| Annachlamys flabellata | |
|---|---|
 | |
| Two empty valves of Annachlamys flabellata | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Pectinida |
| Family: | Pectinidae |
| Genus: | Annachlamys |
| Species: | A. flabellata |
| Binomial name | |
| Annachlamys flabellata | |
| Synonyms [1] | |
| |
Annachlamys flabellata is a species of scallop, a marine bivalve mollusc in the family Pectinidae. It is found in the sublittoral zone of the continental shelf north of Australia. [1]
Annachlamys flabellata grows to between 6 centimetres (2.4 in) and 10 centimetres (3.9 in) in length. The shell is inequivalve and moderately compressed. The right valve is more inflated and less convex than the left. The general shape is circular with two broad auricles extending on either side of the umbones. These have a straight hinge line which is exactly in line with the umbones. There are 18 to 20 broad radial ribs which are more prominent and have larger interstices between them on the right valve. There is also sculpturing in the form of concentric growth rings. Some or all of the ribs on the left valve are pink, orange or mauve, while the colour of the right valve is entirely white. The space between the ribs is narrower than in the otherwise similar, closely related species, Annachlamys reevei . On the inside of the valve there is often a red tinge or a concentric ring of red dots. [2] [3]
Annachlamys flabellata is found on sandy seabeds in the neritic zone at depths of down to 127 metres (417 ft) on the coasts of the Australian states of Western Australia, Northern Territory, Queensland and New South Wales, in New Guinea and in Indonesia.
Annachlamys flabellata is found lying on sandy seabeds covered with a thin layer of substrate. [4] It is a filter feeder, drawing water into its gill chambers through a gap between the valves at the back of the shell. At the same time as oxygen is being absorbed by the gills, food particles, mostly microscopic algae, are sieved out and transported to the mouth and the water is expelled again. [5]
Individuals of Annachlamys flabellata become mature when they reach about 4.5 centimetres (1.8 in) in length. They seem to exhibit partial protandric sex reversal in that smaller individuals are mostly males but females predominate among larger individuals. [4] Nevertheless, some small females do exist as do some large males. In lagoons in New Caledonia with little thermal variation, spawning takes place at intervals throughout the year but the maximum spawning period occurs in the summer from November to March. Other than this, spawning exhibits no correlation to sea temperature variations, changes in salinity and the phases of the moon. [4] In mature individuals, the male gonads are cream coloured and the female gonads bright red. When ripe they are enlarged and visible in the live animal where they obscure the view of the animal's digestive tract. [4] The eggs are fertilised externally and the initial trochophore larvae soon develop into veliger larvae which form part of the zooplankton and disperse with the currents. After some weeks, these settle and undergo metamorphosis before becoming juveniles. [6]
Westralunio carteri is a species of freshwater mussel in the family Hyriidae. It is endemic to Western Australia. It is known by the common name Carter's freshwater mussel. This is the only species of the genus Westralunio found in Australia.
The European flounder is a flatfish of European coastal waters from the White Sea in the north to the Mediterranean and the Black Sea in the south. It has been introduced into the United States and Canada accidentally through transport in ballast water. It is caught and used for human consumption.
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The greater amberjack, also known as the allied kingfish, great amberfish, greater yellowtail, jenny lind, purplish amberjack, rock salmon, sailors choice, yellowtail and yellow trevally, is a species of predatory ray-finned fish in the family Carangidae, the jacks and pompanos. It is found in temperate, subtropical and tropical seas around the world. It is a popular quarry species for recreational fisheries as well as being an important species in commercial fisheries. It is the largest species in the family Carangidae.
Chlamys varia, common name the variegated scallop, is a species of small scallop, a marine bivalve mollusk in the family Pectinidae, the scallops. It occurs in the North Sea, the English Channel, the northeastern Atlantic Ocean and the Red Sea.
Spawn is the eggs and sperm released or deposited into water by aquatic animals. As a verb, to spawn refers to the process of releasing the eggs and sperm, and the act of both sexes is called spawning. Most aquatic animals, except for aquatic mammals and reptiles, reproduce through the process of spawning.
Pecten maximus, common names the great scallop, king scallop, St James shell or escallop, is a northeast Atlantic species of scallop, an edible saltwater clam, a marine bivalve mollusc in the family Pectinidae. This is the type species of the genus. This species may be conspecific with Pecten jacobaeus, the pilgrim's scallop, which has a much more restricted distribution.
Chlamys hastata, the spear scallop, spiny scallop or swimming scallop, is a species of bivalve mollusc in the family Pectinidae found on the west coast of North America from the Gulf of Alaska to San Diego, California. A limited number of these scallops are harvested by divers or by narrow trawls off the west coast of Canada.
Anodontia alba, or the buttercup lucine, is a species of bivalve mollusc in the family Lucinidae. It can be found along the Atlantic coast of North America, its range extending from North Carolina in the United States to the West Indies.
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.
Tellina tenuis, the thin tellin, is a species of marine bivalve mollusc in the family Tellinidae. It is found off the coasts of northwest Europe and in the Mediterranean Sea, where it lives buried in sandy sediments.
Adamussium is a monotypic genus of bivalve molluscs in the large family of scallops, the Pectinidae. The Antarctic scallop is the only species in the genus though its exact relationship to other members of the family is unclear. It is found in the ice-cold seas surrounding Antarctica, sometimes at great depths.
Holothuria tubulosa, the cotton-spinner or tubular sea cucumber, is a species of sea cucumber in the family Holothuriidae. It is the type species of the genus Holothuria and is placed in the subgenus Holothuria, making its full name Holothuria (Holothuria) tubulosa.
Crassadoma is a genus of rock scallops, marine bivalve molluscs in the family Pectinidae. It is monotypic, the only species being Crassadoma gigantea, the rock scallop, giant rock scallop or purple-hinge rock scallop. Although the small juveniles are free-swimming, they soon become sessile, and are cemented to the substrate. These scallops occur in the eastern Pacific Ocean.
Archaster typicus is a species of starfish in the family Archasteridae. It is commonly known as the sand star or the sand sifting star but these names are also applied to starfish in the genus Astropecten. It is found in shallow waters in the Indo-Pacific region.
Anadara kagoshimensis is an ark clam in the family Arcidae. It can be found in shallow water in temperate parts of the west Pacific Ocean and is cultivated in China, Japan, and Korea for human consumption. It is known as maohan in China and mogai in Japan.
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 in shallow parts of the eastern Atlantic Ocean. It is harvested for human consumption in Spain and other parts of Western Europe.
Antedon mediterranea is a species of stalkless crinoid in the family Antedonidae, commonly known as the Mediterranean feather star. It is found on the seabed at moderate depths in the Mediterranean Sea. It is a filter feeder and captures plankton with its long feathery arms.
Chlamys australis, common name the "austral scallop", is a species of scallop, a marine bivalve mollusc in the family Pectinidae, the scallops.
Potamocorbula amurensis is a species of small saltwater clam, a marine bivalve mollusc in the order Myida. Common names include the overbite clam, the Asian clam, the Amur River clam and the brackish-water corbula. The species is native to marine and brackish waters in the northern Pacific Ocean, its range extending from Siberia to China, Korea and Japan. It has become naturalised in San Francisco Bay.