Bivalves have bilaterally symmetrical and laterally flattened bodies, with a blade-shaped foot, vestigial head and no radula. [9][10] At the dorsal or back region of the shell is the hinge point or line, which contain the umbo and beak and the lower, curved margin is …

Bivalve Anatomy. The valve structure and soft anatomy of bivalves varies among species. The modern hard-shelled clam (also known as the quahog or cherrystone), Mercenaria mercenaria (family Veneridae), is used here as an example of a typical bivalve.

Aug 26, 2020 · Bivalves are aquatic molluscs that possess two shells that are connected by a hinge. The two shells are commonly referred to as valves. These valves can be equal or unequal. Many, but not all, bivalves are bilaterally symmetrical. Bivalves possess no head but they do possess a large muscular foot that can often extend between the two valves.

Jan 5, 2023 · Different bivalves live in fresh, brackish, and marine water. Generalized diagram of a living bivalve. Not all bivalves have a foot or large siphons. Content and graphics by Stephen Greb, Kentucky Geological Survey.

Bivalve molluscs are completely enclosed by a shell made of two valves hinged at the top. A hinge ligament made of elastic protein joins the two halves of the shell together, and large adductor muscles between the two valves hold them closed.

Diagram of parts of the bivalve shell and glossary of terms. Use the text links below to see relevant diagrams. ADDUCTOR MUSCLE. Muscle connecting the two valves of the shell and tending to draw them together. There are normally two adductor muscles in each animal. ADDUCTOR MUSCLE SCAR.

Bivalve Anatomy The valve structure and soft anatomy of the bivalves varies among species. The Hard-Shelled Clam or Cherrystone, Mercenaria mercenaria, is used here as an example of a typical bivalve. Important features of bivalve shells are: two shelly valves

Download scientific diagram | 4 Internal anatomy of a typical heterodont bivalve. In this diagram, the left valve and mantle lobe are removed. The siphons in this specimen are long and fused.

Traditional bulk stable isotope (δ18O and δ13C) and clumped isotope (Δ47) records from bivalve shells provide invaluable histories of Earth's local and global climate change.

Bivalvia is the second most speciose class in the phylum Mollusca. Bivalves are distinctive within the Mollusca in that they are almost always completely enclosed within their shells.