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| | Cnidaria - Anemones |
 | | In the free-swimming medusa stage, such as jellyfish, the body shape is "umbrella-like" with a mouth at the base. | | | The two life stages of Cnidaria have similar simple body parts. | | | Can you think of reasons why one Cnidaria stage uses a sexual way of reproducing, while the other stage uses a non-sexual way of reproducing ? |
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http://www.mesa.edu.au/friends/seashores/cnidaria.html
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| | Systematics of Cnidaria |
| | However, a recent cladistic analysis (Schuchert, 1993) and avaliable molecular data suggest that the Anthozoa - the only group of living cnidarians that completely lacks a medusoid "jellyfish" stage in the life cycle - are in fact most primitive. | | | Traditionally, it was thought that the Hydrozoa were the most primitive cnidarians. | | | This seems consistent with the fossil record of the Cnidaria, but further studies will be needed to refine this picture of cnidarian evolution. |
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http://www.ucmp.berkeley.edu/cnidaria/cnidariasy.html
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| | Cnidaria |
| | Terms for direction, therefore, use the mouth as a point of reference. | | | In this exercise you will examine the three classes of Cnidaria - Hydrozoa, Scyphozoa, and Anthozoa. | | | The organisms in the phylum Cnidaria are characterized by exhibiting radial symmetry. |
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http://www.esu.edu/~milewski/intro_biol_two/lab_9_porifera_cnidaria/Cnidaria.html
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| | Cnidaria - Wikipedia, the free encyclopedia |
| | Wikibooks Dichotomous Key has more about this subject: | | | Finally, the extinct Conulariida may or may not be members of the Cnidaria. | | | Usually they are placed in their own phylum. |
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http://en.wikipedia.org/wiki/Cnidaria
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| | The Shape of Life . Cnidaria PBS |
| | This body, formed from tissues with organized groupings of muscles and nerves, allowed ancestral cnidarians to be the first animals on the planet to show animated behavior. | | | Learn more about Cnidaria in "Life on the Move" |
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http://www.pbs.org/kcet/shapeoflife/animals/cnidaria.html
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| | Cnidaria |
| | Class-level relationships in the phylum Cnidaria: Molecular and morphological evidence. | | | Class-level relationships in the phylum Cnidaria: Evidence from mitochondrial genome structure. | | | Cnidaria, therefore, is a well circumscribed taxon; it is considered by many to be a sister group of all metazoans other than sponges. |
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http://tolweb.org/tree?group=Cnidaria&contgroup=Animals
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| | Cnidaria on Encyclopedia.com |
| | Factors Controlling the Expansion Behavior of Favia favus (Cnidaria: Scleractinia): Effects of Light, Flow, and Planktonic Prey. | | | Class Anthozoa includes Cnidaria that have no jellyfish stage. | | | Two body forms and two lifestyles are characteristic of the Cnidaria (see polyp and medusa). |
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http://www.encyclopedia.com/html/section/Cnidaria_ClassAnthozoa.asp
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| | SYMBIOSIS |
| | During the research of this subject, it was found that hard corals were not the only cnidarians discovered as having a symbiotic relationship with dinoflagellates. | | | The symbiotic association between zooxanthellae and animals included in the phylum Cnidaria is most definitely significant in the subject of symbiosis. | | | The symbiotic association between the invertebrate phylum Cnidaria (Coelenterate) and the unicellular dinoflagellate algae, called zooxanthellae, is very common. |
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http://ag.arizona.edu/azaqua/algaeclass/symbios.htm
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| | Cnidaria (bluebottles, jellyfish, corals, sea anemones) |
| | Readable illustrated synthesis of the basic morphology, biology and ecology of Cnidaria. | | | Once placed as a separate phylum and also was sometimes placed in the group Cnidosporidia with the Microsporidia. | | | Cnidaria come in two main forms: polyps, that usually stays in one place (e.g. |
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http://www.museums.org.za/bio/cnidaria
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| | cnidaria |
| | As with the other cnidaria, hydra capture prey with nematocysts. | | | The name Cnidaria comes from the Greek word "cnidos", which means stinging nettle. | | | Casually touching many cnidarians will make it clear how they got their name when their nematocysts eject barbed threads tipped with poison. |
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http://www.wm.edu/act2online/projects/fahey03/cnidaria.html
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| | Jellyfish - Podocoryne carnea - Cnidaria - Zoology - Basel |
| | The striated muscle of the jellyfish is derived from this mesoderm-like structure. | | | Although Cnidaria are thought to be dibloblasts, there is a third cell-layer formed during medusa bud development. | | | This mesoderm-like "Glockenkern" or entocodon will give rise to the striated muscle of the swimming medusa. |
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http://pages.unibas.ch/dib/zoologie/research/schmid/jellyfish.html
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| | Nearctica - Natural History - Cnidaria and Ctenophora |
| | Many Cnidaria have both a polyp and a medusa form during their life cycle. | | | Although the Cnidaria have a basically simple, radially symmetric body plan despite superficial differences in the animals, there is more cell specialization than in the sponges. | | | Nearctica - Natural History - Cnidaria and Ctenophora |
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http://www.nearctica.com/nathist/miscanim/cnidaria.htm
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| | The Anemones, Corals and Jellyfish (Phylum Cnidaria) |
| | The Cnidaria come in two basic forms, a 'Polyp' form typified by the Sea Anemones and a 'Medusa' form typified by Jellyfish. | | | The word Cnidaria refers to Cnidocysts, specialised cells which contain the Nematocysts, the stinging organelles that allow the Cnidaria to subdue their prey. | | | The name Cnidaria has now pretty much replaced the older term of Coelenterata (pronounced selenterata) which these days is often applied to both the Cnidaria and the Ctenophora together, these two phyla are also known as the Radiate Animals because they both have radial or biradial symmetry. |
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http://www.earthlife.net/inverts/cnidaria.html
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| | Coelenterata |
| | Coelenterata was the original name for the phylum, and has been replaced by Cnidaria, to reflect a more restrictive grouping of these organisms, to exclude genetically unrelated organisms that may have coelenterons but not cnidae. | | | "Cnidaria" refers to the cnidae (threads) found in the stinging cells common to all members of the phylum, while "Coelenterata" refers the coelenteron (internal gut) common to all known members of the phylum. | | | Admin Note: You may also want to look into phylum Ctenophora [ten-off-or-ah] which contains the "comb jellies." These organisms resemble jellyfish but have a morphology distinct from true medusae. |
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http://www.sad42.k12.me.us/websites/science/coelenterata
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| | Search Results for cnidaria - Encyclopædia Britannica |
| | The planula body is more or less cylindrical or egg-shaped and bears... | | | Biological profile of the invertebrate group Cnidaria, including corals, jellyfish, and other aquatic organisms. | | | Chemoreception is doubtless the most crucial receptive capacity of cnidaria (e.g.,Hydra and jellyfish), but little is known about the organs involved. |
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http://www.britannica.com/search?query=cnidaria&submit=Find&source=MWTEXT
(326 words)
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| | Cnidaria Lecture 1 |
| | *there are many locomotory methods in the Cnidaria | | | Fig 114 Metazoan cladogram showing the position of the Cnidaria. | | | *in the Cnidaria the mesoglea and GVC are regulated |
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http://www.lander.edu/rsfox/310cnidaria1Lec.html
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| | Biology of Animals & Plants - Sponges & Cnidaria |
| | In many ways, animals from the Phylum Cnidaria seem very similar to sponges: these animals also have an outside (ectoderm or epidermis) and inside (endoderm or gastrodermis) cellular layer with a jellyish layer with roaming replacement amebocytes in between, and many Cnidarians are sessile, with swimming sperm and sometimes swimming larvae. | | | Kind of a window into a small group of researchers of obscure animals. | | | When you also consider that just being stung can panic and disorient someone enough to cause them to drown, it's obvious that in many ways these can be dangerous beasties. |
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http://faculty.fmcc.suny.edu/mcdarby/Animals&PlantsBook/Animals/02-Sponges&Cnidaria.htm
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| | Cnidaria, Laboratory Notes for BIO 1003 |
| | The Cnidaria are clearly distinct from other animals because they have tentacles with stinging cells called cnidoblasts. | | | Many members of the Cnidaria have a two part life cycle that includes a sessile (attached) polyp that reproduces asexually and a swimming medusa that reproduces sexually; everything you see is diploid, except eggs and sperm. | | | Each cnidoblast has a surface trigger and contains a nematocyst that, when fired, harpoons or entangles the prey or attacker and poisons it. |
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http://faculty.baruch.cuny.edu/jwahlert/bio1003/cnidaria.html
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| | Cnidaria |
| | Material covered in the seminars is tested on the lecture exams, not the lab practicals. | | | This phylum is also referred to by the older name, Coelenterata. | | | Things You Should Do Before Coming to the Lab on Cnidaria |
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http://www.csupomona.edu/~jomleong/classes/Zoo137/labparta/cnidaria.html
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| | www.myspace.com/cnidaria |
| | Rachel, our amazing drummer, has talent out of this world, armed with the ability to play almost any instrument she is a vital addition to Cnidaria. | | | The combination of the guitar and bass create a sound like no other. | | | With the combination of these musical talents Cnidaria was able to get their sound out quickly. |
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http://www.myspace.com/cnidaria
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| | Cnidaria Info Page |
| | The Cnidaria Newsgroup is a medium for exchange of information among members of the cnidarian research community. | | | Subscribe to Cnidaria by filling out the following form. | | | You can subscribe to the list, or change your existing subscription, in the sections below. |
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http://maillists.uci.edu/mailman/listinfo/cnidaria
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| | Coelenterate phylum (Cnidaria) Chemical Toxicity Studies |
| | Coelenterate phylum (Cnidaria) Toxicity Studies - Toxicology studies from the primary scientific literature on aquatic organisms | | | Home > Ecotoxicity Search > Cnidaria Organism Group Information | | | Note: Only partial study information is reported on these pages. |
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http://www.pesticideinfo.org/List_AquireAll.jsp?Species=1343&Effect=
(193 words)
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| | Cnidaria - Body Structure |
| | The cnidaria are true metazoa* with 2 body layers - an outer epidermis and an inner feeding surface or gastrodermis. | | | Between them is the non-cellular mesoglea, a gelatinous material which differs in thickness and structure amongst the different types of cnidarians. | | | Click on the section of Hydra to find out more about the different cell types in the layers. |
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http://www-biol.paisley.ac.uk/courses/Tatner/biomedia/units/cnid2.htm
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| | Cnidaria - Introduction |
| | They are radially symmetrical* animals, with one end of the body bearing the mouth and tentacles. | | | Division of labour is instead achieved by having different adult body forms, specialised for different functions - a feature called polymorphism*. | | | The phylum Cnidaria, formerly called Coelenterata*, contains the hydras |
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http://www-biol.paisley.ac.uk/courses/Tatner/biomedia/units/cnid1.htm
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| | CNIDARIA AND CTENOPHORES |
| | This page is concerned specifically with links to areas connected with the Cnidaria and Ctenophores. | | | A page highlighting the similarities and differences between the Cnidaria and Porifera. | | | The following is a list of several species of Cnidaria with definitions of each one: |
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http://www.bio.hw.ac.uk/marine/DIR/cnid.HTM
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| | Cnidarians and Ctenophores |
| | Many of them show a phenomenon known as an alternating life cycle, which includes a benthic stalked (polyp) form, and free-swimming jellyfish (medusa) form. | | | Hydrozoa are a class of jellyfish in the Phylum Cnidaria. |
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http://depts.washington.edu/fhl/zoo432/plankton/plcnidaria_ctenophore/cnidaria_cteno.html
(614 words)
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| | Phylum Cnidaria |
| | All cnidarians are radially symmetrical, and there are two main radially symmetrical body types. | | | Cnidaria is a phylum within Kingdom Animalia which consists of hydras, jellies (or jellyfish), sea anemones, and corals. | | | Life cycle diagram courtesy of The U-AZ Tree of Life |
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http://www.sidwell.edu/us/science/vlb5/Labs/Classification_Lab/Eukarya/Animalia/Cnidaria
(418 words)
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| | Cnidaria Home Page |
| | This WWW server is maintained at the University of California, Irvine for the use and benefit of the worldwide community of researchers studying all aspects of cnidarian biology. | | | The Phylum Cnidaria (British Marine Life Study Society) | | | The Cnidaria branch of the Tree of Life (U. Arizona) |
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http://www.ucihs.uci.edu/biochem/steele/cnidariahome.htm
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| | PHYLUM CNIDARIA: CLASS SCYPHOZOA |
| | However, most specialists in the Cnidaria now recognize the Cubozoa as a distinct class (Cubozoa) because of their unique life cycles, morphology, and nematocyst complement. | | | Many texts still combine the box jellies and their relatives (Cubomedusae) as an order within the Scyphozoa. | | | Some species of scyphozoan jellyfishes are notorious for their sting. |
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http://www.mbl.edu/BiologicalBulletin/KEYS/INVERTS/3/Dscyphozoakeys.htm
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| | MYXOZOA |
| | Here, we present both morphological and molecular phylogenetic evidence that the phylum must be abandoned because myxozoans have their origins in a clade of parasitic cnidarians. | | | None of the figures or data presented here can be reproduced without the consent of the authors or of the Journal of Parasitology. | | | The findings presented herein are published in Siddall, M. E., Martin, D.S., Bridge, D., Cone, D.M., Desser, S.S. The demise of a phylum of protists: Myxozoa and other parasitic Cnidaria. |
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http://research.amnh.org/users/siddall/myxozoa/myxo.html
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| | Cnidaria Lesson |
| | The most common examples are jelly fish, sea anemones, hydra and coral. | | | Members of the Phylum Cnidaria are have radial symmetry, jelly-like middles, and tentacles with stingers. | | | If you would like to comment or ask questions, contact: |
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http://www.kent.k12.wa.us/staff/timlynch/sci_class/chap13/cnidaria.html
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| | PHYLUM CNIDARIA |
| | To prepare: Read Exercise 8 in the lab manual and review the classification outline for Phylum Cnidaria in this guide. | | | In lab: Examine the display specimens and look for distinguishing characteristics. |
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http://www.aug.edu/biology/labcnidaria.htm
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| | Wonders of the Seas: Cnidarians |
| | The phylum Cnidaria (pronounced nid-AIR-ee-ah) contains approximately 9000 living species worldwide. |
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http://www.oceanicresearch.org/cnidarian.html
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| | Resources from www.BiologyBrowser.org |
| | BIOSIS is committed to providing researchers with efficient, comprehensive databases for locating the life sciences information they need | | | These pages contain a data base for several animal groups, including known species that have been reported from Jordan (Protozoa, Porifera, Cnidaria, Annelida, marine nematodes, molluscs, Echinodermata and arthropods) and vertebrates (Freshwater and marine fishes, amphibians and reptiles, birds and mammals) | | | Anthopleura mariscali, a new species of sea anemone (Cnidaria: Anthozoa: Actiniaria) from the Galapagos Islands |
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http://www.biologybrowser.org/cgi-bin/search/hyperseek.cgi?Terms=Cnidaria
(194 words)
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| | LABORATORY III - THE PORIFERA AND CNIDARIA |
| | Prepared Slides: Be sure to take only one at a time from the box on your table. | | | Read introduction sections to Porifera and Cnidaria (43-44; 59-64) |
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http://www.sfu.ca/~fankbone/v/lab03.html
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| | [No title] |
| | Acanthocephala Annelida Arthropoda Brachiopoda Bryozoa Cephalochordata Chaetognatha Chordata Ciliophora Cnidaria Ctenophora Cycliophora Echinodermata Entoprocta Gastrotricha General Gnathostomulida Hemichordata Insecta Kinorhyncha Loricifera Mesozoa Mollusca Nematoda Nematomorpha Nemertea Onychophora Onycophora Phoronida Placozoa Platyhelminthes Porifera Priapulida Rhombozoa Rotifera Sipunculata Sipunculida Tardigrada Trilobita Urochordata Vertebrata | | | Line drawings Annotated line drawings (cdr) Annotated diagrams (ppt) Photos Videos |
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http://biodidac.bio.uottawa.ca/thumbnails/catquery.htm?Kingdom=Animalia&phylum=Cnidaria
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| | Non-indigenous cnidaria in Puget Sound |
| | A number of lists of non-indigenous marine and aquatic species for Washington State have recently been developed without the specific guidance of taxonomic experts for various groups. | | | Commentary on species of Hydrozoa, Scyphozoa and Anthozoa (Cnidaria) |
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http://faculty.washington.edu/cemills/PScnidaria.html
(1548 words)
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| | Cnidaria |
| | The site is maintained by Assumption College and has a student rating system | | | Links to sites with photos and diagrams of the phylum Cnidaria. |
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http://www.mercy.edu/faculty/knizeski/cnidaria.html
(577 words)
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| | Cnidarian Jellyfish Tank, Moon Jellies, Kreisel Aquarium Design, Cnidaria Marine Aquariums and Coral Reef Aquarium ... |
| | Browse the Categories to the right, or enter a topic here | | | Cnidarian Jellyfish Tank, Moon Jellies, Kreisel Aquarium Design, Cnidaria Marine Aquariums and Coral Reef Aquarium Tank, Stand, Canopy, and Aquarium Filter System |
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http://www.masla.com/invert/cnidarian.html
(536 words)
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| | Hexacoral Author Details |
| | Suárez-Morales E., Zamponi M. and Gasca R. A survey of the reef-related medusa (Cnidaria) community in the western Caribbean Sea | | | Gasca R. New records and range extension for Siphonophora (Cnidaria) in the Mexican Atlantic [Nuevos registros y ampliacion de ambito de especies de Siphonophora (Cnidaria) en aguas del Atlantico mexicano] | | | Faunal list and commented bibliography of Mexican Siphonophora (Cnidaria: Hydrozoa) |
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http://hercules.kgs.ku.edu/hexacoral/anemone2/authordetail.cfm?authorid=4695
(319 words)
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| | Fauna Ibérica Cnidaria |
| | Avian, M.; Boero, F.; Mills, C.; Rossi, L. and Rottini-Sandrini, L. Cnidaria, Ctenophora. |
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http://www.fauna-iberica.mncn.csic.es/faunaib/cnidaria
(58 words)
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