Phylum mollusca the shape of life the story of the. The phylum mollusca is the secondlargest animal phylum, with over 100,000 species. This page was last edited on 10 december 2019, at 12. The heart is key to keep the blood pressure regulated. Flattened with dorsal complete shell class gastropoda35 000 sp. Morphological hypotheses generally placed the caudofoveata and solenogastres as plesiomorphic based on their simple wormlike body plan and lack of a shell kocot et al. Gastropods phylum mollusca, class gastropoda including forms commonly known as snails and slugs, the gastropods are the most diverse taxonomic class within the phylum mollusca, with an estimated 60,000 80,000 known living species, accounting for over 80% of all known living mollusks.
They have huge numbers inshore, that is, in shallow wahe largest marine phylum, with about 85,000 living species, 23% of all named marine organisms. Pdf on nov 1, 2017, victoriano urgorri and others published filo mollusca. Other than worm like classes, all descended from ham. However, it is not a legal authority for statutory or regulatory purposes. Brusca and others published phylum mollusca find, read and cite all the research you need on. Phylum mollusca is one of the most conspicuous invertebrate animals. Home interesting facts contact reproduction and circulatory system body plan and symmetry shells jokes for the folks interesting facts 1. Phylum mollusca the shape of life the story of the animal. Superficially, the shells resemble those of brachiopods see.
Currently there are an estimated 75 thousand species, plus 35 thousand species in the fossil record. The molluscs include many familiar animals, including clams, snails, slugs, and squid, as well as some less familiar animals, like tusk shells and chitons fig. Molluscs comprise the familiar animals commonly known for both their shells and fine seafood, including snails. Mollusks are the largest marine phylum, comprising about 23% of all the named marine organisms. Bathyal mollusca from the coldwater coral biotope of santa maria di leuca apulian margin, southern italy. Files are available under licenses specified on their description page. Hosted by the usgs core science analytics and synthesis. Flattened with dorsal segmented shell class monoplacophora25 sp. Phylum mollusca bio 2215 oklahoma city community college dennis anderson phylum mollusca numbers of species molluscs 50,000 100,000 living species 35,000 extinct species largest pounds 80% less than 5 cm soft body most have a shell most marine snails terrestrial most habitat phylum mollusca ventral foot locomotion mantle encloses mantle cavity shell radula. Mar 30, 2008 ben and tori tell the touching story of two young lovers of the phylum mollusca in this awe inspiring puppet musical.
All structured data from the file and property namespaces is available under the creative commons cc0 license. Today well be looking at a wellknown, large phylum of invertebrate animals, called mollusca whose members are most often referred to as molluscs, of which around 85,000 extant species are recognised. Phylum mollusca bivalves phylum mollusca, class bivalvia bivalves are invertebrates belonging to the phylum mollusca that possess a mineralized shell made of calcium carbonate consisting of two hinged halves valves that enclose the soft body of the organism. A study of the type series of nautilus pompilius linnaeus, 1758 mollusca, cephalopoda, nautilida svetlana v. Molluscs are found in nearly all freshwater and marine environments, and some are found also on land. Molluscs or mollusks are an important phylum of invertebrate animals. Mollusc simple english wikipedia, the free encyclopedia. Page designed through the cooperative efforts of interagency itis teams. The number of fossil species is estimated between 60,000 and 100,000 additional species. Phylum mollusca bio 2215 oklahoma city community college dennis anderson phylum mollusca numbers of species molluscs 50,000 100,000 living species 35,000 extinct species largest pounds 80% less than 5 cm soft body most have a shell most marine snails terrestrial most habitat phylum mollusca ventral foot locomotion mantle encloses mantle cavity shell radula coelom eucoelomate. The body of molluscs is unsegmented with a distinct head, muscular foot and visceral hump. Mollusks better known as snails,clams, and other relatives all mollusks have soft bodies their name is derived from the latin word mollus meaning soft.
Mollusca medical definition merriamwebster medical dictionary. Chiton, the name 1 given to fairly common littoral animals of rather small size which belong to the phylum mollusca, and, in the possession of a radula in the buccal cavity, resemble more especially the gastropoda. Many, however, occur in fresh water and some even in damp soil. In this article we will discuss about the general characters and classification of phylum mollusca. Wormlike marine burrowers class solenogastres250 sp. Ben and tori tell the touching story of two young lovers of the phylum mollusca in this awe inspiring puppet musical. Mollusca definition, the phylum comprising the mollusks. Mollusca is the second largest phylum of invertebrate animals. Covers details of the phylum mollusca learn with flashcards, games, and more for free. Mollusca is the secondlargest phylum of invertebrate animals after the arthropoda. Wormlike marine surface dwellers class polyplacophora950 sp. Brusca and others published phylum mollusca find, read and cite all the research you need on researchgate.
Around 85,000 extant species of molluscs are recognized. The word mollusc comes from the latin meaning soft, a good description of the groups fleshy bodies. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. Of course, in an ocean filled with predators, a soft body is easily eaten. What are the four most common and diverse classes of molluscs. Animals in phylum mollusca have an open circulatory system, but also often have a heart that pumps blood. Oysters radula tounge like organ with rows of teeth. Phylum mollusca article about phylum mollusca by the free. Relationships of mollusca evolutionary hypotheses for the major groups of molluscs are controversial largely because of the extreme diversity in the phylum. Cuttlefish meaning of the name unique characteristics the meaning of phyllum mollusca comes from the latin word mollusk which means soft of body. Molluscs are soft bodied animals, often with hard shells for protection. The animals in phylum mollusca all have bilateral symmetry. Consist of three basic parts, a foot, a visceral mass, and a mantle bilaterally symmetrical. Molluscs comprise the familiar animals commonly known for both their shells and fine seafood, including snails, clams, octopus and squid.
Caracteristicas generales del phylum mollusca moluscos. Mollusks are the second largest phylum in the animal kingdom after the phylum arthropoda. Apr 02, 2018 today well be looking at a wellknown, large phylum of invertebrate animals, called mollusca whose members are most often referred to as molluscs, of which around 85,000 extant species are recognised. The early molluscs that happened to develop hard shells not only. Introductionmollusca is the latinfor softincludes snails, squids,nautilus, octopus,clams, etc. Members of this phylum have soft, unsegmentated bodies usually enclosed, wholly or partly, in a shell composed of calcium carbonate. Mollusks live in marine, freshwater and terrestrial. Mollusks have a dramatic variety of form, ranging from large predatory squids and octopus, some of which show a high degree of intelligence, to grazing forms with elaborately sculpted and colored shells. Members of this phylum have soft, unsegmentated bodies usually enclosed. Phylum mollusca the mollusca include chitons, clams, oysters, snails, slugs, squids, nautilus and octopuses. The group mollusca, established by cuvier 1798, comprises of almost 1,00,000 species and is the second largest animal. Clams, snails, slugs, nautilus, squid, octopus molluscs show an amazing degree of diversity, yet all have certain features in common. Molluscs show an amazing degree of diversity, yet all have certain features in common. Structure soft bodied animals name from latin word mollus meaning soft most are protected by a hard shell made of calcium carbonate have a reduced internal cell or have lost the shell completely during evolution.
1383 779 900 794 433 1100 503 1538 843 737 815 910 1615 948 848 51 1284 27 49 977 1423 659 836 124 955 1174 1030 484 1359 84 358 44 195 1189 316 124 892 376 428 789 876 521