Wiki User Answered . Live Game Live. This quiz is incomplete! Cephalopoda is the most morphologically and behaviorally complex class in phylum Mollusca. Class Cephalopoda. Aug 15, 2014 - Cuttlefish are marine animals of the order Sepiida. Mollusks are herbivores, carnivores, filter feeders, detritovores, or parasites. The class is made up of the snails, which have a shell into which the animal can withdraw, and the slugs, which are snails whose shells have … 1 Clams belong to the Class Bivalvia . Gastropoda 2. Cephalopods include shelled and reduced-shell groups. What class do Mollusk belong to? The Cephalopoda are named such because they have a prominent head that bears long flexible feet. Despite their name, cuttlefish are not fish but mollusks. Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda.The members are known as molluscs or mollusks (/ ˈ m ɒ l ə s k /).Around 85,000 extant species of molluscs are recognized. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives. Cephalopoda means "head foot" and this group has the most complex brain of any invertebrate. Mollusks. Mollusks Class Cephalopoda DRAFT. … Mollusks definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. 12 minutes ago. 6. Cephalopod definition, any mollusk of the class Cephalopoda, having tentacles attached to the head, including the cuttlefish, squid, and octopus. The most common mollusk belongs to the class gastropod. Many mollusks feed with a radula, to which hundreds of tiny teeth are attached. They have large W shaped eyes, eight arms and two tentacles furnished with suckers, with which they secure their prey. These classes are distinguished by, among other criteria, the presence and types of shells they possess. The arms, tentacles, and funnel are all derivatives of the foot. All animals in this class are carnivorous predators and have beak-like jaws at the anterior end. It shares this phylum with its brethren squid and mollusks. Question: To Which Phylum Do Animals In Seashells Belong To? The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn. Answer. They include some of the most intelligent creatures on the planet. Top Answer. They display vivid coloration, typically seen in squids and octopuses, which is used for camouflage. Edit. Class Aplacophora includes worm-like animals with no shell and a rudimentary body structure. These are ancient species that are found in all of the world's oceans, and are thought to have originated about 500 million years ago. Edit. pod (sĕf′ə-lə-pŏd′) n. Any of various carnivorous marine mollusks of the class Cephalopoda, having a large head, a mouth with a chitinous beak surrounded by arms or tentacles, and in most species, an ink sac containing a dark fluid used for defense, and including the octopuses, squids, cuttlefishes, and nautiluses. 4. The shell of these creatures is often what is recovered in a fossil dig. Gastropod, any member of more than 65,000 animal species belonging to the class Gastropoda, the largest group in the phylum Mollusca. Answer Selected Answer: a. Practice. Homework. Class Cephalopoda (Upper Cambrian to Recent) Cephalopods have a head with eyes. “Cephalopoda is a class of mollusks, the highest in organization of the division of the animal kingdom. Print; Share; Edit; Delete; Host a game. Pelecypoda (Bivalves) 3. They are also the most advanced class of the mollusks. The largest number of species of mollusks are in the class Gastropoda, which includes snails with a coiled shell, and others lacking a shell. Mollusks are a Phylum Mollusca. The main examples of this kind of mollusks include slugs and snails. They eat small mollusks including other cuttlefish, crabs, shrimp, and fish. Cephalopoda … 0. Despite their name, cuttlefish are not fish but mollusks. This quiz is incomplete! Mollusks can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. 0. 0% average accuracy. Cuttlefish are marine animals that belong to the class Cephalopoda. … Bivalves, like clams and oysters, are filter feeders and use a siphon to move water into the body. The octopus belongs to the phylum, Mollusca. 5. Finally, the fourth class of mollusks is the one known as Cephalopoda. Despite their name, cuttlefish are not fish but mollusks. Finish Editing. All mollusks reproduce sexually. Some mollusks, like tusk shells and bivalves, possess clusters of neurons (called ganglions) rather than true brains, while the brains of more advanced mollusks like cephalopods and gastropods are wrapped around their esophagi rather than isolated in hard skulls. Class Cephalopoda The Class Cephalopoda includes mollusks that are active marine predators such as octopus, squid, and chambered nautilus. Delete Quiz. This class contains the cephalopods cephalopod, member of the class Cephalopoda, the most highly organized group of mollusks (phylum Mollusca), and including the squids, octopuses, cuttlefish, and nautiluses. It is a cephalopod, the octopus; therefore, Cephalopoda would be its class. 2 Squids belong to the Class Cephalopoda. To this class belong the Nautili, Squids, Cuttle-fish, etc. by enloescience. Cephalopods are mollusks (Cephalopoda), a class which includes octopuses, squid, cuttlefish, and nautilus. To play this quiz, please finish editing it. These mollusks have a distinct head and, usually, at least one pair of tentacles (sometimes two pairs). The next largest group are the bivalves (class Bivalvia), the chitons (class Amphineura), and octopus and squid, (class Cephalopoda). 2014-11-23 04:14:46 2014-11-23 04:14:46. Cuttlefish are marine animals that belong to the class Cephalopoda. Solo Practice. Gills of clams collect food as well as O2 . Play. They belong to the class Cephalopoda, which also includes squid, octopuses, and nautiluses. These highly intelligent mollusks have prominent eyes remarkably similar in structure to those of vertebrates. (by Prefixes, Suffixes, Root Words) 1. The classes Gastropoda Bivalvia and Cephalopoda belong to the phylum Mollusca from BIOLOGY 101A at City College of San Francisco Reproduction/Life Cycle. Apr 17, 2012 - Cuttlefish recognise prey before they have hatched, the first known embryos to show such an ability. Which of the following mollusks belong to the class Gastropoda. The class Cephalopoda (“head foot” animals) includes octopuses, squids, cuttlefish, and nautilus. Class Cephalopoda (“head foot” animals), include octopi, squids, cuttlefish, and nautilus. Like squid, octopus, and nautiluses, they belong to the Cephalopoda class. The Class Gastropoda includes the groups pertaining to snails and slugs. Cuttlefish have a unique internal shell, the cuttlebone. Their foot is characterized by being long and flat. On the right is the relatively common The number of fossil species is estimated between 60,000 and 100,000 additional species. They display vivid coloration, typically seen in squids and octopi, which is used for camouflage. What Do Each Of These Classes Of Mollusks Means? Cuttlefish have an internal shell, called the cuttlebone. The only cephalopods you are likely to see in the rocky intertidal zone are octopi. The intrusion of a foreign object between the mantle and shell surfaces cause certain Bivalvia (Pelecypods) to form pearls . The proportion of undescribed species is very high. Cephalopods are characterized by a completely merged head and foot, with a ring of arms and/or tentacles surrounding the head. Cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. Recent studies indicate that cuttlefish are among the most intelligent invertebrates, with one of the largest brain-to-body size ratios of all invertebrates. Recent studies indicate that cuttlefish are among the most intelligent invertebrates, with one of the largest brain-to-body size ratios of all invertebrates. Their shells are chambered and may be straight or spiral. See more. Question 6 5 out of 5 points The classes Gastropoda, Bivalvia, and Cephalopoda belong to the phylum Mollusca. 6th - 12th grade . Played 0 times. The Cephalopoda receive their name from having organs of prehension and locomotion attached to the head, an arrangement toward which a gradual approach may be traced in the highest gasteropod mollusks. Asked by Wiki User. 3 The scars in the clam shell are from muscles. Gastropods are by far the largest class of molluscs, comprising over 80% of all molluscs. Even more weirdly, most of the neurons of an octopus are located not in its brains, but in its arms, which can function … Look it up now! Save. 0 1 2. Share practice link. The Cephalopoda Squids, octopuses, nautilus, and ammonites No. Learn more about cephalopods in this article. Cephalopods are a class of shell-bearing animals as well as mollusks with a reduced shell. Many, like octopus and squid have sharp jaws. This class includes the extinct ammonites and nautiloids. Some have no shell, such as the nautilus, squids, and octopi. Squids, octopuses, nautilus, and chambered nautilus are not fish but mollusks with they... 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