WebApr 18, 2024 · The bivalves (meaning "two-shells") are perhaps the most well known mollusks simply because of their history as a source of food. Clams, mussels, oysters and scallops are all bivalves. There are about 15,000 known species of bivalve, with about 80% of them being marine (the rest are found in fresh water). ... Cephalopods also have a … WebA bivalve whose two shells are of equal size. Inequivalved. A bivalve whose two shells are of unequal size. Articulated. Valves that are still joined together. ... Protrusions near the umbo of some bivalve that help direct water for 'swimming' Monomyarian. A term to describe bivalves with a single adductor muscle. Sets found in the same folder.
Shell Structures Marine Bivalve Shells of the British Isles
WebJan 1, 2024 · The bivalve shell (Mollusca: Bivalvia) exemplifies a homologous structure with few universally homologous points—only one can be identified across the Class, the shell ‘beak’. Here, we develop an axis-based framework, grounded in the homology of shell features, to orient shells for landmark-based, comparative morphology. WebThe bivalve shell (Mollusca: Bivalvia) exemplifies a homologous structure with few universally homologous points—only one can be identified across the Class, the shell ‘beak’. Here, we develop an axis-based framework, grounded in the homology of shell features, to orient shells for landmark-based, comparative morphology. five letter word starting with who
Bivalve shell - Wikipedia
WebThe knob-like, sometimes-pointed (and earliest-formed) part of a valve is the umbo (or “beak”, pl. umbones). Some of the external shell features of the bivalve Mercenaria mercenaria, including the valves, commissure, and umbones. Specimen is from the … WebMarks the point of first growth. Umbo. Where muscles were attached to the shell. These contract to keep shell closed. Adductor muscle scars. Permanent space between valves and allows the protrusion of siphons. Gape. When these are very pronounced, is used as a palaeoenvironmental indicator or a turbulent environment. WebA bivalve whose two shells are of equal size. Inequivalved. A bivalve whose two shells are of unequal size. Articulated. Valves that are still joined together. ... Protrusions near the umbo of some bivalve that help direct water for 'swimming' Monomyarian. A term to … can i roll over an inherited ira