Clam phylum

Animal Diversity Figure 32.4 A traditional view of animal diversity based on body-plan grades Figure 32.8 Animal phylogeny based on sequencing of SSU-rRNA Figure 32.5 Body symmetry Figure 32.13x Burgess Shale fossils Figure 32.13 A sample of some of the animals that evolved during the Cambrian explosion Figure 33.1 Review of animal …

Members of the phylum Mollusca are soft-bodied animals, such as the snail, clam, squid, oyster, and octopus. Generally, these animals live in water. Some secrete a hard shell. Each mollusk has a muscular organ called a foot that is used for gripping or creeping over surfaces. The animal has a head with a mouth; a brain or a sense organ; and ...Animals, such as mussels and clams (phylum Mollusca), have developed behavioral adaptations that expend a lot of energy to function in this rapidly changing environment. When these animals are exposed to low salinity, they stop feeding, close their shells, and switch from aerobic respiration (in which they use gills) to anaerobic respiration (a ...92 cm thick) composed of clams, fine silt, and mucus. Individuals become so dominant that they have the capacity to change their environment radically. In the Columbia River system, they live in stream bottoms. Prolonged exposure to air can cause death by accumulation of metabolic wastes (rather than desiccation as the clam shell can close ...Phylum Porifera: Scientific Name : Common Name: Axinella polycapella : orange devil's finger: Chondrilla sp. chicken liver sponge: Cinachyra allocladia : yellow ball sponge: Cliona celata : yellow boring sponge: Dysidea camera : bluish-purple sponge: Halichondira bowerbamki : crumb-of-bread sponge: Lissodendoryx isodictyalid : garlic sponge ... Clam Dissection. The phylum Mollusca includes snails, clams, chitons, slugs, limpets, octopi, and squid. As mollusks develop from a fertilized egg to an adult, most pass through a larval stage called the trocophore. The trocophore is a ciliated, free-swimming stage. Mollusks also have a radula or file-like organ for feeding, a mantle that may ...It surrounds and protects the clam's heart. What is the function of the heart? To send "blood" (water taken in) through open vessels into open areas within the visceral mass. Study with Quizlet and memorize flashcards containing terms like What phylum do clams belong to?, What does the visceral mass contain?, Why are clams considered bi-valved ...

Clams, Snails, and Squid: Phylum Mollusca, Class Gastropoda Gastropods is the group of molluscs that includes the snails. Many types secrete a single coiled or uncoiled shell for protection, and these shells may be found as fossils. Some species spend their lives crawling along the sea floor, eating algae or debris from rocks and bottom sediments.92 cm thick) composed of clams, fine silt, and mucus. Individuals become so dominant that they have the capacity to change their environment radically. In the Columbia River system, they live in stream bottoms. Prolonged exposure to air can cause death by accumulation of metabolic wastes (rather than desiccation as the clam shell can close ...15820 Afr. J. Biotechnol. Table 1. Means of physical and chemical characteristics of smoked skipjack tuna produced in Kendari city. ParameterMembers of the phylum Mollusca are soft-bodied animals, such as the snail, clam, squid, oyster, and octopus. Generally, these animals live in water. Some secrete a hard shell. Each mollusk has a muscular organ called a foot that is used for gripping or creeping over surfaces. The animal has a head with a mouth; a brain or a sense organ; and ...Bivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves. The valves are connected to one another at a hinge. Primitive bivalvesSiphon (mollusc) A specimen of a venerid bivalve. The adductor muscles have been cut, the valves are gaping. The internal anatomy is visible, including the paired siphons to the right. The siphon of a large carnivorous marine volute, Cymbiola magnifica. A siphon is an anatomical structure which is part of the body of aquatic molluscs in three ...

Phylum Mollusca is the predominant phylum in marine environments. It is estimated that 23 percent of all known marine species are mollusks; there are over 75,000 described species, making them the second most diverse phylum of animals. The name “mollusca” signifies a soft body, since the earliest descriptions of mollusks came from ...Razor clam, any of the species of marine bivalve mollusks of the family Solenidae. In England the species of the genera Ensis and Solen are called razor shells. The Solenidae are common in intertidal sands and muds, particularly of temperate seas. These bivalves have narrow and elongated razorlike. Clams, Snails, and Squid: Phylum Mollusca, Class Gastropoda. Gastropods is the group of molluscs that includes the snails. Many types secrete a single coiled or uncoiled shell for protection, and these shells …The clam's history with introduction into England has shown that deliberate introduction of a species has the capability of working commercially (Mercenaria mercenaria 2000). The Algonquin tribes would grind up the shells and make beaded necklaces that would be used as wampumpeag or wampum, which means money (Grzimek's 1974). ...Bivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves. The valves are connected to one another at a hinge. Primitive bivalvesMollusks are invertebrates and include octopus, squid, snails, slugs, clams, and oysters and many others. As diverse as this phylum is, all its animals include three physical traits. They have what is referred to as the visceral mass, mantle and foot. The Mollusk visceral mass includes body organs – the digestive tract, renal and reproductive ...

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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. It is sold in the aquarium trade as. “pygmy clam”, or “golden clam.” Phylum: Molluska ... Pisidium spp. (pea clams). Phylum: Molluska. Class: Bivalvia. Sub class ...Cool facts. As its name implies, the giant clam is the world’s largest living marine bivalve (clam, mussel or oyster). Their soft bodies account for only about 10 percent of their total weight. Once a giant clam settles into a place and begins to grow, it stays permanently attached to that spot for life. A giant clam can live 100 years or more!Animals, such as mussels and clams (phylum Mollusca), have developed behavioral adaptations that expend a lot of energy to function in this rapidly changing environment. When these animals are exposed to low salinity, they stop feeding, close their shells, and switch from aerobic respiration (in which they use gills) to anaerobic …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 ... The Veneridae or venerids, common name: Venus clams, are a very large family of minute to large, saltwater clams, marine bivalve molluscs. Over 500 living species of venerid bivalves are known, most of which are edible, and many of which are exploited as food sources. Many of the most important edible species are commonly known (in the USA ...

Sep 23, 2021 · The name of the phylum is derived from the Latin word annellus, which means a small ring. Approximately 16,500 species have been described. The phylum includes earthworms, polychaete worms, and leeches. Like mollusks, annelids exhibit protostomic development. Annelids are bilaterally symmetrical and have a worm-like appearance. Scientific classification of clams: Kingdom: Animalia, Phylum: Mollusca, Class: Bivalvia. What is the genus of clams? There are several different orders, families, geniuses, and species of clams.Lajonkairia lajonkairii is an edible species of saltwater clam in the family Veneridae, the Venus clams.. Common names for the species include Manila clam, Japanese littleneck clam, Japanese cockle, Japanese carpet shell., and Bajirak(name called by koreans). This clam is commercially harvested, being the second most important bivalve grown in …23% of all named marine organisms. Representatives of the phylum live in a huge range of habitats including marine, freshwater, and terrestrial environments. Molluscs are a highly …19 mar. 2021 ... Clams, oysters, mussels and scallops are all mollusks, meaning they are members of the invertebrate phylum Mollusca. Their cousins within the ...Chris Maciejeweski '95 and Rich Swallow '95 collect data for their project on giant clams. Phylum: Echinodermata Class: Asteroidea Species: Linckia laevigata. Among the most conspicuous invertebrates on the reef are the echinoderms (from the Greek for "spiny skin") such as the starfish (or sea stars) and the sea urchins.19 mar. 2021 ... Clams, oysters, mussels and scallops are all mollusks, meaning they are members of the invertebrate phylum Mollusca. Their cousins within the ...Phylum Mollusca Class Gastropoda. snails, slugs have one or no shell Phylum Mollusca Class Bivalvia. two hinged shell, oysters, scallops, clams.Phylum Mollusca is a very diverse (85,000 species ) group of mostly marine species, with a dramatic variety of form. This phylum can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. ... Bivalves include clams, oysters, mussels, scallops, and numerous other families ...Ninety head day old chick (DOC) of local village chicken was used in this experiment to evaluate the effect of agricultural by product-based feed supplemented with herbal probiotics (HP) and mud clams extract (MC) on production performance of local village chicken. A completely randomized design was used with 5 treatments and 4 replications.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 ... Phylum: Mollusca contains some of the most well-known invertebrates including snails, slugs, clams, mussels and octopuses all having the mantle, an ...

28 avr. 2021 ... The clam is part of the Phylum Mollusca. They are specifcially though part of the Bivalvia class, which have a two valave shell held ...

15820 Afr. J. Biotechnol. Table 1. Means of physical and chemical characteristics of smoked skipjack tuna produced in Kendari city. ParameterGiant clams are members of the Subfamily Tridacninae, which consists of two genera: Hippopus and Tridacna. Currently, seven giant clam species are candidate species for listing under the Endangered Species Act. This includes two species in the genus Hippopus ( H. hippopus and H. porcellanus) and five species in the genus Tridacna ( T. derasa, T ...Polychaeta(Clam, sand, and tubeworms) Phylum AnnelidaClass PolychaetaNumber of families 86Thumbnail description Segmented worms with numerous bristles and one pair of parapodia per segment Source for information on Polychaeta (Clam, Sand, and Tubeworms): Grzimek's Animal Life Encyclopedia dictionary.The Veneridae or venerids, common name: Venus clams, are a very large family of minute to large, saltwater clams, marine bivalve molluscs. Over 500 living species of venerid bivalves are known, most of which are edible, and many of which are exploited as food sources. Many of the most important edible species are commonly known (in the USA ...Longest dimension is approximately 12.5 cm. Brachiopod: Lingula anatina (PRI 76882) by Digital Atlas of Ancient Life on Sketchfab. Recent specimen of the brachiopod Lingula anatina from the Phillipines (PRI 76882). Specimen is from the collections of the Paleontological Research Institution, Ithaca, New York.Chris Maciejeweski '95 and Rich Swallow '95 collect data for their project on giant clams. Phylum: Echinodermata Class: Asteroidea Species: Linckia laevigata. Among the most conspicuous invertebrates on the reef are the echinoderms (from the Greek for "spiny skin") such as the starfish (or sea stars) and the sea urchins.Members of the phylum Mollusca are soft-bodied animals, such as the snail, clam, squid, oyster, and octopus. Generally, these animals live in water. Some secrete a hard shell. Each mollusk has a muscular organ called a foot that is used for gripping or creeping over surfaces. The animal has a head with a mouth; a brain or a sense organ; and ...The flat razor clam Phylum: Mollusca Class: Bivalvia, Heterodonta, Euheterodonta Order: Imparidentia, Adapedonta Family: Solenoidea, Pharidae, Siliquinae surround a mantle, head, foot and viscera (see Plate 393B, Coan and Valentich-Scott 2007). Solenid and pharid bivalves are bur-rowers and some species are quite fast (e.g.,

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The term shellfish includes members of the mollusk phylum and the crustacean subphylum. Crustaceans include lobsters, crabs and shrimp. Crustaceans are really ...Dec 11, 2022 · A clam is a bivalve mollusc in the family Myidae. This group of molluscs also includes oysters, scallops, and mussels. Clams are soft-bodied invertebrates that live in both fresh and salt water. They have a two- part shell that is hinged at the midpoint. Clams are filter feeders and use their siphons to draw in water. Bivalves include clams, oysters, mussels, scallops, and numerous other families of shells. The majority are filter feeders and have no head or radula. The gills have evolved into …Phylum: Mollusca contains some of the most well-known invertebrates including snails, slugs, clams, mussels and octopuses all having the mantle, an ...The giant clams are the members of the clam genus Tridacna that are the largest living bivalve mollusks. There are actually several species of "giant clams" in the genus Tridacna, which are often misidentified for Tridacna …Jul 10, 2021 · Taxa of special interest were included in the dataset for these phyla (Fig. 8), including economically valuable and/or protected bony fish, sharks, and marine mammals (phylum Chordata); giant clams (phylum Mollusca); and echinoderms. Clams and their relatives (oysters, scallops, and mussels) are often called bivalves (or bivalved mollusks) because their shell is composed of two parts called valves. Bivalves have a long history. Their fossils first appear in rocks that date to the middle of the Cambrian Period, about 510 million years ago.Feb 22, 2023 · Clam shrimp are a popular food choice for migrating birds. Feeds are identical to those of Fairy Shrimp and Tadpole Shrimp. The species can grow to be 3/8 inch (10 mm) long, 1/4 inch (7 mm) wide, and 1/3 inch (5 mm) deep, and live for up to 12 weeks in best condition. A female clams shrimp can mate with only half of her male counterparts in her ... Jul 10, 2021 · Taxa of special interest were included in the dataset for these phyla (Fig. 8), including economically valuable and/or protected bony fish, sharks, and marine mammals (phylum Chordata); giant clams (phylum Mollusca); and echinoderms. The shells of freshwater clams particularly have been used for buttons. Pearls are secretions of the mantle around an irritant of calcium carbonate and are usually found in some oyster species. ----- Please see following plates for Example Structures of the Pelecypoda: Plate 47 = Phylum: Mollusca: Pelecypoda: Venus sp. ….

The term shellfish includes members of the mollusk phylum and the crustacean subphylum. Crustaceans include lobsters, crabs and shrimp. Crustaceans are really ...Pearls are formed when an irritant, such as a bit of food, a grain of sand, bacteria, or even a piece of the mollusk's mantle becomes trapped in the mollusk. To protect itself, the mollusk secretes the substances aragonite (a mineral) and conchiolin (a protein), which are the same substances it secretes to form its shell.Clam Dissection. The phylum Mollusca includes snails, clams, chitons, slugs, limpets, octopi, and squid. As mollusks develop from a fertilized egg to an adult, most pass through a larval stage called the trocophore. The trocophore is a ciliated, free-swimming stage. Mollusks also have a radula or file-like organ for feeding, a mantle that may ... A Clam Shrimp looks like a small clam. Two shells cover its body. Between the shells you can see two body sections below the head. The front section is the thorax and the back section is the abdomen. The Clam Shrimp has 14 pairs of appendages that look like legs. The appendages help the Clam Shrimp to swim, but they are mostly used for collecting …Clams and their relatives (oysters, scallops, and mussels) are often called bivalves (or bivalved mollusks) because their shell is composed of two parts called valves. Bivalves have a long history. Their fossils first appear in rocks that date to the middle of the Cambrian Period, about 510 million years ago.Description. Atlantic abra or nut clams can be very abundant in shallow sand flats. The plump shells are translucent white, smooth and glossy, and may be slightly iridescent. There is a very thin clear to yellowish covering (periostracum) on the shells. The Atlantic abra grows to only ¼ inches in length. These size of these animals ranges from 1/10 inch to over 70 feet in length. They can weigh anywhere from 3/100,000 of an ounce to more than 500 pounds. Clams, oysters, snails, chitons, octopi, and squid are all members of the Phylum Molluska. Many people know the mollusks of this area by the seashells they leave behind.Razor clam, any of the species of marine bivalve mollusks of the family Solenidae. In England the species of the genera Ensis and Solen are called razor shells. The Solenidae are common in intertidal sands and muds, particularly of temperate seas. These bivalves have narrow and elongated razorlike.Phylum: Mollusca -- clams, oysters, snails. Class: Pelecypoda (Bivalvia) ... -- As in the clam there is an epidermis and mixed muscle and connective tissue. Clam phylum, Clams; Classification: Oysters belong to the Mollusca phylum and have Pteriomorphia as their subclass. Clams belong to the Mollusca phylum and have Heterodonta as their subclass. Shell Structure: The shell of an oyster is rough and rich in calcium content. The shell of a clam is hard and lustrous. Preferred Residence: Oysters prefer brackish ..., Description. As the largest bivalve mollusc, the giant clam weighs a great average of 200kg. This unique species is found to be a wide variety of colours, created by a contrast between algae inside the clam and the clam’s natural pigment. This vibrancy is an indicator of clam health—if the clam is unhealthy, the dying algae will bleach it ..., It is sold in the aquarium trade as. “pygmy clam”, or “golden clam.” Phylum: Molluska ... Pisidium spp. (pea clams). Phylum: Molluska. Class: Bivalvia. Sub class ..., Bivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves. The valves are connected to one another at a hinge. Primitive bivalves, The giant clams are the members of the clam genus Tridacna that are the largest living bivalve mollusks. There are actually several species of "giant clams" in the genus Tridacna, which are often misidentified for Tridacna gigas, the most commonly intended species referred to as "the giant clam"., 28 avr. 2021 ... The clam is part of the Phylum Mollusca. They are specifcially though part of the Bivalvia class, which have a two valave shell held ..., 11 mai 2020 ... ... phylum Mollusca. There are many clams in the ocean, but some can also be found in some lakes, streams, and rivers. A clam's oval-shaped ..., 8 jui. 2022 ... Class Bivalvia consists of mollusks with two shells held together by a muscle; these include oysters, clams, and mussels. Members of class ..., Jan 25, 2021 · Characterization and phylogenetic analysis of the hard clam genome. a Genomic landscape of the hard clam. From outer to inner circles: a, the 19 chromosomes at the Mb scale; b, IAP gene number on each chromosome; c, chromosomal distribution of 159 IAPs, with outer and inner lines indicating sense and antisense strands, respectively. , Giant clams also have many pale or clear spots on the mantle, referred to as 'windows'. Giant clams cannot completely close their shell once fully grown. Other Physical Features; ectothermic; bilateral symmetry; Range mass 0 to 0 kg 0.00 to 0.00 lb; Average mass 200 kg 440.53 lb; Reproduction. Giant clams reproduce sexually via broadcast spawning., Phylum: Mollusca (Mollusks) Class: Polyplacophora (Chitons) Class: Gastropoda (snails) Class: Bivalvia (Clams) Class: Cephalopoda (Nautilus, Squid, Octopus) All mollusks have a visceral mass, a mantle, and a foot. The visceral mass contains the digestive, excretory, and reproductive organs. The mantle is a covering. It may secrete a shell., Mercenaria is a genus of edible saltwater clams, marine bivalve molluscs in the family Veneridae, the Venus clams. [1] The genus Mercenaria includes the quahogs, consisting of Mercenaria mercenaria, the northern quahog or hard clam, and M. campechiensis, the southern quahog. These two species commonly hybridise where their ranges overlap., In this study, we present an analysis of metagenome sequences obtained from a filtrate of a siphon tissue homogenate of otter clams (Lutraria rhynchaena) with swollen-siphon disease. The viral signal was mined from the metagenomic data, and a novel circular ssDNA virus was identified. Genomic features and phylogenetic analysis showed …, The phylum (plural, phyla) ranks below the kingdom and above the class in taxonomy. Scientists generally use the term phylum for archaea, bacteria ... and clams. Animals of the Phylum Chordata have an internal skeleton and a backbone or notochord (a primitive backbone). Fish, amphibians, reptiles, birds, and mammals (including humans) are in ..., Dec 11, 2022 · A clam is a bivalve mollusc in the family Myidae. This group of molluscs also includes oysters, scallops, and mussels. Clams are soft-bodied invertebrates that live in both fresh and salt water. They have a two- part shell that is hinged at the midpoint. Clams are filter feeders and use their siphons to draw in water. , Nemertini. Nemertinea. Rhynchocoela. Nemertea is a phylum of animals also known as ribbon worms or proboscis worms, consisting of 1300 known species. [2] [3] Most ribbon worms are very slim, usually only a few millimeters wide, although a few have relatively short but wide bodies. Many have patterns of yellow, orange, red and green coloration., Cedar Key, FL LNST@uf l.edu Taxonomy Kingdom: Animalia Phylum Mollusca Latin for “soft things” Largest and most diverse marine phylum 25% of named marine organisms About 100,000 recognized species Classes in Phylum Mollusca Gastropoda - snails C ep h a l opo d a – squ id s, oc t opus Polyplacophora - chitons, Clams, oysters, mussels and scallops are all mollusks, meaning they are members of the invertebrate phylum Mollusca. Their cousins within the phylum include gastropods, like snails and slugs, and cephalopods, like octopuses and squid. Of all the mollusks, gastropods are the largest group with more than 60,000 known species., Bivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves. The valves are connected to one another at a hinge. Primitive bivalves. , Bivalve mollusks (e.g., clams, oysters, mussels, scallops) have an external covering that is a two-part hinged shell that contains a soft-bodied invertebrate. A roughfile clam from the Flower Garden Bank National Marine Sanctuary—just one of many different bivalve mollusk species. Like fish, bivalve mollusks breathe through their gills. As ..., Sep 21, 2023 · Clam, in general, any member of the invertebrate class Bivalvia—mollusks with a bivalved shell (i.e., one with two separate sections). More than 15,000 living species of bivalves are known, of which about 500 live in fresh water; the others occur in all seas. , The shells of freshwater clams particularly have been used for buttons. Pearls are secretions of the mantle around an irritant of calcium carbonate and are usually found in some oyster species. ----- Please see following plates for Example Structures of the Pelecypoda: Plate 47 = Phylum: Mollusca: Pelecypoda: Venus sp., Nemertini. Nemertinea. Rhynchocoela. Nemertea is a phylum of animals also known as ribbon worms or proboscis worms, consisting of 1300 known species. [2] [3] Most ribbon worms are very slim, usually only a few millimeters wide, although a few have relatively short but wide bodies. Many have patterns of yellow, orange, red and green coloration., Phylum Mollusca is characterised by the pronounced development of musculature known as the foot. It is the locomotory organ in Molluscs. This organ is quite uncommon and strange to others. It is regarded as the remnant of the ‘dermo-muscular tube’ of the ancestral form whose ventral side became greatly developed as an adaptation for creep ..., Physiology. Mya arenaria has a calcium carbonate shell that is thin and easily broken, hence the name "soft-shells" (as opposed to its beach-dwelling neighbors in some regions, the thick-shelled quahog ). This clam is found living approximately 3–8 in (7.6–20.3 cm) under the surface of the mud. It extends its paired siphons up to the ..., Properties Of Clams. The clam is the shellfish with the lowest level of fat in its composition. It provides forty-seven calories per hundred grams of edible portion. This fact makes of them, an ideal food for weight loss diets. In addition they have a high content of minerals and vitamins., Clam, in general, any member of the invertebrate class Bivalvia—mollusks with a bivalved shell (i.e., one with two separate sections). More than 15,000 living species of bivalves are known, of which about 500 live in fresh water; the others occur in all seas. Bivalves usually live on or in sandy or, Clam Dissection. Introduction The phylum Mollusca includes snails, clams, chitons, slugs, limpets, octopi, and squid.As mollusks develop from a fertilized egg to an adult, most pass through a larval stage called the trocophore.The trocophore is a ciliated, free-swimming stage.Mollusks also have a radula or file-like organ for feeding, a mantle that may …, Clam, in general, any member of the invertebrate class Bivalvia—mollusks with a bivalved shell (i.e., one with two separate sections). More than 15,000 living species of bivalves are known, of which about 500 live in fresh water; the others occur in all seas. Bivalves usually live on or in sandy or, The hard clam (Mercenaria mercenaria), also known as the round clam, hard-shell (or hard-shelled) clam, or the quahog, is an edible marine bivalve mollusk that is native to the eastern shores of North America and Central America from Prince Edward Island to the Yucatán Peninsula.It is one of many unrelated edible bivalves that in the United States …, Clams, oysters, mussels and scallops are all mollusks, meaning they are members of the invertebrate phylum Mollusca. Their cousins within the phylum include gastropods, like snails and slugs, and cephalopods, like octopuses and squid. Of all the mollusks, gastropods are the largest group with more than 60,000 known species., 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 worldwide, Nereis worms are commonly known as rag worms or clam worms. The body is long, slender, and dorso-ventrally flattened, reaching a length of 5-30 cm. The head consists of two parts: a roughly triangular anterior lobe—the prostomium—and a posterior ring-like portion—the peristomium.