| Thracia pubescens | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Subclass: | Heterodonta |
| Order: | Anomalodesmata |
| Superfamily: | Thracioidea |
| Family: | Thraciidae |
| Genus: | Thracia |
| Species: | T. pubescens |
| Binomial name | |
| Thracia pubescens (Pulteney, 1799) | |
| Synonyms | |
| |
Thracia pubescens is a bivalve mollusc in the family Thraciidae. [1]
The ovate shell is oblong, transverse, equilateral, inequivalve and slightly inflated. it is of a reddish white color, covered with a browner shagreened epidermis, and marked with irregular and more or less numerous striae of increase. The beaks are short, and that of the right valve is notched at its summit to receive that of the left valve. The valves are pretty thick, rounded at the anterior, and truncated at the posterior side. The same side is separated from the upper surface by an obtuse angle, which arises from the posterior extremity of the beaks, and which descends obliquely as far as the lower extremity of the shell. The cardinal edge is rather thin, and destitute of teeth. It presents at the posterior side of the beaks an internal hollow, short and thick. The hollow is oblique and bounded outwardly by a little ridge, in which is inserted an external ligament, whilst another strong ligament is situated in the hollows of the valves. Interiorly they are white, smooth and polished. There exists upon the anterior side a muscular impression, long and very narrow in its middle, very near the edge. The posterior muscular impression is rounded and pretty large. [2]
Thracia pubescens is found in the North Atlantic Ocean, off Spain, the Azores and the Canary Islands and West Africa. It is distributed widely round the coasts of Britain and Ireland where it burrows in sandy or muddy substrates, extending its siphons to the surface to breathe and feed. It is also found in the Mediterranean Sea (Greece, Italy).
The ulna is a long bone found in the forearm that stretches from the elbow to the smallest finger, and when in anatomical position, is found on the medial side of the forearm. It runs parallel to the radius, the other long bone in the forearm. The ulna is usually slightly longer than the radius, but the radius is thicker. Therefore the radius is considered to be the larger of the two.
The humerus is a long bone in the arm that runs from the shoulder to the elbow. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes. The body is cylindrical in its upper portion, and more prismatic below. The lower extremity consists of 2 epicondyles, 2 processes, and 3 fossae. As well as its true anatomical neck, the constriction below the greater and lesser tubercles of the humerus is referred to as its surgical neck due to its tendency to fracture, thus often becoming the focus of surgeons.
The tibia, also known as the shinbone or shankbone, is the larger, stronger, and anterior (frontal) of the two bones in the leg below the knee in vertebrates, and it connects the knee with the ankle bones. The tibia is found on the medial side of the leg next to the fibula and closer to the median plane or centre-line. The tibia is connected to the fibula by the interosseous membrane of the leg, forming a type of fibrous joint called a syndesmosis with very little movement. The tibia is named for the flute tibia. It is the second largest bone in the human body next to the femur. The leg bones are the strongest long bones as they support the rest of the body.
The abdominal external oblique muscle is the largest and outermost of the three flat abdominal muscles of the lateral anterior abdomen.
The lower extremity of femur is the lower end of the femur in human and other animals, closer to the knee. It is larger than the upper extremity of femur, is somewhat cuboid in form, but its transverse diameter is greater than its antero-posterior; it consists of two oblong eminences known as the lateral condyle and medial condyle.
The wing of ilium is the large expanded portion which bounds the greater pelvis laterally. It presents for examination two surfaces—an external and an internal—a crest, and two borders—an anterior and a posterior.
Harpa, common name the "harp snails", is a genus of large predatory sea snails, marine gastropod mollusks in the family Harpidae.
Tonna is a genus of large sea snails, marine gastropod molluscs in the family Tonnidae, the tun or cask shells.
A bivalve shell is part of the body, the exoskeleton or shell, of a bivalve mollusk. In life, the shell of this class of mollusks is composed of two hinged parts or valves. Bivalves are very common in essentially all aquatic locales, including saltwater, brackish water, and freshwater. The shells of bivalves commonly wash up on beaches and along the edges of lakes, rivers, and streams. Bivalves by definition possess two shells or valves, a "right valve" and a "left valve", that are joined by a ligament. The two valves usually articulate with one another using structures known as "teeth" which are situated along the hinge line. In many bivalve shells, the two valves are symmetrical along the hinge line—when truly symmetrical, such an animal is said to be equivalved; if the valves vary from each other in size or shape, inequivalved. If symmetrical front-to-back, the valves are said to be equilateral, and are otherwise considered inequilateral.
Fabulina fabula, the bean-like tellin, is a species of marine bivalve mollusc in the family Tellinidae. It is found off the coasts of northwest Europe, where it lives buried in sandy sediments.
Tellimya ferruginosa is a species of small marine bivalve mollusc in the family Lasaeidae. It is found on the eastern side of the Atlantic Ocean.
Phaxas pellucidus, the transparent razor shell, is a species of marine bivalve mollusc in the family Pharidae. It is found buried in the seabed in coastal waters of northwest Europe, often in great numbers.
Thracia convexa is a bivalve mollusc in the family Thraciidae.
Mulinia lateralis, the dwarf surf clam or coot clam, is a species of small saltwater clam, a bivalve mollusc in the family Mactridae. It occurs in the western Atlantic Ocean and the Caribbean Sea.
A hinge ligament is a crucial 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 together by the ligament at the dorsal edge of the shell. The ligament is made of a strong, flexible and elastic, fibrous, proteinaceous material which is usually pale brown, dark brown or black in color.
Thracia is a genus of bivalve mollusc in the family Thraciidae.
Thracia corbuloidea is a bivalve mollusc in the family Thraciidae.
Cyathodonta plicata is a bivalve mollusc in the family Thraciidae.
Thracia phaseolina is a bivalve mollusc in the family Thraciidae.
Fusconaia burkei is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.