The phylum mollusca
Learn about the animal phylum mollusca and its most important body systems mollusca includes a wide range of common invertebrate species that can. Phylum mollusca class pelecypoda pelecypods have two shells, or bivalves, that protect the soft parts of the animal the valves are generally of equal size (except in groups like the oysters) and shape and are hinged at the back. Mollusca snails, clams, mussels, squids, octopi, chitons, and tusk shells click on an image to view larger version & data in a new window this tree diagram shows the relationships between several groups of organisms. Mollusca is one of the most diverse groups of animals on the planet, with at least 50,000 living species (and more likely around 200,000) it includes such familiar organisms as snails, octopuses, squid, clams, scallops, oysters, and chitons mollusca also includes some lesser known groups like the. Most molluscs are marine molluscs are very ancient organisms believed to have evolved from a flatworm like ancestor during the precambrium about 650 million years ago. The octopus belongs to the phylum mollusca in the animalia kingdom the phylum contains a large number of aquatic life forms in addition to the octopus, such as squid, mussels and oysters. The phylum mollusca is characterized more by diversity than uniformity, though modern molluscs do all tend to share certain features, including the presence of a radula (a tonguelike ribbon of.
Mollusca definition, the phylum comprising the mollusks see more. There currently are almost 40 recognized phyla the name porifera means pore-bearing this phylum is commonly called sponges the number of species is estimated to be between 5,000 and 10,000 all are aquatic and almost all are marine animals in this phyla have no true tissues, which means, for. This video goes over the characteristics of the phylum mollusca third party content- ted talks this video is used for educational purposes and therefore is e. The protostomes are divided into two groups: 1 phylum mollusca the molluscs include a variety of familiar animals such as snails , clams , abalone, octopus and squid there are about 70,000 described species within this phylum.
Bio 5 general biology phylum mollusca 1 the phylum mollusca is a large and diverse group of animals that includes clams, scallops, oysters, snails, slugs, squid, octopus, and chamber nautilus the phylum shares features with other animal phyla the mollusks are bilaterally symmetrical, have an organ system level of body organization, have a. Most animals within the mollusca phylum have an open circulatory system cephalopods have a closed circulatory system within a open circulatory system blood is not restricted to circulating within the blood vessels. 1 figure 1 examples of a polychaete, oligochaete, and leech (class hirudinea) phyla annelida and mollusca phylum annelida: segmented worms phylum mollusca: bivalves, chitons, snails, and octopuses. List of animal phyla is a list of the major groups of animals usually classified as a phylum has pelagic larvae a minor phylum mollusca: a great phylum by number of species and by variety of body forms largely aquatic hugely important fossil record from the lower cambrian.
Free living aquatic forms (freshwater or marine), some amphibious body is soft and unsegmented enclosed in a glandular mantle covered by usually a shell. Mollusca is the second largest phylum in terms of species it is made up of over 110,000 species most of these species are aquatic the species in this phylum live in diverse environments which can range from arctic seas to tropical streams to high mountainsides.
The phylum mollusca
The phylum mollusca is made up of a large group of species that all share certain characteristics: a muscular foot for movement, a sheet of tissue called the mantle surrounding the organism, (usually) a hard shell secreted by the mantle, sometim. Reading quiz this activity contains 24 questions members of the phylum mollusca _____ which phylum includes the simplest exhibits bilateral symmetry, and has jointed appendages what phylum does this newly discovered organism belong to sea stars and sand dollars belong to a.
Brief summary the phylum mollusca contains some of the most familiar invertebrates, including snails, slugs, clams, mussels, and octopuses in contrast to these well-known molluscs, however, others are almost never seen, such as the aplacophorans and monoplacophorans, the latter of which which were only known from paleozoic fossils until the. Define phylum mollusca phylum mollusca synonyms, phylum mollusca pronunciation, phylum mollusca translation, english dictionary definition of phylum mollusca noun 1 phylum mollusca - gastropods bivalves cephalopods chitons mollusca animal kingdom, animalia, kingdom animalia - taxonomic kingdom comprising all. Mollusca (mollusca) in uska phylum han animaliaan phylum nga mollusca naglalakip hin 14168 ka mga species, sumala ha catalogue of life an kladograma hini sumala ha catalogue of life. Mollusca is a large phylum of invertebrate animals whose members are known as molluscs or mollusks (/ ˈ m ɒ l ə s k /)around 85,000 extant species of molluscs are recognized the number of fossil species is estimated between 60,000 and 100,000 additional species molluscs are the largest marine phylum, comprising about 23% of all the named.
Molluscabase molluscabase is a taxonomically oriented database which aims to provide an authoritative it is possible to find examples of virtually every feeding strategy in the phylum mollusca these include active predators such as neogastropods and cephalopods. 1 mollusks are the second largest phylum in the animal kingdom after the phylum arthropoda currently there are an estimated 75 thousand species, plus 35 thousand species in the fossil record. The phylum mollusca contains some of the most familiar invertebrates, including snails, slugs, clams, mussels, and octopuses in contrast to these well-known molluscs, however, others are almost never seen, such as the aplacophorans and monoplacophorans, the latter of which which were only known from paleozoic fossils until the first live. Phylum mollusca general description top shells the molluscs (americans spell it as 'mollusks') constitute one of the largest phyla of animals, with close to 112,000 species to be found worldwide the scientific study of molluscs is known as malacology. Biology 18 spring, 2008 1 lab 5: phylum mollusca objectives: understand the taxonomic relationships and major features of mollusks learn the external and internal anatomy of the clam and squid understand the major advantages and limitations of the exoskeletons of mollusks in relation to the hydrostatic skeletons of worms and the endoskeletons of.