How do trochophore larvae move?
The classic trochophore – a larval form shared with some other lophotrochozoans (e.g., molluscs) – is a top-shaped free-swimmer that moves through the water propelled by characteristic bands of cilia and usually has a sensory apical tuft of cilia (Fig.
What are the characteristics of a trochophore?
trochophore, also called trochosphere, small, translucent, free-swimming larva characteristic of marine annelids and most groups of mollusks. Trochophores are spherical or pear-shaped and are girdled by a ring of cilia (minute hairlike structures), the prototroch, that enables them to swim.
What are two functions of the cilia in a trochophore?
The cilia on a trochophore are moved rapidly in order to create a water eddy, thus controlling the direction of their movement. List the main parts in the basic body plan of a mollusk. the four main parts of a mollusk are the head, the foot, the visceral mass and the shell it resides in.
What is the evolutionary significance of trochophore larva?
Trochophore larva has a prominent status in the evolutionary context. Studies are suggestive of the Trochophore larva as a bridge between radial and bilateral symmetry. The larval form shows similarities with many invertebrate groups.
What is the difference between trochophore and veliger larvae?
Unlike the trochophore, the newly hatched veliger may have or will develop many of the characteristic features of the adult including such structures as a muscular foot, eyes, rhinophores, a fully developed mouth, and a spiral shell (in fact, the veliger of nudibranchs has a shell, although the adult does not).
Which lophotrochozoans have a trochophore larva in their lifecycle?
As lophotrochozoans, the organisms in this superphylum possess either lophophore or trochophore larvae. The exact relationships between the different phyla are not entirely certain. The lophophores include groups that are united by the presence of the lophophore, a set of ciliated tentacles surrounding the mouth.
What do Trochophores eat?
Feeding habits Trochophore larvae are often planktotrophic; that is, they feed on other plankton species.
What is the role of trochophore larvae?
The anatomy of a trochophore A trochophore (/ˈtroʊkəˌfɔːr, ˈtrɒ-, -koʊ-/; also spelled trocophore) is a type of free-swimming planktonic marine larva with several bands of cilia. By moving their cilia rapidly, they make a water eddy, to control their movement, and to bring their food closer, to capture it more easily.
What is the function of Telotroch?
From Wikipedia, the free encyclopedia. Telotroch is the free-swimming stage of members of the order Sessilida. Sessilida are ciliates of the subclass Peritrichia. A sessile individual can turn into a motile one to migrate to a better place.
Do all mollusks have trochophore larvae?
Molluscs include such familiar creatures as clams, oysters, snails, and octopi. They share a distant common ancestor with the annelid worms, an evolutionary heritage suggested by their larval form, called a trochophore larva, found in all molluscs and in certain marine annelids called polychaete worms.
Do all lophotrochozoans have a trochophore larva?
As lophotrochozoans, the organisms in this superphylum possess either lophophore or trochophore larvae. The exact relationships between the different phyla are not entirely certain.