, da zona entremarés às regiões abissais, sendo mais abundantes na região tropical do que nas águas polares.

40. BDT [echinodermata Recentes E Fósseis Do Brasil] Translate this page INVERTEBRADOS MARINHOS REGISTRADOS NO LITORAL BRASILEIRO. echinodermata RECENTESE FÓSSEIS DO BRASIL. Luiz Roberto Tommasi Instituto Oceanográfico da USP. http://www.bdt.fat.org.br/zoologia/echinodermata/

defaultStatus="Base de Dados Tropical"; INVERTEBRADOS MARINHOS REGISTRADOS NO LITORAL BRASILEIRO ECHINODERMATA RECENTES E FÓSSEIS DO BRASIL Luiz Roberto Tommasi Echinaster brasiliensis Echinodermata recentes 6. Echinodermata na INTERNET 7. The Echinoderm Newsletter 10. CLASSE ECHINOIDEA Leske, 1778 11. CLASSE HOLOTHURIOIDEA de Blainville, 1834 ... 14. BIBLIOGRAFIA email: webmaster@fat.org.br

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