The beak is part of the shell of a bivalve mollusk, i.e. part of the shell of a saltwater or freshwater clam. The beak is the basal projection of the oldest...

Bivalvia (/baɪˈvælviə/) or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of aquatic molluscs (marine...

refer to: Beak (bivalve), the oldest point on a bivalve mollusc's shell Beak (botany), a pointed projection on various plant parts Cephalopod beak, an 'inkfish'...

highest part of each valve of the shell of a bivalve or univalve mollusc. It usually contains the valve's beak, the oldest point of the valve, and its degree...

A bivalve shell is the enveloping exoskeleton or shell of a bivalve mollusc, composed of two hinged halves or valves. The two half-shells, called the...

part of the anatomical structure of a bivalve shell, i.e. the shell of a bivalve mollusk. The shell of a bivalve has two valves and these are joined by...

the protoconch. The apex of a valve of a bivalve shell is the area around what is most commonly the umbo or beak. In some species the embryonic shell or...

these octopuses mate with their ventral sides touching, pressing their beaks and suckers together in an intimate embrace. The LPSO has presented many...

case in almost all bivalves, a series of lines and/or growth rings originates at the center of the hinge, at a spot called the "beak" surrounded by a generally...

(US), and American piddock (UK), is a species of saltwater clam, a marine bivalve mollusk in the family Veneridae, the Venus clams. Petricolaria pholadiformis...

found in the exterior surface of the shells of some species of clams, bivalve mollusks, as for example in the family Veneridae and in the genus Ascetoaxinus...

Cyrtopleura costata, or the angel wing clam, is a bivalve mollusc in the family Pholadidae. It is found in shallow parts of the northwest Atlantic and...

islands and feed on marine invertebrates. The large, heavy beak is used to pry open bivalve mollusks. Although they are called oystercatchers, no record...

with a rounded end that is divided into two hinged parts, somewhat like the beak of a duck. This speculum is inserted into the vagina to dilate it for examination...

Pied oystercatchers frequent sandy coastlines, where they feed mainly on bivalve molluscs, which are prised apart with their specially adapted bill. These...

bittersweet (Glycymeris glycymeris) is a species of marine clam, a coastal bivalve mollusc of European waters. Despite its common name, it is not closely...

grandis, the giant floater, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is fast-growing...

the wavy-rayed lampmussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. The wavy-rayed lampmussel...

or honeycomb oysters. These bivalves were cemented by the more cupped left valve. The right valve is flatter, and the beak is curved to one side. Exogyra...

Thracia is a genus of bivalve mollusc in the family Thraciidae. The name is dated by Sherborn from Sowerby's "Mineral conchology of Great Britain" (1823:...

hanging bowls (in malacology) a depressed area, present in some bivalves behind the beaks in the dorsal line (about and behind the ligament, if external)...

Venerupis corrugata, the pullet carpet shell, is a species of bivalve mollusc in the family Veneridae. It is found buried in the sediment on the sea bed...

Emiliodonta is an extinct genus of bivalve in the extinct family Praenuculidae. The genus is one of three genera in the subfamily Concavodontinae. Emiliodonta...

carnivorous animal that specialises in feeding on molluscs such as gastropods, bivalves, brachiopods and cephalopods. Known molluscivores include numerous predatory...

Pholadidae, known as piddocks or angelwings, are a family of bivalve molluscs similar to a clam. Piddocks are unique in that each side of their shells...

Chamelea striatula, the striped venus clam, is a marine bivalve mollusc of the family Veneridae which inhabits the northern shores of Europe. The valves...

Asian green mussel, is an economically important species of mussel, a bivalve belonging to the family Mytilidae, or the "true mussels". It is harvested...

Thracia corbuloidea is a bivalve mollusc in the family Thraciidae. The name was introduced in Blainville's "Manuel de Malacologie et de Conchyliologie"...

found in only the southern reaches of the seaway. Inoceramids (oyster-like bivalve molluscs) were well-adapted to life in the oxygen-poor bottom mud of the...

point, a superficial resemblance to many (phylogenetically unrelated) bivalve mollusk shells. The loss of the hinge line was an important evolutionary...