Web44 Molluscs. The phylum Mollusca is defined by several special characteristics. These defining characteristics include a mantle with a mantle cavity, a shell (except where lost), visceral mass, foot, and radula.The odontophore is in the mouth of most mollusks and it supports the radula (a ribbon of teeth). In many molluscs, it moves forward while the … Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks . Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. … Meer weergeven The words mollusc and mollusk are both derived from the French mollusque, which originated from the Latin molluscus, from mollis, soft. Molluscus was itself an adaptation of Aristotle's τὰ μαλάκια ta malákia (the … Meer weergeven Because of the great range of anatomical diversity among molluscs, many textbooks start the subject of molluscan anatomy by describing … Meer weergeven Feeding Most molluscs are herbivorous, grazing on algae or filter feeders. For those grazing, two feeding strategies are predominant. Some feed on microscopic, filamentous algae, often using their radula as a 'rake' to comb up … Meer weergeven Fossil record Good evidence exists for the appearance of gastropods (e.g., Aldanella), cephalopods (e.g., Meer weergeven The most universal features of the body structure of molluscs are a mantle with a significant cavity used for breathing and excretion, and the organization of the nervous … Meer weergeven Estimates of accepted described living species of molluscs vary from 50,000 to a maximum of 120,000 species. The total number of described species is difficult to estimate … Meer weergeven Opinions vary about the number of classes of molluscs; for example, the table below shows seven living classes, and two extinct ones. Although they are unlikely to form a clade, some older works combine the Caudofoveata and Solenogasters into one class, the Meer weergeven
(PDF) Molluscs - ResearchGate
WebThe meaning of MOLLUSK is any of a large phylum (Mollusca) of invertebrate animals (such as snails, clams, or squids) with a soft unsegmented body usually enclosed in a … Web5 mrt. 2024 · Most mollusks have tentacles for feeding and sensing, and many have a muscular foot. Mollusks also have a coelom, a complete digestive system, and … goodlife knox
Phylum Mollusca - Characteristics, Classification, Examples and FAQs
WebHey kids!Today we will be learning about Mollusks!Invertebrates phylum mollusca. Categories of mollusks - Gastropods, Cephalopods and Bivalves.Invertebrates... WebMollusca, meaning “soft-bodied,” is one of the largest phylums in the animal kingdom. The word mollusc (or mollusk) derives from the Latin word “mollis,” which means “soft.”. … WebPhylum Mollusca is a very diverse (85,000 species) group of mostly marine species. Mollusks have a dramatic variety of form, ranging from large predatory squids and octopus, some of which show a high degree of … goodlife knox timetable