What is the difference between Gastropoda and Bivalvia?
Class Bivalvia consists of mollusks with two shells held together by a muscle; these include oysters, clams, and mussels. Members of class Gastropoda have an asymmetrical body plan and usually have a shell, which can be planospiral or conispiral.
Are gastropods and mollusks the same?
Snails and slugs, limpets, and sea hares Gastropods are one of the most diverse groups of animals, both in form, habit, and habitat. They are by far the largest group of molluscs, with more than 62,000 described living species, and they comprise about 80% of living molluscs.
How are bivalves cephalopods and gastropods different to one another?
bivalve: Class of mollusks that use their foot to attach themselves to rocks or to burrow into mud, i.e. clams. cephalopod: Class of mollusks characterized by a set of arms or tentacles; i.e. octopus. gastropod: Class of mollusks that use their foot to crawl, i.e. snails.
Do bivalves and gastropods have an outer shell?
The mantle and shell are laterally compressed in scaphopods and bivalves; in gastropods and cephalopods the head is free of the mantle and shell. In bivalves a dorsal hinge ligament joins two shell valves, which are further held together by two adductor muscles with attachment points on the inner aspect of each valve.
What do gastropods and cephalopods have in common?
Cephalopods and gastropods are two classes belonging to the phylum Mollusca of Kingdom Animalia. They have coiled shells. Both groups include aquatic animals. They are invertebrates.
What is the difference between bivalves and cephalopods?
bivalve: Class of mollusks that use their foot to attach themselves to rocks or to burrow into mud, i.e. clams. cephalopod: Class of mollusks characterized by a set of arms or tentacles; i.e. octopus.
Why are gastropods different from other molluscs?
Gastropods are generally asymmetrical although they evolved from a bilaterally symmetrical mollusk ancestor. The asymmetry of gastropods is achieved through a process called torsion that occurs as the animal is developing into adulthood.
Why are gastropods and cephalopods have in common?
What are the Similarities Between Cephalopods and Gastropods? Cephalopods and gastropods are two classes belonging to the phylum Mollusca of Kingdom Animalia. They have coiled shells. Both groups include aquatic animals.
What is the difference between a gastropod and a cephalopod?
Among the most obvious differences between gastropods and cephalopods are the habitats in which they live. Cephalopods are strictly marine creatures — they can only be found in the ocean. Gastropods, on the other hand, can live in a range of different environments.
Do bivalves have tentacles?
Bivalves do not have brains. Since they do not have a head region, their tentacles and eyes are often located along the mantle edge.
Do gastropods have an external shell?
The gastropod shell is an animal shell which is part of the body of a gastropod or snail. It is an external skeleton or exoskeleton, which serves not only for muscle attachment, but also for protection from predators and from mechanical damage.
How are gastropods similar to Ammonoids?
Most gastropod shells are coiled. This coiling may be in one plane, similar to the shells of coiled ammonoids. Other gastropod shells may be coiled in such a way as to produce spires of varying heights. The outer surface of the shells may be ornamented with ridges, grooves, bumps, spines, or other markings.
What is the difference between molluscs and gastropods?
Molluscs possess a soft body, which is divided in visceral mass and foot. Visceral mass remains covered by special skin called mantle, which is capable of secreting a shell. Gastropods and Bivalve belong to the same phylum, Mollusc, but different classes due to very striking differences.
Which of the following is a bivalve mollusk?
The mollusks that have a hinged, two-part shell joined by strong muscles are called bivalves. Clams, Oysters, and Scallops are bivalve mollusks and are a familiar food source.
What is the difference between aquatic and terrestrial gastropods?
Respiration: The aquatic gastropods have gills while in terrestrial gastropods the mantle cavity is converted into lungs. Example: garden snail and slug (shell lost). Symmetry: These animals are bilaterally symmetrical. Their body is laterally compressed and is enclosed in two pieces of shells.
What is the most specialized group of mollusks?
Bivalves The mollusks that have a hinged, two-part shell joined by strong muscles are called bivalves. This group are the the most specialized and complex group. The largest group of the mollusks are called the gastropods includes snails, conchs, abalones, whelks, sea slugs, and garden slugs.