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Mollusks are a very diverse phylum. Some mollusks are nearly microscopic. The largest mollusk, a colossal squid, may be as long as a school bus and weigh over half a ton! The basic body plan of a mollusk is shown in Figure below. The main distinguishing feature is a hard outer shell. It covers the top of the body and encloses the internal organs. Phylum Mollusca, a group that contains creatures as varied as the fast-moving squid or the sedentary clams, cockles and mussels. The largest group, however, are the gastropods, animals originally with a single foot and a single coiled shell. Tokyo Rising Animal Farm Bestselling author Barbara Kingsolver returns with her first nonfiction narrativeHome Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos. Aschelminth, a name referring to an obsolete phylum of wormlike invertebrates, mostly of microscopic size. Previously, phylum Aschelminthes included seven diverse classes of animals: Nematoda (or Nemata), …Apr 14, 2023 · The scientific name of this clam is Tridacna gigas. The word Tridacna comes from the Greek word tridaknos meaning oyster, and the Latin word gigas means giant. It belongs to the Phylum Mollusk, the Class Bivalve, the Order Cardiida and the Family Cardiidae, subfamily Tridacninae. Included in this phylum are the snails, slugs, clams, chitons, squid and octopi. Class Gastropoda (Snails and Slugs). This is by far the largest class of ...Main tasks. Operate a fishing vessel to catch fish and other marine animals. Determine the fishing grounds and set and maintain course to reach them. Steer vessels using navigational instruments. Direct the fishing and monitor the crew's activities. Maintain the engine, fishing instruments, and on-board equipment.Class Bivalva. What class does a clam belong to? mantle. thin layer of tissue that covers a mollusk's internal organs, helps to form the shell. examples of mollusks. clams, oysters, scallops, mussels. bivalves. 2 shells. They are filter feeders, strain food from water using their gills.Phylum Mollusca, Class Bivalvia, Subclass Heterodonta, Order Myoida, Family Pholadidae. Shale-boring clam; siphon tips a circular disc 2-3 cm diameter usually flush with substrate, pale mottled tan; inhalant siphon larger with frill of tentacles around margin. Shell to 15 cm long, drills burrow to 30 cm deep. Geogr. Range: Bodega Bay to Baja ...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 ofClass Gastropoda are true snails and slugs (Fig. 3.51 B). They represent the most diverse class within phylum Mollusca with 60,000 to 80,000 extant species in marine, freshwater, and terrestrial habitats. Class Bivalvia are molluscs with hinged two-part shells (Fig. 3.51 C). Examples include clams, oysters, mussels, and scallops. 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 Other clams and mussels, scallops, oysters; Phylum: Mollusca; Class: Bivalvia. Natural history. At home on reefs throughout the Indian Ocean, the South ...Clam Taxonomy. Subclass Heterodonta – clam-like with large hinge teeth. Order Veneroidae. Family Veneridae. Venus or “heart” clam. Side view is cardioid (heart-shaped) 53 genera and about 500 species. Most are edible and support valuable fisheries and aquaculture industries wor ld w id e. Parapodia- Paired of unjointed appendages. function in locomotion, respiration, creation of water currents, living in tubes and anchoring. TYPICAL OF CASS POLYCHAETA (phylum annelida) Phylum Class. Annelida Polychaeta. -Tubeworms and sandworms. - Mostly marine. - Segments with parapodia. Phylum Class Common Name.

1. Contain a few specialized cells. 2. Asymmetrical. 3. Adults are SEssile. 4. Tiny pores all over body (ostia) 1.Sep 21, 2023 · Shellfish, any aquatic invertebrate animal having a shell and belonging to the phylum Mollusca, the class Crustacea (phylum Arthropoda), or the phylum Echinodermata. The term is often used for the edible species of the groups, especially those that are fished or raised commercially. Bivalve. Corbicula fluminea, commonly known as the Asian Freshwater Clam, has a relatively thick and large shell, compared to other freshwater bivalves. Corbicula spp., are native to Asia, including Indonesia and the Philippines and probably also to Africa and Australia. Several hermaphroditic genetic lineages of these clams have been introduced to ... Fish is a marine organism found in which class of classification? Why are animals like a snail, a clam, and a squid, which all look very different, considered to be in the same phylum? Both insects and roundworms exhibit ______, whereas sponges, snails, and leeches do not. A. molting during growth B. calcium carbonate shells C. sexual ...

Japanese littleneck (Manila) clams in British Columbia, Canada. In Alaska, an unidentified kidney coccidian (possibly multiple species) has been found in 12-33% of examined blue mussels, basket cockles and native littleneck clams. Also, varying prevalences of littleneck clams from all Alaskan locations (total prevalence ~ 62%)Jan 4, 2023 · The primary distinction between clams and snails is that clams have shells that can be opened and closed, whereas snails have shells that cannot be opened and closed. Clam Phylum And Class. Clams are a type of shellfish that belong to the phylum Mollusca and the class Bivalvia. There are over 15,000 species of clams, which are found in all ... …

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. clam, in general, any member of the invertebrate class Bivalvia—. Possible cause: Saxitoxin is a pyrrolopurine alkaloid and potent neurotoxin found in a v.