Mollusca - Wikipedia
WEBMollusca is the second-largest phylum of invertebrate animals, after Arthropoda; members are known as molluscs or mollusks [a] ( / ˈmɒləsks / ). Around 76,000 extant species of molluscs are recognized. [3] . The number of fossil species is estimated between 60,000 and 100,000 additional species. [4] .
Mollusk | Definition, Characteristics, Shell, Classification, & Facts
WEBMollusk, any soft-bodied invertebrate of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body. Along with the insects and vertebrates, it is one of the most diverse groups in the animal kingdom, with nearly 100,000 (possibly.
Mollusk Facts: Habitat, Behavior, Diet - ThoughtCo
WEBDec 13, 2019 · Size: Microscopic to 45 feet in length. Weight: Up to 1,650 pounds. Lifespan: Hours to centuries—the oldest is known to have lived over 500 years. Diet: Mostly herbivore, except for cephalopods who are omnivores. Habitat: Terrestrial and aquatic habitats on every continent and ocean in the world.
Phylum Mollusca | Biology for Majors II - Lumen Learning
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 intelligence, to grazing forms with elaborately sculpted and colored shells.
Classification and economic importance of mollusks | Britannica
WEBmollusk, or mollusc, Any of some 75,000 species of soft-bodied invertebrate animals (phylum Mollusca), many of which are wholly or partly enclosed in a calcium carbonate shell secreted by the mantle, a soft covering formed from the body wall. Between the mantle and the body is the mantle cavity.
5.5: Phylum Mollusca - Biology LibreTexts
WEBAug 24, 2022 · Mollusca can be found in freshwater, marine and terrestrial habitats. More features of molluscs include bilateral symmetry, soft or unsegmented bodies, respiration via ctenidium , ganglia/nerve comprised nervous system , haemocoel body cavity, etc. [1].
Gastropod | Definition, Examples, & Facts | Britannica
WEBMar 12, 2024 · class of mollusks. Also known as: Gastropoda. Written by. G. Alan Solem. Curator of Invertebrates, Field Museum of Natural History, Chicago, 1959– 90. Author of The Shell Makers and others. G. Alan Solem. Fact-checked by. The Editors of Encyclopaedia Britannica.
The mollusca - University of California Museum of Paleontology
WEBA cuttlefish, a coleoid cephalopod, moves primarily by undulating its body fins. 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.
Molluscs | Oxford University Museum of Natural History
WEBMOLLUSCS. Mollusca is the group of animals that includes gastropods (snails, slugs, limpets etc), bivalves (clams, oysters, mussels etc), cephalopods (octopuses, nautiluses, squids etc), scaphopods (tusk shells), caudofoveates, solenogastres, monoplacophorans and polyplacophorans (chitons).
28.3E: Phylum Mollusca - Biology LibreTexts
WEBOct 31, 2023 · 28.3E: Phylum Mollusca. Page ID. Boundless. Mollusks have a soft body and share several characteristics, including a muscular foot, a visceral mass of internal organs, and a mantle. Learning Objectives. Describe the unique anatomical and morphological features of molluscs. Key Points.
Skip to content