41. Lab 5: Pylum Mollusca Phylum mollusca. Coelomate Animals. Molluscs are coelomate animals, that is, they possess a body cavity between the gut and the body wall that is completely http://www.biosci.ohiou.edu/introbioslab/Bios173/173_5.htm

BIOS 173 Lab 5 Phylum Mollusca Coelomate Animals Molluscs are coelomate animals, that is, they possess a body cavity between the gut and the body wall that is completely lined by mesoderm tissue. The coelom serves several important functions, such as providing space for the development and function of complex internal organs and providing a hydrostatic skeleton to facilitate the movements of soft-bodied animals. All of the rest of the phyla we will study this quarter are also coelomate. Recall that coelomates are subdivided into two groups: molluscs, annelids, and arthropods are protostome coelomates . The protostomes are distinguished by the fact that the mouth of these organisms is formed from the first opening in the embryonic gut. You may remember this first opening is called the blastopore and is formed during the gastrula stage of development. In contrast, the echinoderms and chordates are deuterostome coelomates . In deuterostomes the blastopore forms the anus, and the mouth is formed from a second embryonic opening. Keep in mind that grouping animals by these and other developmental similarities gives a clearer picture of the evolutionary relationships of organisms that externally may appear very dissimilar. (Review Buschbaum Chap. 24 for this discussion.) Mollusca Taxonomy Molluscs are a very large group that includes such diverse animals as chitons ( Class Polyplacophora ), clams, mussels, scallops, oysters (

42. Mollusca - LoveToKnow 1911 mollusca, one of the great phyla, or subkingdoms, of the animal pedigree or kingdom. The shell-bearing forms belonging to this group which were known to http://www.1911encyclopedia.org/Mollusca

Mollusca From LoveToKnow 1911 MOLLUSCA, one of the great " phyla," or sub-kingdoms, of the animal pedigree or kingdom. The shell -bearing forms belonging to this group which were known to Linnaeus were placed by him (in 1748) in the third order of his class Vermes under the name " Testacea," whilst the Echinoderms, Hydroids and Annelids, with the naked Mollusca, formed his second order termed " Zoophyta." Ten years later he replaced the name " Zoophyta " by " Mollusca," which was thus in the first instance applied, not to the Mollusca at present so termed, but to a group consisting chiefly of other organisms. Gradually, however, the term Mollusca became used to include those Mollusca formerly placed among the " Testacea," as well as the naked Mollusca. Aristotle to indicate a group consisting of the cuttle-fishes only. As now classified, the Mollusca consist of the following subdivisions: - Grade A. - Isopleura. Class I. - Amphineura (see Chiton Grade B. - Prorhipidoglossomorpha. Class II. - Gastropoda Class III. - Scaphopoda Class IV. -

43. Data Use Agreement - GBIF Portal Classification of Phylum mollusca. according to The Global Biodiversity Information Facility GBIF Data Portal Classification (based on Catalogue of Life http://data.gbif.org/species/browse/taxon/13140836

Skip to Content Skip to Sidebar Global Biodiversity Information Facility ... free and open access to biodiversity data search species/country/dataset Search Home Species Countries ... About Data Use Agreement Background The goals and principles of making biodiversity data openly and universally available have been defined in the Memorandum of Understanding on GBIF, paragraph 8 (see the relevant excerpts in the attached Annex). The Participants who have signed the MoU have expressed their willingness to make biodiversity data available through their nodes to foster scientific research development internationally and to support the public use of these data. GBIF data sharing should take place within a framework of due attribution. Therefore, using data available through the GBIF network requires agreeing with the following: 1. Data Use Agreements The quality and completeness of data cannot be guaranteed. Users employ these data at their own risk. Users shall respect restrictions of access to sensitive data. In order to make attribution of use for owners of the data possible, the identifier of ownership of data must be retained with every data record. Users must publicly acknowledge, in conjunction with the use of the data, the data providers whose biodiversity data they have used. Data providers may require additional attribution of specific collections within their institution.

44. Marine Biology Mollusca Whereas many mollusca have welldeveloped shells (snails, limpets etc.) while other have reduced shells (squid and some sea slugs) or no shell at all http://home.earthlink.net/~huskertomkat/mollus.html

Mollusca The phylum mollusca is the second most diverse animal phylum with over 50,000 living species and mostly. The mantle produces the shell. The advantage of a shell is to protect the creature and offer a portable home. It also has the disadvantage of taking more energy to move around. Whereas many mollusca have well-developed shells (snails, limpets etc.) while other have reduced shells (squid and some sea slugs) or no shell at all (octopuses). The advantage of having a reduced shell, or no shell at all, can be the animal's speed and its ability to get into small cracks and holes because of its size. Most mollusca have an open circulatory system expect for the class of cephalapode. This system is complete with a heart, blood vessels, and respiratory pigments. Gas exchange is via gills, lungs, or the body surface. Excretion takes place by means of kidneys that, like the digestive tract, pump waste into the mantle cavity. The disadvantage of an open circulatory system is in directing where the blood goes but an advantage is the organs are always covered by blood where blood empties into sinuses. Most mollusca's have a radula. This is a toothed tongue-like organ used for feeding and defense.

45. Mollusca — Infoplease.com mollusca (mul s ku) key, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50000 http://www.infoplease.com/ce6/sci/A0833641.html

Site Map FAQ in All Infoplease Almanacs Biographies Dictionary Encyclopedia Spelling Checker Daily Almanac for Apr 4, 2008 Search White Pages Skip Navigation Home Almanacs ... Word of the Day Editor's Favorites National Poetry Month Women's History Month Kosovo Country Profile School Shootings Timeline ... 2008 Calendar Search: Infoplease Info search tips Search: Biographies Bio search tips google_ad_client = 'pub-1894504138907931'; google_ad_width = 120; google_ad_height = 240; google_ad_format = '120x240_as'; google_ad_type = 'text'; google_ad_channel =''; google_color_border = ['336699','B4D0DC','DFF2FD','B0E0E6']; google_color_bg = ['FFFFFF','ECF8FF','DFF2FD','FFFFFF']; google_color_link = ['0000FF','0000CC','0000CC','000000']; google_color_url = ['008000','008000','008000','336699']; google_color_text = ['000000','6F6F6F','000000','333333']; Encyclopedia Mollusca Mollusca (m u u key , taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period. Mollusks are soft-bodied, and most have a prominent shell. The members of this highly successful and diverse phylum are mostly aquatic and include the familiar scallop clam oyster mussel ... chiton , and a variety of others. Mollusks occupy habitats ranging from the deep ocean to shallow waters to moist terrestrial niches. Certain mollusks, such as clams, squids, and scallops, constitute important food staples, and molluskan shells are highly valued by collectors. In times past these shells were used as money and today are used ornamentally for such items as buttons and jewelry. There are six classes of mollusks.

46. Mollusca Phylum mollusca (malus -kuh) A large and important group including snails, chitons, clams, squid and octopi. Typically molluscs have a shell. http://virtual.yosemite.cc.ca.us/randerson/Marine Invertebrates/mollusca.htm

Return to Menu Phylum Mollusca MJC Marine Bio Phylum: Mollusca: (ma-lus'-kuh): A large and important group including snails, chitons, clams, squid and octopi. Typically molluscs have a shell. The major body regions include a head, foot, visceral mass and mantle (a flap of tissue which secretes the shell and often encloses the gills in a mantle cavity). Click on the name for more information: Class Polyplacophora Class Gastropoda Class Bivalvia Class Cephalopoda

47. NMITA Mollusca: Gastropoda Dynamic Taxon Search Systematic List Taxa (Genera) Identification and Taxonomic Consistency molluscan Life Habits Databases References http://porites.geology.uiowa.edu/database/mollusc/mollsmnu.htm

Gastropods Contributors: Jonathan Todd , Department of Palaeontology, The Natural History Museum, London SW7 5BD, UK with assistance from Helena Fortunato and Jeremy Jackson, Smithsonian Tropical Research Institute; Daniel J. Miller and Peter Jung, Naturhistorisches Museum Basel. Dynamic Taxon Search Systematic List Taxa (Genera) Identification and Taxonomic Consistency ... References Photographs and descriptions modified after Jung, 1989. Revision of the Strombina Group (Gastropoda: Columbellidae), Fossil and Living. Birkhauser Verlag Basel, Switzerland, 298pp. [Copied with permission from: Die Kommission fur die Schweizerischen Palaontologischen Abhandlungen.] Last updated on April 26, 2006 - tsa.

48. Mollusca - Definition From Merriam-Webster's Medical Dictionary Definition of mollusca from MerriamWebster s Medical Dictionary with examples and pronunciations. http://medical.merriam-webster.com/medical/mollusca

Home Visit Our Sites Unabridged Dictionary Learner's Dictionary ... Contact Us Also Visit: Unabridged Encyclopedia Britannica Visual ESL: Learner's for Kids: Spell It! Word Central Dictionary Thesaurus Spanish/English Medical Search "Mollusca" in: Dictionary Thesaurus Spanish/English Open Dictionary Browse words next to: Mollusca Browse the Medical Dictionary: A B C D ... Z Mollusca 3 entries found for Mollusca To select an entry, click on it. (Click 'Go' if nothing happens.) Mollusca molluscum mollusca contagiosa Main Entry: Mol·lus·ca Pronunciation: m l s-k Function: noun plural a large phylum of invertebrate animals (as snails, clams, and mussels) that have a soft unsegmented body lacking segmented appendages and commonly protected by a calcareous shell Learn more about "Mollusca" and related topics at Britannica.com Find Jobs in Your City Pronunciation Symbols Products ... Advertising Info

49. Mollusca The Phylum mollusca is Greek for softbodied . It is the second largest invertebrate group (after the arthropods); some 100000 valid living species have http://www.wetwebmedia.com/mollusca.htm

Featured Sponsor Homepage Marine Aquarium Articles/ FAQs Daily FAQs SW Pix of the Day ... Cover Images Related FAQs: Mollusks Sea Slugs Related Articles: Gastropods/Snails Sea Slugs Abalone Cephalopods (Squid, Cuttlefish, Octopus) ... Chitons The Conscientious Marine Aquarist Mollusks: An Overview by Bob Fenner A Cyphoma gibbosum feeding on a fan The myriad mix of animals we call mollusks; clams really big and small, Chitons, octopus, snails, abalone, oysters, nudibranchs, sea hares, nautilus, squid, tusk shells and many more, are finally starting to get their due with marine aquarists. With improvements in water quality, foods, and collecting, transportation and handling technology what were once sure losers are being kept for months to years. I am amazed at the parallel worlds of aquarium and "shell-collecting" interests. In late 1994, I was privileged to present my views to the Southern California Marine Aquarium Conference on issues of the ethics, and government control of marine livestock trade practices. One weekend later, I gave almost the identical talk to the annual meeting of the Conchologists of America, Inc. (a national organization of shell collectors). Our concerns are the same; no one wants to see the natural resource/environment negatively impacted by their participation; neither group sees the real use of government intervention. You may have a total disinterest in mollusks up to this point, but should be aware of them as a group. If for no other reasoning than they may "show up" in your system as "extras" on live rock, macro-algae, other invertebrates or foods. Many are predatory on other invertebrates; anemones, sea urchins, other mollusks, and even fishes. A few can be fatally dangerous to the aquarist.

50. Mollusks Are The Second Largest Species Among Animals The Phylum mollusca refers to soft body animals. All mollusks have a common body plan, and a hard shell protects most. Many mollusks feed by using a sharp http://www.nvcc.edu/home/sotsuka/taxonomy/taxon/mollusca/index.htm

Mollusks are the second largest species among animals. The Phylum Mollusca refers to "soft body" animals. All mollusks have a common body plan, and a hard shell protects most. Many mollusks feed by using a sharp razor tongue like organ called radula to scrape up food. The three major classes of mollusks are; Class Gastropoda (include snails and slugs). Class Bivlavia (includes clams, mussels, and oysters), and Class Cephalopoda (include squids, octopi, and nautili). Click on each class and learn more about them. mailto:sotsuka@nvcc.edu

51. Mollusca Information Center We at the MIC are aware that there are growing controversies about the nature of mollusca what organism is responsible, whether or not it can truly be http://archive.groovy.net/dl/Clam/

330 New People Infected Every Hour! Mollusca Information Center Your guide to internet resources concerning mollusca , or "The Clam" 61% never see a doctor 80% don't tell their partners We at the MIC are aware that there are growing controversies about the nature of mollusca - what organism is responsible, whether or not it can truly be called a "disease," how many people are infected, and what, if anything, should be done about it. We hope that by providing arguments from all sides in an unbiased manner, without takng sides, we will be helpful in promoting dialog about this important issue. Soon we hope to allow immediate feedback and chat-like discussion in these pages, with secure anonymity guaranteed. Please be patient. NEW Sexprinting: Using Electrical Gene Resonance to Track Sexual Activity - mentions the good news that the mollusca gene sequence has been mapped. News from Medicine: New S.T.D. a Puzzle to Investigators by Bernard Taylor. A good overview of the various issues surrounding mollusca Symbiots, Parasites and Diseases: Taboo-based anticipatory labeling of 'The Clam'

52. Mollusca - Encyclopedia Of Earth Molluscs are softbodied invertebrates whose main features are a foot for locomotion, a mantle which secretes a hard calcium shell, a general head region, http://www.eoearth.org/article/Mollusca

Author Login Encyclopedia of Earth Search Earthportal Earthnews Encyclopedia of Earth Forum EoE Pages Home About the EoE Community of Scholars FAQs ... Reviews Browse the EoE Titles (A-Z) Author Topics Topic Editor ... Collections Mollusca Table of Contents Introduction Bivalva Introduction Morphology ... Idiosyncratic inverts Lead Author: Paul D. N. Hebert (other articles) Content Partner: Biodiversity Institute of Ontario (other articles) Article Topics: Zoology Natural sciences and Ecology This article has been reviewed and approved by the following Topic Editor: Sidney Draggan (other articles) Last Updated: October 11, 2007 Introduction Molluscs are soft-bodied invertebrates whose main features are a foot for locomotion, a mantle which secretes a hard calcium shell, a general head region, and a stomach area for digestion. Molluscs are very diverse with about 110,000 species distributed in terrestrial, freshwater and marine environments. The Gastropoda (snails) include the largest number of species comprising over three quarters of species in this phylum. The Bivalva (clams/oysters/mussels) is less diverse but also a very important group. Bivalva Introduction (Source: Biodiversity Institute of Ontario Bivalves are the clams and mussels of our freshwater lakes . The word Bivalva (Bi= "two", valva="shells") is a misnomer. Actually, there is only a single shell secreted with a left and right lobe. Many people tend to think that one half of a clam shell is the top and the other is the bottom. Actually, these animals are laterally flattened – there is a shell on the lefthand side and the right hand side. The mouth (incurrent canal) and anus (outcurrent canal) are located at the anterior end, and while the foot extends out the posterior.

53. Florida Nature: Mollusca - (molusks) Florida Nature mollusca (molusks) mollusca (molusks). mollusca Taxonomy Species on this site. Home Search Photo Index Contributions http://www.floridanature.org/phylum.asp?phylum=Mollusca

54. Index To Organism Names (ION) - Mollusca a further abyssal Eulimid from the Antarctic (mollusca, Gastropoda, Eulimidae). .. a new species of Angariidae from Western Australia (mollusca http://www.organismnames.com/RSS/3569.xml

http://www.organismnames.com Index to Organism Names RSS Updated every month en-gb http://www.organismnames.com/about.htm http://www.thomson.com/images/misc/logo_thomson.gif http://www.biosis.com

55. DMC Species-Mollusca mollusca, Amphineura, Ischnochiton, albus ischnochiton. mollusca, Anopla, Zygeupolia, sp. mollusca, Gastropoda, Neptunea, lyrata decemcostata http://www.dmc.maine.edu/species-mollusca.html

56. Mollusca PHYLUM PORIFERA CNIDARIA CTENOPHORA PLATYHELMINTHES NEMERTINEA SIPUNCULIDA ANNELIDA ARTHROPODA BRYOZOA BRACHIOPODA mollusca http://library.thinkquest.org/26153/marine/mollusca.htm

MOLLUSCA PHYLUM: PORIFERA CNIDARIA CTENOPHORA PLATYHELMINTHES ... BRACHIOPODA MOLLUSCA ECHINODERMATA CHORDATA BACK TO : KINGDOM ANIMALIA (Latin.mollis = soft) This phylum is one of the largest marine groups with over 80 000 species. All comprise of a soft, unsegmented body, consisting of an anterior head, a dorsal visceral mass and a ventral foot.The body is more or less surrounded by a fleshy mantle (an outgrowth of the body wall) and nearly all species in the group secrete a lime shell that covers and protects the body. All, except the class Bivalvia , have a ribbon-like rasping tongue (radula - unique to this phylum) with small chitinous teeth that processes the food. Most mollusks are free living, but slow moving creatures, showing a close association with the substrate. Some attach to rocks or shells, others burrow, others float, octopuses and squids swim freely. Characteristics: 1. Body usually short and partially or wholy enclosed by a fleshy outgrowth of the body wall called the mantle, which may be variously modified. Between the mantle and the visceral mass is a mantle cavity containing components of several systems (secondarily lost in a few groups). 2. A shell (if present) is secreted by the mantle and consists of one, two or eight parts. the head and the ventral muscular foot are closely allied (the foot being variously modified for burrowing, crawling, swimming, or food capture).

57. Pseudohermaphroditism In Ilyanassa Obsoleta (Mollusca: Neogastropoda) -- Jenner Pseudohermaphroditism in Ilyanassa obsoleta (mollusca Neogastropoda). MG Jenner. Field studies, a rearing and maintenance program, and a transfer http://www.sciencemag.org/cgi/content/abstract/205/4413/1407

Jump to: Page Content Section Navigation Site Navigation Site Search ... Account Information , or Site Tools Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be. Site Tools Site Search Site Area Science Magazine Daily News Science Signaling SAGE KE Science Careers All HighWire Journals Terms Advanced Account Information Guest Alerts Access Rights My Account Sign In Site Navigation Readers Members Authors Librarians Advertisers Current Issue Previous Issues Science Express ... 28 September 1979 Article Views Abstract References Full Text (PDF) Article Tools Save to My Folders Download Citation Alert Me When Article is Cited Post to CiteULike ... View PubMed Citation Related Content Similar Articles In: Science Magazine PubMed Search Google Scholar for: Articles by Jenner, M. Articles Citing This Article Search PubMed for: Articles by Jenner, M.

58. Molecular Phylogeny Of Coleoid Cephalopods (Mollusca: Cephalopoda) Inferred From Molecular phylogeny of coleoid cephalopods (mollusca Cephalopoda) inferred from three mitochondrial and six nuclear loci a comparison of alignment, http://mollus.oxfordjournals.org/cgi/content/short/73/4/399

@import "/resource/css/hw.css"; @import "/resource/css/mollus.css"; Skip Navigation Oxford Journals Contact Us My Basket ... Volume 73, Number 4 Pp. 399-410 Previous Article Next Article Journal Molluscan Studies Advance Access originally published online on November 7, 2007 Journal of Molluscan Studies 2007 73(4):399-410; doi:10.1093/mollus/eym038 This Article Full Text Full Text (PDF) All Versions of this Article: most recent Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal ... Request Permissions Google Scholar Articles by Strugnell, J. Articles by Nishiguchi, M. K. PubMed Articles by Strugnell, J. Articles by Nishiguchi, M. K. Social Bookmarking What's this? Molecular phylogeny of coleoid cephalopods (Mollusca: Cephalopoda) inferred from three mitochondrial and six nuclear loci: a comparison of alignment, implied alignment and analysis methods Jan Strugnell and Michele K. Nishiguchi

59. Mollusca: Free Encyclopedia Articles At Questia.com Online Library Research mollusca and other related topics by using the free encyclopedia at the Questia.com online library. http://www.questia.com/library/encyclopedia/101259306

Highlight the text above with the cursor. Use (ctrl + c) to copy and (ctrl + v) to paste. Mac users use (cmd + c) to copy and (cmd + v) to paste. Login Bookmark this page Link to this page Home ... Encyclopedia Index MOLLUSCA scallop clam oyster mussel ... chiton , and a variety of others. Mollusks occupy habitats ranging from the deep ocean to shallow waters to moist terrestrial niches. Certain mollusks, such as clams, squids, and scallops, constitute important food staples, and molluskan shells are highly valued by collectors. In times past these shells were used as money and today are used ornamentally for such items as buttons and jewelry. There are six classes of mollusks. Anatomical Features Although highly diverse, all members of the phylum share certain general features. Most have a well-developed head, which may bear sensory tentacles; in some, like the clam, the head is very reduced. The Body Wall All mollusks possess a flexible body wall, which surrounds a body cavity containing the internal organs. The wall, which varies greatly in shape in different species, is usually folded to form a structure called the mantle, which is attached at the top of the body and surrounds it like a tent; the shell is formed on the outside of the mantle. On the underside of the body the wall is usually stretched out to form a thickened mass called the foot. The wall is covered by an outer epidermis and an underlying dermis. The epidermis usually contains gland cells that secrete mucus, which in mollusks has a variety of important uses, such as locomotion, food entrapment, and prevention of water loss. Muscle tissue is found in the body wall, and is particularly plentiful in the foot, which is used for locomotion in most mollusks (although some swim and some are sedentary), and in the mantle in species with reduced shells.

60. 194 Manually Selected Sites About Mollusca CBEL 185 mollusca Science Technology sites, last updated on 2 January 2008 Check List of European Marine mollusca Aquatic mollusca of Illinois http://www.cbel.com/mollusca/

Mollusca CBEL >> 194 Mollusca sites, last updated on 31 March 2008 Pages A-D Pages E-H Pages I-O Pages P-S ... [Find on this page] Gastropoda Caenogastropoda Crepidula ustulatulina Crepidula depressa: Depressed Slip... Crepidula atrasolea: Eastern White... Crepidula aculeata: Spiny Slippersnail ... Pterotracheoidea Gastropoda Mesogastropoda The Apple Snail Pomacea paludosa: Florida Apple Snail Littorina irrorata: Periwinkle East Coast Epitoniids ... Bellamya japonica: Japanese Myster... Gastropoda Neogastropoda Atlantic Oyster Drill Ilyanassa obsoleta: Mud Snail Hadorns Fusinus Hadorns Fusinus ... Busycon carica and Buccinum undatum Gastropoda Cypraeidae The Marginata Site of Cypraea Lovers Felix Lorenzs Cowries Page Cypraeidae Gastropoda Archaeogastropoda Worldwide Abalone Distribution The Biogeography of the Red Abalon... Paua Order Archaeogastropoda ... Abalone Gastropoda Prosobranchs Cone Shell and Conotoxin Gastropoda Publications The Sequestering of Secondary Comp... Shade Preference in Dorid Nudibran... Sea Challengers Laboratory Culture of the Aeolid N... ... A List of the Worldwide Food Habit... Monoplacophora Phylum Mollusca: Class Monoplacophora Monoplacophora Class Monoplacophora Scaphopoda Tusk Shell The Scaphopod Page Introduction to the Scaphopoda Class Scaphopoda Polyplacophora Living Chitons Katharina tunicata: Katy Chiton Gallery of Chitons Gastropoda Pulmonates Tree Snails of Florida Trail of the Snail Theba pisana: White Garden Snail The House of Slime ... The Giant African Land Snail Gastropoda Pulmonates (part 2) The Development of Physella, a Fre...

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