what are the 7 classes of mollusks

Types of Mollusks. The study of mollusks is called malacology (mal-uh-col-oh-gee) which means “the study of animals with soft bodies.” The seven living classes of mollusks are Aplacophora, Bivalva, Cephalopoda, Gastropoda, Monoplacophora, Polyplacophora and Scaphopoda. The smallest mollusks are snails that are microscopic in size. There are approximately 160,000 living species and probably 70,000 extinct species of mollusks. The smallest mollusks are snails that are microscopic in size. Although the phylum Mollusca are made up of a set of incredibly diverse animals, there are certain characteristics which aid to classify them. They have three pairs of ganglia and two nerve c ords. Mollusks are classified by number of shells or foot shape. The thorn shell, Acanthina angelica The phylum Mollusca is the second most diverse phylum after Arthropoda with over 110,000 described species. Mollusks refer to are a large group of soft-bodied invertebrate animals. There are approximately 160,000 living species and probably 70,000 extinct species of mollusks. Whether you are looking to discover mollusks characteristics, classification of mollusca and/or information about all types of mollusks, this article is for you. Gastropods include snails. The bodies of animals are made up of differentiated tissues to perform an equally specialized task, sometimes in to or three levels of differentiation (excluding sponges). Types of Mollusks. The major classes of living mollusks include gastropods, bivalves, and cephalopods (Figure below). Gastropods include snails. The three main types of mollusks are gastropods, bivalves, and cephalopods. Mollusks are classified by number of shells or foot shape. 1 / Gastropods are single shells coiled around a center axis. Bivalves include clams, oysters, mollusks, clams, and many other affiliated shell families. The current 7 extant classes include the following. The bivalves have sensory cells enabling them to distinguish touch, chemical changes, and light. The Phylum Mollusca is estimated to include 100,000 species. Monoplacophora Fig. The remaining classes (Polyplacophora, Aplacophora, and Monoplacophora) have fewer species. Gastropods make up the largest class of mollusks, and they include both snails and slugs. They are typically divided into ten classes, of which two are extinct. Mollusks may be primitively segmented, but all but the monoplacophorans characteristically lack segmentation and have bodies that are to some degree spirally twisted (e.g. torsion). Phylum: Mollusca Mollusca itself has 9 classifications, with 7 extant representativies and 2 extinct classes. They are typically divided into ten classes, of which two are extinct. Gastropods, like slugs and snails, can live on land or in the water. The Animal Kingdom contains these seven Phyla: Porifera, Cnidaria, Platyhelminthes, Annelida, Mollusca, Arthropoda, and Chordata. Bivalves: A class of marine and freshwater mollusks with compressed bodies within a shell. BIVALVES The current 7 extant classes include the following. Mollusks are subdivided into seven classes with most species found in three of those classes: Gastropoda, Bivalvia, and Cephalopoda. GASTROPODS This class has more than 60 000 unknown species, making it the largest. GASTROPODS This class has more than 60 000 unknown species, making it the largest. Phylum: Mollusca Mollusca itself has 9 classifications, with 7 extant representativies and 2 extinct classes. Up of a set of incredibly diverse animals, there are approximately 160,000 living species and probably extinct... A class of marine and freshwater mollusks with compressed bodies within a shell are subdivided seven... Three main types of mollusks, bivalves, and many other affiliated shell families they three... 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