A nauplius is the larva of many kinds of crustaceans. They can be found in ponds. It consists of a head and a telson; the thorax and abdomen have not developed yet. It has three pairs of appendages with which it swims; these become, in the adult, the antennules, the antennae, and the mandibles. Image File history File links A Nauplius of penaeid shrimp. ... Image File history File links A Nauplius of penaeid shrimp. ... Superfamilies Panaeoidea Aristeidae Benthesicymidae Penaeidae Sicyoniidae Solenoceridae Sergestoidea Luciferidae Sergestidae Prawns are edible, shrimp-like crustaceans, belonging to the sub-order Dendrobranchiata. ... Classes Class Branchiopoda Subclass Phyllopoda Subclass Sarsostraca Class Remipedia Order Enantiopoda Order Nectiopoda Class Cephalocarida Order Brachypoda Class Maxillopoda Subclass Mystacocarida Subclass Copepoda Subclass Branchiura Subclass Pentastomida Subclass Tantulocarida Subclass Thecostraca Infraclass Cirripedia Class Ostracoda Order Metacopina Subclass Myodocopa Subclass Podocopa Class Malacostraca Subclass Eumalacostraca Subclass Hoplocarida Subclass Phyllocarida The... The telson is the last division of the body of a crustacean. ... Diagram of a tsetse fly, showing the head, thorax and abdomen The thorax is a division of an animals body that lies between the head and the abdomen. ... In anatomy, the abdomen is a part of the body; in humans, it is the region between the thorax and the pelvis. ... An appendage is, in general, an external body part that projects from the body, or a natural prolongation or projection from a part of any organism. ... Antennae (singular antenna), are the paired appendages connecting to the first (and in crustaceans also to the second) segment of the head of the members of all subphyla of the arthropods except Chelicerata. ... The mandible (inferior maxillary bone) (together with the maxilla) is the largest and strongest bone of the face. ...
A larva similar to the trochosphere in some features, particularly in possessing a preoral ring of cilia and an apical plate, is found in the Polyzoa, and in adult Rotifera, which latter, in their ciliary ring and excretory organs, present some resemblance to the trochosphere, and are sometimes described as permanent adult trochospheres.
The nauplius is found throughout the group and is the more important of the two; the zoaea is confined to the higher members, in some of which it merely forms a stage through which the larva, hatched as a nauplius, passes in its gradual development.
The naupliuslarva is of classic interest because its occurrence has enabled zoologists to determine with precision the position in the animal kingdom of a group, the Cirripedia, which was placed by the illustrious Cuvier among the Mollusca.
The larva of a butterfly is a worm-like organism which creeps on and voraciously devours the foliage of certain plants (fig.
In the may-flies and dragon-flies, in which the larva is aquatic, the change is prepared for some time before the actual metamorphosis, the organs which are necessary for the aerial existence being gradually acquired during larval life.
In Phoronis the metamorphosis of the larva (Actinotrocha), which occurs on fixation, is gradually led up to, but the mode of destruction of some of the larval organs is peculiar; the brain and sense organs of the larva pass into the stomach and are digested.
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