What is auricularia larva?
auricularia larva In Asteroidea and Holothuroidea, a larval form in which a sinuous, ciliated band outlines the body. A Dictionary of Zoology.
Table of Contents
What is auricularia larva?
auricularia larva In Asteroidea and Holothuroidea, a larval form in which a sinuous, ciliated band outlines the body. A Dictionary of Zoology.
What is Ophiopluteus larva?
the larva of echinoderms of the class Ophiuroidea. An ophiopluteus has four pairs of long processes, or arms, enclosing calcareous rods. These arms, which are covered with a strip of ciliate epithelium, enable the larva to swim.
What is the larval form of Echinodermata?
FORMS OF ECHINODERMATA LARVA
| Class of Phylum Echinodermata | Larval form |
|---|---|
| 1. Asteriodea 2. Ophiuroidea 3. Echinoidea 4. Hobturoidea 5. Crinoidea | Bipinnaria & Brachiolaria Ophiopkiteus Echinopkrteus Auricularia Dobolaria & Pentacrinoid |
What is Dipleurula larva?
Dipleurula is a hypothetical larva of the ancestral echinoderm. It represents the type of basis of all larva forms of, at least, the eleutherozoans (all echinoderms except crinoids), where the starfish, sea urchins, sea cucumbers and brittle stars belong.
What is radial larva?
Echinoderms are deuterostomes and hence cleavage is radial, holoblastic and indeterminate. The larvae hatch in water and feed and grow through successive larval stages to become adults. The larvae of echinoderms are bilaterally symmetrical but lose symmetry during metamorphosis.
What is the larva of Mollusca called?
veliger, larva typical of certain mollusks such as marine snails and bivalves and a few freshwater bivalves. The veliger develops from the trochophore (q.v.) larva and has large, ciliated lobes (velum).
What is planktonic larva?
The planktonic larval stages of invertebrate animals often look very different from the non-planktonic adults. After a period of hours to weeks to months in the plankton, larvae settle on a surface and metamorphose into their more familiar adult forms, such as the cup coral pictured to the left.
What is brachiolaria larva?
A brachiolaria is the second stage of larval development in many starfishes. It follows the bipinnaria. Brachiolaria have bilateral symmetry, unlike the adult starfish, which have a pentaradial symmetry.
In which group of animal auricularia larva is found?
Auricularia Larva: The externally bilaterally symmetrical larva (Fig. 21.39F) is present in Holothuroidea and is characterised in having a single longitudinal ciliated band. ADVERTISEMENTS: 2.
Which of the following larval forms is found in the class Holothuroidea?
As an echinoderm, members of the Holothuroidea are deuterostomes. The larvae, which are planktotrophic or lecithotrophic, have 3-part paired coeloms. Embryonic coelomic structures have specific fates as the bilaterally symmetrical larvae metamorphose into radially symmetric adults. The larvae develop in sea water.
What do you mean by Dipleurula?
Definition of dipleurula 1 : a hypothetical bilaterally symmetrical echinoderm larva sometimes regarded as a common ancestor of echinoderms and chordates. 2 : a larval echinoderm (such as a bipinnaria or an echinopluteus) —not used technically.
What is Megalopa larva?
Megalopa larva It has a broad and crab-like unsegmented cephalothorax. The carapace is produced anteriorly into a median spine. The eyes are large, stalked and compound. All the thoracic appendages are well formed of which the last 5 pairs are uniramous.
