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The mandible (from Latin: mandibula or mandĭbŭ-lum, a jaw) [1] of an arthropod is a pair of mouthparts used either for biting or cutting and holding food. Mandibles are often simply called jaws. Mandibles are often simply called jaws.
Crustaceans comprise a number of classes, with various feeding modes supported by a range of adaptations to the mouthparts. In general, however, crustaceans possess paired mandibles with opposing biting and grinding surfaces. The mandibles are followed by paired first and second maxillae.
The decapod (crustaceans, such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon . [1] [2] Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail:
Mandibulates include the crustaceans, myriapods (centipedes and millipedes), and all true insects. The name "Mandibulata" refers to the mandibles , a modified pair of limbs used in food processing, the presence of which are characteristic of most members of the group.
The crustacean, which is almost translucent, has a relatively proportional body except for two large front claws. While it typically lives in the waters off Indonesia and the Philippines, the ...
In this malacostracan crustacean diagram, the maxillae are labelled maxilla and maxillula. In arthropods , the maxillae (singular maxilla ) are paired structures present on the head as mouthparts in members of the clade Mandibulata , used for tasting and manipulating food.
Gnathia marleyi is a species of crustacean in the family Gnathiidae. [2] It is named after reggae musician Bob Marley. [3] It is a parasite that infests and feeds on the blood of such fish as the French grunt (Haemulon flavioliniatum). This tiny species is only found in the Caribbean Sea. It only eats while in the juvenile stage.
The mandible and its palpilform branch are well developed, and, as well as the three pairs of foot-jaws, exactly resemble those of Diaptomus. The four anterior pairs of feet are all alike, and consist of a basal stalk of two articulations, and two branches of unequal size. The inner branch is much the smaller, but both are divided into two joints.