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In general, arthropods have mouthparts for cutting, chewing, piercing, sucking, shredding, siphoning, and filtering. This article outlines the basic elements of four arthropod groups: insects, myriapods, crustaceans and chelicerates. Insects are used as the model, with the novel mouthparts of the other groups introduced in turn.
Crustaceans have a pair of mandibles that typically consist of an enlarged basal segment (coxa) and a palp (sensory feeler) consisting of all other segments. In some groups, such as the Branchiopoda, the palp is reduced or absent. Crustacean mandibles may be equipped with special teeth (molar and incisor processes).
They have adaptations to allow for this including stout flattened teeth, hypertrophied jaw adductor muscles and robust jaws to feed on hard prey such as crustaceans and molluscs. Sharks that crush prey have teeth with small, low rounded cusps that are numerous per row, or are molariform. The molariform teeth are smoothly rounded, lack cusps ...
It is 1.2 times as wide as it is long, and has no paraocular ornamentation. The frontal border is broadly rounded, slightly concave anteriorly, and produced. The backward-directed mandible on the third-stage praniza has eight large triangular teeth and two small teeth at the tip. [2] Female Gnathia marleyi with eggs
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.
The specific derived morphology of the teeth on the mandible varies depending on whether the insect eats broad-leafed herbs or grasses. [ citation needed ] This same simple structure is seen in all of the remaining Polyneopteran insect orders, with the exception of the Paraneoptera ( Hemiptera , Thysanoptera , and Phthiraptera ).
Engraved on the tooth is a picture of the ship Francis, which artist Fred Myrick served on during the early 1800s. Now, sperm whales are protected under the Marine Mammal Protection Act. So, in ...
Crustaceans are members of the sub-phylum Crustacea, a large group of arthropods (55,000 species). They include various familiar animals, such as lobsters , crabs , shrimp and barnacles . They are variously found in marine and freshwater, with a few terrestrial members (such as woodlice ).