ADW: Animalia: INFORMATION

<!DOCTYPE html> <html xmlns:og="http://ogp.me/ns#" lang="en" xml:lang="en"> <head> <title>ADW: Animalia: INFORMATION</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="canonical" href="https://animaldiversity.org/accounts/Animalia/" /> <script type="text/javascript" src="//code.jquery.com/jquery-3.6.0.min.js"></script> <script type="text/javascript" src="//code.jquery.com/jquery-migrate-3.3.2.min.js"></script> <script type="text/javascript" src="/static/js/compat.js"></script> <link rel="shortcut icon" href="https://animaldiversity.org/favicon.ico" /> <link href="//fonts.googleapis.com/css?family=Gentium+Book+Basic:400,400italic,700,700italic" rel="stylesheet" type="text/css" /> <link href="//fonts.googleapis.com/css?family=PT+Sans:400,700,400italic,700italic" rel="stylesheet" type="text/css" /> <link rel="stylesheet" type="text/css" href="/static/bootstrap/css/bootstrap.css" /> <link rel="stylesheet" href="/static/css/pica.styles.css" /> <link rel="stylesheet" href="/static/css/pica.print.css" media="print" />  <link rel="stylesheet" type="text/css" href="/static/colorbox/colorbox.css" /> <meta property="og:url" content="https://animaldiversity.org/accounts/Animalia/" /> <meta content="Animalia (animals)" property="og:title" /> <meta content="website" property="og:type" /> <meta content="Animal Diversity Web" property="og:site_name" /> <meta content="https://animaldiversity.org/collections/contributors/Grzimek_fish/Myxiniformes/eptatretus_stouti/medium.jpg" property="og:image" /> <meta name="twitter:card" content="summary" /> <meta name="twitter:site" content="@AnimalDiversity" /> <meta name="twitter:title" content="Animalia (animals)" /> <meta name="twitter:description" content="Read about Animalia (animals) on the Animal Diversity Web." /> <meta name="twitter:image:src" content="https://animaldiversity.org/collections/contributors/Grzimek_fish/Myxiniformes/eptatretus_stouti/medium.jpg" /> <meta name="twitter:image:height" content="472" /> <meta name="twitter:image:width" content="640" /> <meta name="twitter:url" content="https://animaldiversity.org/accounts/Animalia/" /> <script type="text/javascript" src="/static/js/Hyphenator.js"></script> <link rel="stylesheet" href="/static/social-likes/social-likes_birman.css" /> <style> .social-likes { margin: 0; } .social-likes__widget { margin: 0; } </style>   </head> <body> <div id="outerwrap"> <div id="header" aria-role="header"> <h1> <a id="homelink" href="/">Animal Diversity Web</a> </h1> <div class="umlinks"> <div class="relative"> <a href="https://lsa.umich.edu/ummz/" id="ummzlink">University of Michigan Museum of Zoology</a> <a href="https://www.umich.edu/" id="umlink">University of Michigan</a> </div> </div> </div> <div id="wrap" class="gradient"> <div class="container-fluid"> <div class="row-fluid"> <div class="span2 sidebar left"> <ul class="nav nav-tabs nav-stacked" id="sitemap"> <li> <a href="/">Home</a> </li> <li> <a href="/about/">About Us</a> </li> <li> <a href="/animal_names/">About Animal Names</a> </li> <li> <a href="/teach/">Educational Resources</a> </li> <li> <a href="/collections/">Special Collections</a> </li> <li> <a href="/glossary/">Glossary</a> </li> <li> <a href="/accounts/Animalia/">Browse Animalia</a> </li> </ul> <h2 class="offscreen">More Information</h2> <div class="well"> <h3>Additional Information</h3> <ul class="unstyled"> <li> <a href="http://eol.org/search/?q=Animalia&search=Go">Encyclopedia of Life</a> </li> </ul> </div> </div> <div class="span7_5 blahblahblah main" aria-role="main"> <h2 class="rank-kingdom">Animalia<span class="vernacular-name">animals</span></h2> <div class="social-likes" data-counters="no"> <div class="facebook" title="Share link on Facebook">Facebook</div> <div class="twitter" title="Share link on Twitter">Twitter</div> </div> <div class="snapshots" aria-hidden="true"> <ul> <li> <a href="/accounts/Animalia/pictures/collections/contributors/Grzimek_fish/Myxiniformes/eptatretus_stouti/"> <img alt=" " src="/collections/contributors/Grzimek_fish/Myxiniformes/eptatretus_stouti/button.jpg" border="0" /> </a> </li> <li> <a href="/accounts/Animalia/pictures/collections/contributors/phil_myers/Erebidae/Tetanolita6026/"> <img alt=" " src="/collections/contributors/phil_myers/Erebidae/Tetanolita6026/button.jpg" border="0" /> </a> </li> <li> <a href="/accounts/Animalia/pictures/collections/contributors/Grzimek_insects/Isoptera/Pterotermes_occidentis/"> <img alt=" " src="/collections/contributors/Grzimek_insects/Isoptera/Pterotermes_occidentis/button.jpg" border="0" /> </a> </li> <li> <a href="/accounts/Animalia/pictures/collections/contributors/luis_tejo/pheasant2/"> <img alt=" " src="/collections/contributors/luis_tejo/pheasant2/button.jpg" border="0" /> </a> </li> <li> <a href="/accounts/Animalia/pictures/collections/contributors/Myers_Liza/zenaidadove/"> <img alt=" " src="/collections/contributors/Myers_Liza/zenaidadove/button.jpg" border="0" /> </a> </li> </ul> </div> <div class="byline">By Phil Myers</div> <div class="inner-wrap"> <section class="hyphenate"> <p>All animals are members of the Kingdom Animalia, also called Metazoa. This Kingdom does not contain prokaryotes (Kingdom Monera, includes bacteria, blue-green algae) or protists (Kingdom Protista, includes unicellular eukaryotic organisms). All members of Animalia are multicellular, and all are heterotrophs (that is, they rely directly or indirectly on other organisms for their nourishment). Most ingest food and digest it in an internal cavity.</p> <p>Animal cells lack the rigid cell walls that characterize plant cells. The bodies of most animals (all except <a class="taxon-link" href="/accounts/Porifera/">sponges</a>) are made up of cells organized into tissues, each tissue specialized to some degree to perform specific functions. In most, tissues are organized into even more specialized organs. Most animals are capable of complex and relatively rapid movement compared to plants and other organisms. Most reproduce sexually, by means of differentiated eggs and sperm. Most animals are diploid, meaning that the cells of adults contain two copies of the genetic material. The development of most animals is characterized by distinctive stages, including a zygote, formed by the product of the first few division of cells following fertilization; a blastula, which is a hollow ball of cells formed by the developing zygote; and a gastrula, which is formed when the blastula folds in on itself to form a double-walled structure with an opening to the outside, the blastopore.</p> <p>It is estimated that around 9 or 10 million species of animals inhabit the earth; the exact number is not known and all estimates are rough. Animals range in size from no more than a few cells to organisms weighing many tons, such as <a class="taxon-link" href="/accounts/Balaenoptera_musculus/">blue whales</a> and <a class="taxon-link" href="/accounts/Architeuthis_dux/">giant squid</a>. By far most species of animals are <a class="taxon-link" href="/accounts/Insecta/">insects</a>, with groups such as <a class="taxon-link" href="/accounts/Mollusca/">mollusks</a>, <a class="taxon-link" href="/accounts/Crustacea/">crustaceans</a>, and <a class="taxon-link" href="/accounts/Nematoda/">nematodes</a> also being especially diverse. By this measure our own group, the <a class="taxon-link" href="/accounts/Vertebrata/">vertebrates</a>, is relatively inconsequential from a diversity perspective.</p> <p>Research continues on the evolutionary relationships of the major groups of animals. For the sake of convenience, the Animal Diversity Web follows the system outlined in Hickman and Roberts (1994). For some groups we incorporate the results of current research in our classification and discussion.</p> </section> <section class="hyphenate"> <h3 id="contributors">Contributors</h3> <p>Phil Myers (author), Museum of Zoology, University of Michigan-Ann Arbor. </p> </section> </div> </div> <div class="span2_5 right sidebar"> <div class="well" id="pocket-guide-link"> <a href="https://itunes.apple.com/us/app/adw-pocket-guide/id916179421?mt=8" target="_blank"><i class="icon-download icon-white" style="vertical-align: bottom"></i> ADW Pocket Guides on the iOS App Store! </a> <p>The Animal Diversity Web team is excited to announce ADW Pocket Guides!</p> <p> <a href="/news/5009059054038197651/">Read more...</a> </p> </div> <h2 class="offscreen">Search</h2> <div id="site-search"> <form action="/search" method="GET"> <label for="q" class="offscreen">Enter search text</label> <input value="" id="q" name="q" class="span12" size="15" type="text" placeholder="Search ADW" /> <button class="btn"> <i class="icon-zoom-in"></i> <span class="offscreen">Search</span> </button> <p style="max-height: 35px"> <label for="feature-list" class="offscreen">Search in feature</label> <select size="1" name="feature" class="feature-list input-medium" id="feature-list"> <option value="INFORMATION">Taxon Information</option> <option value="COLLECTIONS">Contributor Galleries</option> <option value="TOPICS">Topics</option> <option value="CLASSIFICATION">Classification</option> </select> </p> </form> <ul class="unstyled"> <li> <a href="https://animaldiversity.ummz.umich.edu/quaardvark/">Explore Data @ Quaardvark</a> </li> <li> <a href="/search_guide/">Search Guide</a> </li> </ul> </div> <h2 class="offscreen">Navigation Links</h2> <dl class="tabbed features"> <dd class="feature-information active"> <a name="feature-information" href="/accounts/Animalia/" class="active" id="feature-information"> Information </a> </dd> <dd class="feature-pictures"> <a name="feature-pictures" href="/accounts/Animalia/pictures/" id="feature-pictures"> Pictures </a> </dd> <dd class="feature-specimens"> <a name="feature-specimens" href="/accounts/Animalia/specimens/" id="feature-specimens"> Specimens </a> </dd> <dd class="feature-sounds"> <a name="feature-sounds" href="/accounts/Animalia/sounds/" id="feature-sounds"> Sounds </a> </dd> <dd class="feature-maps"> <a name="feature-maps" href="/accounts/Animalia/maps/" id="feature-maps"> Maps </a> </dd> <dd class="feature-classification"> <a name="feature-classification" href="/accounts/Animalia/classification/#Animalia" id="feature-classification"> Classification </a> </dd> </dl> <div class="classification well"> <h3>Classification</h3> <ul class="unstyled"> <li class="active"> <span class="rank">Kingdom</span> <a href="/accounts/Animalia/" class="taxon-name rank-kingdom">Animalia</a> <span class="vernacular-name">animals</span> <div class="features"> <a href="/accounts/Animalia/" class="feature feature-information" rel="tooltip" data-original-title="Animalia: information (1)" data-delay="250" data-total="4749">Animalia: information (1)</a> <a href="/accounts/Animalia/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Animalia: pictures (22861)" data-delay="250">Animalia: pictures (22861)</a> <a href="/accounts/Animalia/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Animalia: specimens (7109)" data-delay="250">Animalia: specimens (7109)</a> <a href="/accounts/Animalia/sounds/" class="feature feature-sounds" rel="tooltip" data-original-title="Animalia: sounds (722)" data-delay="250">Animalia: sounds (722)</a> <a href="/accounts/Animalia/maps/" class="feature feature-maps" rel="tooltip" data-original-title="Animalia: maps (42)" data-delay="250">Animalia: maps (42)</a> </div> </li> </ul> </div> <div class="related navlist well"> <h3>Related Taxa</h3> <ul class="descendants classification unstyled"> <li> <span class="rank">Unspecified</span> <a href="/accounts/Annelida/" class="taxon-name rank-unspecified">Annelida</a> <span class="vernacular-name">segmented worms</span> <div class="features"> <a href="/accounts/Annelida/" class="feature feature-information" rel="tooltip" data-original-title="Annelida: information (1)" data-delay="250" data-total="8">Annelida: information (1)</a> <a href="/accounts/Annelida/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Annelida: pictures (50)" data-delay="250">Annelida: pictures (50)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Class</span> <a href="/accounts/Aplacophora/" class="taxon-name rank-class">Aplacophora</a> <span class="vernacular-name"></span> <div class="features"> <a href="/accounts/Aplacophora/" class="feature feature-information" rel="tooltip" data-original-title="Aplacophora: information (1)" data-delay="250" data-total="1">Aplacophora: information (1)</a> <a href="/accounts/Aplacophora/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Aplacophora: pictures (5)" data-delay="250">Aplacophora: pictures (5)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Arthropoda/" class="taxon-name rank-unspecified">Arthropoda</a> <span class="vernacular-name">arthropods</span> <div class="features"> <a href="/accounts/Arthropoda/" class="feature feature-information" rel="tooltip" data-original-title="Arthropoda: information (1)" data-delay="250" data-total="454">Arthropoda: information (1)</a> <a href="/accounts/Arthropoda/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Arthropoda: pictures (6910)" data-delay="250">Arthropoda: pictures (6910)</a> <a href="/accounts/Arthropoda/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Arthropoda: specimens (116)" data-delay="250">Arthropoda: specimens (116)</a> <a href="/accounts/Arthropoda/sounds/" class="feature feature-sounds" rel="tooltip" data-original-title="Arthropoda: sounds (13)" data-delay="250">Arthropoda: sounds (13)</a> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Class</span> <a href="/accounts/Bivalvia/" class="taxon-name rank-class">Bivalvia</a> <span class="vernacular-name"></span> <div class="features"> <a href="/accounts/Bivalvia/" class="feature feature-information" rel="tooltip" data-original-title="Bivalvia: information (1)" data-delay="250" data-total="82">Bivalvia: information (1)</a> <a href="/accounts/Bivalvia/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Bivalvia: pictures (68)" data-delay="250">Bivalvia: pictures (68)</a> <a href="/accounts/Bivalvia/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Bivalvia: specimens (58)" data-delay="250">Bivalvia: specimens (58)</a> <span class="feature-off feature-sounds"></span> <a href="/accounts/Bivalvia/maps/" class="feature feature-maps" rel="tooltip" data-original-title="Bivalvia: maps (42)" data-delay="250">Bivalvia: maps (42)</a> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Brachiopoda/" class="taxon-name rank-unspecified">Brachiopoda</a> <span class="vernacular-name">lamp-shells</span> <div class="features"> <a href="/accounts/Brachiopoda/" class="feature feature-information" rel="tooltip" data-original-title="Brachiopoda: information (1)" data-delay="250" data-total="1">Brachiopoda: information (1)</a> <a href="/accounts/Brachiopoda/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Brachiopoda: pictures (5)" data-delay="250">Brachiopoda: pictures (5)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Phylum</span> <a href="/accounts/Bryozoa/" class="taxon-name rank-phylum">Bryozoa</a> <span class="vernacular-name">moss animals</span> <div class="features"> <a href="/accounts/Bryozoa/" class="feature feature-information" rel="tooltip" data-original-title="Bryozoa: information (1)" data-delay="250" data-total="1">Bryozoa: information (1)</a> <a href="/accounts/Bryozoa/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Bryozoa: pictures (15)" data-delay="250">Bryozoa: pictures (15)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Class</span> <a href="/accounts/Cephalopoda/" class="taxon-name rank-class">Cephalopoda</a> <span class="vernacular-name"></span> <div class="features"> <a href="/accounts/Cephalopoda/" class="feature feature-information" rel="tooltip" data-original-title="Cephalopoda: information (1)" data-delay="250" data-total="33">Cephalopoda: information (1)</a> <a href="/accounts/Cephalopoda/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Cephalopoda: pictures (26)" data-delay="250">Cephalopoda: pictures (26)</a> <a href="/accounts/Cephalopoda/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Cephalopoda: specimens (2)" data-delay="250">Cephalopoda: specimens (2)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Chaetognatha/" class="taxon-name rank-unspecified">Chaetognatha</a> <span class="vernacular-name">arrow worms</span> <div class="features"> <a href="/accounts/Chaetognatha/" class="feature feature-information" rel="tooltip" data-original-title="Chaetognatha: information (1)" data-delay="250" data-total="1">Chaetognatha: information (1)</a> <a href="/accounts/Chaetognatha/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Chaetognatha: pictures (7)" data-delay="250">Chaetognatha: pictures (7)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Phylum</span> <a href="/accounts/Chordata/" class="taxon-name rank-phylum">Chordata</a> <span class="vernacular-name">chordates</span> <div class="features"> <a href="/accounts/Chordata/" class="feature feature-information" rel="tooltip" data-original-title="Chordata: information (1)" data-delay="250" data-total="3902">Chordata: information (1)</a> <a href="/accounts/Chordata/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Chordata: pictures (15213)" data-delay="250">Chordata: pictures (15213)</a> <a href="/accounts/Chordata/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Chordata: specimens (6829)" data-delay="250">Chordata: specimens (6829)</a> <a href="/accounts/Chordata/sounds/" class="feature feature-sounds" rel="tooltip" data-original-title="Chordata: sounds (709)" data-delay="250">Chordata: sounds (709)</a> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Phylum</span> <a href="/accounts/Cnidaria/" class="taxon-name rank-phylum">Cnidaria</a> <span class="vernacular-name">corals, sea anemones, jellyfish, and relatives</span> <div class="features"> <a href="/accounts/Cnidaria/" class="feature feature-information" rel="tooltip" data-original-title="Cnidaria: information (1)" data-delay="250" data-total="53">Cnidaria: information (1)</a> <a href="/accounts/Cnidaria/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Cnidaria: pictures (168)" data-delay="250">Cnidaria: pictures (168)</a> <a href="/accounts/Cnidaria/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Cnidaria: specimens (7)" data-delay="250">Cnidaria: specimens (7)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Ctenophora/" class="taxon-name rank-unspecified">Ctenophora</a> <span class="vernacular-name">comb jellies</span> <div class="features"> <a href="/accounts/Ctenophora/" class="feature feature-information" rel="tooltip" data-original-title="Ctenophora: information (1)" data-delay="250" data-total="1">Ctenophora: information (1)</a> <span class="feature-off feature-pictures"></span> <a href="/accounts/Ctenophora/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Ctenophora: specimens (1)" data-delay="250">Ctenophora: specimens (1)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Cycliophora/" class="taxon-name rank-unspecified">Cycliophora</a> <span class="vernacular-name">lobster symbionts</span> <div class="features"> <a href="/accounts/Cycliophora/" class="feature feature-information" rel="tooltip" data-original-title="Cycliophora: information (1)" data-delay="250" data-total="2">Cycliophora: information (1)</a> <a href="/accounts/Cycliophora/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Cycliophora: pictures (1)" data-delay="250">Cycliophora: pictures (1)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Echinodermata/" class="taxon-name rank-unspecified">Echinodermata</a> <span class="vernacular-name">sea stars, sea urchins, sea cucumbers, and relatives</span> <div class="features"> <a href="/accounts/Echinodermata/" class="feature feature-information" rel="tooltip" data-original-title="Echinodermata: information (1)" data-delay="250" data-total="42">Echinodermata: information (1)</a> <a href="/accounts/Echinodermata/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Echinodermata: pictures (85)" data-delay="250">Echinodermata: pictures (85)</a> <a href="/accounts/Echinodermata/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Echinodermata: specimens (16)" data-delay="250">Echinodermata: specimens (16)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Entoprocta/" class="taxon-name rank-unspecified">Entoprocta</a> <span class="vernacular-name">hairy back worms</span> <div class="features"> <a href="/accounts/Entoprocta/" class="feature feature-information" rel="tooltip" data-original-title="Entoprocta: information (1)" data-delay="250" data-total="1">Entoprocta: information (1)</a> <a href="/accounts/Entoprocta/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Entoprocta: pictures (4)" data-delay="250">Entoprocta: pictures (4)</a> <a href="/accounts/Entoprocta/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Entoprocta: specimens (2)" data-delay="250">Entoprocta: specimens (2)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Class</span> <a href="/accounts/Gastropoda/" class="taxon-name rank-class">Gastropoda</a> <span class="vernacular-name"></span> <div class="features"> <a href="/accounts/Gastropoda/" class="feature feature-information" rel="tooltip" data-original-title="Gastropoda: information (1)" data-delay="250" data-total="68">Gastropoda: information (1)</a> <a href="/accounts/Gastropoda/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Gastropoda: pictures (175)" data-delay="250">Gastropoda: pictures (175)</a> <a href="/accounts/Gastropoda/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Gastropoda: specimens (56)" data-delay="250">Gastropoda: specimens (56)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Gastrotricha/" class="taxon-name rank-unspecified">Gastrotricha</a> <span class="vernacular-name">hairy back worms</span> <div class="features"> <a href="/accounts/Gastrotricha/" class="feature feature-information" rel="tooltip" data-original-title="Gastrotricha: information (1)" data-delay="250" data-total="1">Gastrotricha: information (1)</a> <span class="feature-off feature-pictures"></span> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Phylum</span> <a href="/accounts/Kinorhyncha/" class="taxon-name rank-phylum">Kinorhyncha</a> <span class="vernacular-name">mud dragons</span> <div class="features"> <a href="/accounts/Kinorhyncha/" class="feature feature-information" rel="tooltip" data-original-title="Kinorhyncha: information (1)" data-delay="250" data-total="1">Kinorhyncha: information (1)</a> <a href="/accounts/Kinorhyncha/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Kinorhyncha: pictures (2)" data-delay="250">Kinorhyncha: pictures (2)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Class</span> <a href="/accounts/Monoplacophora/" class="taxon-name rank-class">Monoplacophora</a> <span class="vernacular-name"></span> <div class="features"> <a href="/accounts/Monoplacophora/" class="feature feature-information" rel="tooltip" data-original-title="Monoplacophora: information (1)" data-delay="250" data-total="1">Monoplacophora: information (1)</a> <a href="/accounts/Monoplacophora/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Monoplacophora: pictures (2)" data-delay="250">Monoplacophora: pictures (2)</a> <a href="/accounts/Monoplacophora/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Monoplacophora: specimens (3)" data-delay="250">Monoplacophora: specimens (3)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Phylum</span> <a href="/accounts/Nematoda/" class="taxon-name rank-phylum">Nematoda</a> <span class="vernacular-name">roundworms</span> <div class="features"> <a href="/accounts/Nematoda/" class="feature feature-information" rel="tooltip" data-original-title="Nematoda: information (1)" data-delay="250" data-total="31">Nematoda: information (1)</a> <a href="/accounts/Nematoda/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Nematoda: pictures (7)" data-delay="250">Nematoda: pictures (7)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Nematomorpha/" class="taxon-name rank-unspecified">Nematomorpha</a> <span class="vernacular-name">horsehair worms</span> <div class="features"> <a href="/accounts/Nematomorpha/" class="feature feature-information" rel="tooltip" data-original-title="Nematomorpha: information (1)" data-delay="250" data-total="2">Nematomorpha: information (1)</a> <a href="/accounts/Nematomorpha/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Nematomorpha: pictures (9)" data-delay="250">Nematomorpha: pictures (9)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Nemertea/" class="taxon-name rank-unspecified">Nemertea</a> <span class="vernacular-name">ribbon worms</span> <div class="features"> <a href="/accounts/Nemertea/" class="feature feature-information" rel="tooltip" data-original-title="Nemertea: information (1)" data-delay="250" data-total="1">Nemertea: information (1)</a> <a href="/accounts/Nemertea/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Nemertea: pictures (4)" data-delay="250">Nemertea: pictures (4)</a> <a href="/accounts/Nemertea/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Nemertea: specimens (1)" data-delay="250">Nemertea: specimens (1)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Onychophora/" class="taxon-name rank-unspecified">Onychophora</a> <span class="vernacular-name">velvet worms</span> <div class="features"> <a href="/accounts/Onychophora/" class="feature feature-information" rel="tooltip" data-original-title="Onychophora: information (1)" data-delay="250" data-total="2">Onychophora: information (1)</a> <a href="/accounts/Onychophora/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Onychophora: pictures (2)" data-delay="250">Onychophora: pictures (2)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Placozoa/" class="taxon-name rank-unspecified">Placozoa</a> <span class="vernacular-name">flat animals</span> <div class="features"> <a href="/accounts/Placozoa/" class="feature feature-information" rel="tooltip" data-original-title="Placozoa: information (1)" data-delay="250" data-total="1">Placozoa: information (1)</a> <a href="/accounts/Placozoa/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Placozoa: pictures (1)" data-delay="250">Placozoa: pictures (1)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Platyhelminthes/" class="taxon-name rank-unspecified">Platyhelminthes</a> <span class="vernacular-name">flatworms</span> <div class="features"> <a href="/accounts/Platyhelminthes/" class="feature feature-information" rel="tooltip" data-original-title="Platyhelminthes: information (1)" data-delay="250" data-total="40">Platyhelminthes: information (1)</a> <a href="/accounts/Platyhelminthes/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Platyhelminthes: pictures (31)" data-delay="250">Platyhelminthes: pictures (31)</a> <a href="/accounts/Platyhelminthes/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Platyhelminthes: specimens (4)" data-delay="250">Platyhelminthes: specimens (4)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Class</span> <a href="/accounts/Polyplacophora/" class="taxon-name rank-class">Polyplacophora</a> <span class="vernacular-name"></span> <div class="features"> <a href="/accounts/Polyplacophora/" class="feature feature-information" rel="tooltip" data-original-title="Polyplacophora: information (1)" data-delay="250" data-total="3">Polyplacophora: information (1)</a> <a href="/accounts/Polyplacophora/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Polyplacophora: pictures (12)" data-delay="250">Polyplacophora: pictures (12)</a> <a href="/accounts/Polyplacophora/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Polyplacophora: specimens (4)" data-delay="250">Polyplacophora: specimens (4)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Porifera/" class="taxon-name rank-unspecified">Porifera</a> <span class="vernacular-name">sponges</span> <div class="features"> <a href="/accounts/Porifera/" class="feature feature-information" rel="tooltip" data-original-title="Porifera: information (1)" data-delay="250" data-total="9">Porifera: information (1)</a> <a href="/accounts/Porifera/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Porifera: pictures (31)" data-delay="250">Porifera: pictures (31)</a> <a href="/accounts/Porifera/specimens/" class="feature feature-specimens" rel="tooltip" data-original-title="Porifera: specimens (9)" data-delay="250">Porifera: specimens (9)</a> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Rotifera/" class="taxon-name rank-unspecified">Rotifera</a> <span class="vernacular-name">wheel or whirling animals</span> <div class="features"> <a href="/accounts/Rotifera/" class="feature feature-information" rel="tooltip" data-original-title="Rotifera: information (1)" data-delay="250" data-total="1">Rotifera: information (1)</a> <a href="/accounts/Rotifera/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Rotifera: pictures (9)" data-delay="250">Rotifera: pictures (9)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Class</span> <a href="/accounts/Scaphopoda/" class="taxon-name rank-class">Scaphopoda</a> <span class="vernacular-name"></span> <div class="features"> <a href="/accounts/Scaphopoda/" class="feature feature-information" rel="tooltip" data-original-title="Scaphopoda: information (1)" data-delay="250" data-total="1">Scaphopoda: information (1)</a> <a href="/accounts/Scaphopoda/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Scaphopoda: pictures (1)" data-delay="250">Scaphopoda: pictures (1)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> <li> <span class="rank">Unspecified</span> <a href="/accounts/Tardigrada/" class="taxon-name rank-unspecified">Tardigrada</a> <span class="vernacular-name">water bears</span> <div class="features"> <a href="/accounts/Tardigrada/" class="feature feature-information" rel="tooltip" data-original-title="Tardigrada: information (1)" data-delay="250" data-total="4">Tardigrada: information (1)</a> <a href="/accounts/Tardigrada/pictures/" class="feature feature-pictures" rel="tooltip" data-original-title="Tardigrada: pictures (6)" data-delay="250">Tardigrada: pictures (6)</a> <span class="feature-off feature-specimens"></span> <span class="feature-off feature-sounds"></span> <span class="feature-off feature-maps"></span> </div> </li> </ul> </div> </div> </div> </div> </div> <div id="footer" aria-role="contentinfo"> <div class="inner-footer"> <div class="page-citation"> <p class="content">To cite this page: Myers, P. 2001. "Animalia" (On-line), Animal Diversity Web. Accessed November 25, 2024 at https://animaldiversity.org/accounts/Animalia/</p> </div> <div class="disclaimer"> <p class="content"><strong>Disclaimer:</strong> The Animal Diversity Web is an educational resource <strong>written largely by and for college students</strong>. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control. </p> </div> <div class="footer-links"> <ul class="unstyled"> <li><a href="https://www.umich.edu/">U-M Gateway</a> | <a href="https://lsa.umich.edu/ummz/">U-M Museum of Zoology</a></li> <li> <a href="https://lsa.umich.edu/eeb/">U-M Ecology and Evolutionary Biology</a> </li> <li> 漏 2020 Regents of the University of Michigan </li> <li><a href="/feedback/error_form/">Report Error</a> / <a href="/feedback/comment_form/">Comment</a></li> </ul> </div> <div class="thanks-links"> <p>This material is based upon work supported by the <a href="https://nsf.gov">National Science Foundation</a> Grants DRL 0089283, DRL 0628151, DUE 0633095, DRL 0918590, and DUE 1122742. Additional support has come from the Marisla Foundation, UM College of Literature, Science, and the Arts, Museum of Zoology, and Information and Technology Services. </p> <p> The ADW Team gratefully acknowledges their support. </p> </div> </div> </div> <script></script> </div> <script src="/static/js/jquery.colorbox.js"></script> <script src="/static/js/pica.information.js"></script> <script type="text/javascript"> var gaJsHost = (("https:" == document.location.protocol) ? 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ADW: Animalia: INFORMATION