Table of Contents
- 1 What is the larval stage of a crustacean called?
- 2 What kind of larva do crustaceans have?
- 3 Which is the name of crustacean larvae in given below list?
- 4 Which is the first larval form of Branchiopoda?
- 5 How do crustaceans differ from other arthropod groups?
- 6 What is the larval form of Arthropoda?
- 7 What are the appendages of the Nauplii larva?
- 8 What happens in the larval stage of a crustacean?
- 9 What kind of animal is a larva of a crab?
What is the larval stage of a crustacean called?
nauplius
In crustaceans the larva, called nauplius, does not differ substantially in mode of life or means of locomotion from the adult but has fewer appendages than the adult. A typical crustacean nauplius has three pairs of legs and an unpaired simple eye.
What kind of larva do crustaceans have?
The first larval stage for crabs, lobsters, shrimp, barnacles, copepods, and some other crustaceans is called a nauplius. The nauplii of different species all look alike so they are hard to tell apart. These larvae live in the water column as part of the zooplankton.
Which is the name of crustacean larvae in given below list?
ZOEA LARVA Zoea is the common larva of decapods and hence it has variations in its features in different species.
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.
How many larval form are in crustaceans?
This has resulted in development in decapod crustaceans being generally abbreviated. There are at most nine larval stages in decapods, as in krill, and both decapod nauplii and krill nauplii often lack mouthparts and survive on nutrients supplied in the egg yolk (lecithotrophy).
Which is the first larval form of Branchiopoda?
A typical branchiopod begins its life cycle as a nauplius larva, which has a simple undivided triangular body and three pairs of appendages: antennules, antennae, and mandibles.
How do crustaceans differ from other arthropod groups?
Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by their larval forms, such as the nauplius stage of branchiopods and copepods.
What is the larval form of Arthropoda?
Selected types of larvae
| Animal | Name of larvae |
|---|---|
| Arthropoda: Xiphosura | euproöps larva (“trilobite larva”) |
| Arthropoda: Pycnogonida | protonymphon |
| Crustaceans | General: nauplius, metanauplius, protozoea, antizoea, pseudozoea, zoea, postlarva, cypris, primary larva, mysis Decapoda: zoea Rhizocephala: kentrogon |
What is meant by trochophore larva?
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 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). In addition, the mollusk begins to develop a foot and shell during the veliger stage.
What are the appendages of the Nauplii larva?
There is a single, median, nauplius eye at the front of the head. There are only three pairs of appendages, the first and second antennae, and the mandibles. The second antennae and mandibles bear swimming setae.
What happens in the larval stage of a crustacean?
Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow.
What kind of animal is a larva of a crab?
Zoea The genus Zoea was initially described by Louis Augustin Guillaume Bosc in 1802 for an animal now known to be the larva of a crab. The zoea stage (plural: zoeas or zoeae) is characterised by the use of the thoracic appendages for swimming and a large dorsal spine.
What are the names of the different types of crustaceans?
The names of these genera have become generalised to cover specific larval stages across wide groups of crustaceans, such as zoea and nauplius. Other terms described forms which are only found in particular groups, such as the glaucothoe of hermit crabs, or the phyllosoma of slipper lobsters and spiny lobsters .
Which is an example of a parasitic larva?
In a more extreme example, the Sacculina and other Rhizocephala have a distinctive nauplius larva with its complex body structure, but the adult form lacks many organs due to extreme adaptation to its parasitic life style.