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Mollusca

Mollusca. By: Miranda & Ashley :]. Mollusca Characteristics. Bilaterally symmetrical. Body has more than two cell layers, tissues and organs. Body without cavity. Body possesses a through gut with mouth and anus.

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Mollusca

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  1. Mollusca By: Miranda & Ashley :]

  2. Mollusca Characteristics • Bilaterally symmetrical. • Body has more than two cell layers, tissues and organs. • Body without cavity. • Body possesses a through gut with mouth and anus. • Body monomeric and highly variable in form, may possess a dorsal or lateral shells of protein and calcareous spicules. • Has a nervous system with a circum-oesophagal ring, ganglia and paired nerve chords. Ramel, Gordon. "The Molluscs (Phylum Mollusca)." The Earth Life Web. Web. 04 Apr. 2011. <http://www.earthlife.net/inverts/mollusca.html>.

  3. Mollusk Facts • Mollusks eat a wide range of material. • Mollusks live in most environments. • After the Arthropods the Molluscs are the most successful of the animal phyla in terms of numbers of species. • There are about 110,000 species known to science most of which are marine.

  4. Bivalvia • Bivalves have shells made up of 2 asymmetrically rounded halves called valves that are mirror images of each other • They need fresh water to breathe, reproduce and eat • Most species burrow into mud and sand. • Most bivalves eat bits of plants and animals floating in the water. • A few species collect food from the bottom • Others absorb nutrients directly into their bodies http://animals.jrank.org/pages/1908/Bivalves-Bivalvia.html Bivalves: Bivalvia - Physical Characteristics, Behavior And Reproduction, Bivalves And People, Conservation Status, Black-lipped Pearl Oyster (pinctada Margaritifera): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET

  5. Giant Clam(Bivalvia) Phylum:Mollusca Class:Bivalvia Subclass:Heterodonta Order: incertae sedis Family:Tridacninae Genus:Tridacna Species:T. gigas

  6. Giant Clam • The Giant Clam is the largest immobile mollusc in the world, reaching up to 6 feet in length. • Once a Giant Clam settles somewhere it stays there for the rest of its life. • They live in tropical waters, and feed on plant and animal matter. • Giant clams are eaten by humans • Giant clams generally have bad interaction with humans because humans decrease the clam population with hunting. :] • Human pollution affects Giant Clams because humans pollute the water they live in • They are endangered • They are hunted by humans for a muscle that is eaten in many countries. • Marine Parks throughout the world are working to protect clams. • Clam Video :] • "Giant Clam." True Wild Life True Wild Life. Web. 25 Mar. 2011.Source

  7. Gastropods • Gastropods are the largest variety of mollusks • There are over 90,000 different types of Gastropods. • They occupy every habitat on earth • It is the only class to contain species that have ventured permanently on to land. • Over 15,000 fossil forms have been described and over 90,000 species exist today • Gastropods exhibit the least change from the ancestral molluscan plan of all the molluscs.

  8. G. Atlanticus Kingdom:Animalia Phylum:Mollusca Class:Gastropoda Superfamily:Aeolidioida Family:Glaucidae Genus:Glaucus Common Name: Nudibranch

  9. Glaucus Atlanticus • A species of medium-sized blue sea slug • They are between 5 and 8 centimeters in length • They live Tropical waters • They prey on other larger pelagic organisms like the dangerously venomous Portuguese man o’ war • If there is no food around, they will resort to cannibalism and eat other G. Atlanticus • They float upside down • They are not eaten by humans • Human pollution affects the water they live in • They are not endangered • Humans havent really taken any steps to protect them • They are not hunted by humans • Human interaction is neutral.

  10. Cephalopods • Cephalopods are found in all of the worlds oceans • Cephalopods have 3 hearts, and blue blood • All species of cephalopods are marine • There are 800 living types • They grow fast, reproduce, and die over a short period of time. • They were once one of the dominant life forms of the oceans.

  11. Giant SquaidArchiteuthis dux Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Order: Teuthida Suborder: Oegopsina Family: Architeuthidae Genus: Architeuthis Species: Architeuthis dux Geographic Range

  12. Giant Squid Facts • Giant squids can grow to over 26 feet. • Giant squid eat hoki fish (the same fish used in McDonalds filet o fish sandwiches. Yum:]), and shrimp • They are the largest invertebrate on earth • They have the largest eyes in the animal kingdom, measuring 10 inches in diameter  • They move with fins, and use their funnel as a propulsion system, drawing water main part of the body, and forcing it out the back • Giant squid carcasses have been found in all the worlds oceans • Giant squids are usually not eaten by humans, but it porbably is possible. • Because they live where humans rarely go, its hard to tell whether they are endangered or not. • There are no protection efforts for the giant squid

  13. Resources :] • Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2008. The Animal Diversity Web (online). Accessed March 25, 2011 at http://animaldiversity.org. • Postlethwait, John H., and Janet L. Hopson. Modern Biology. Orlando: Holt, Rinehart and Winston, 2006. Print.

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