Class Hexapoda, or Insecta. Arthropods are classified into five sub-phylum and each then subdivide into classes (a total of 16 classes according to recent classification of animal taxa). •List the four main groups of arthropods and describe the features of each. Arthropods, which make up the phylum Arthropoda, is the largest group of invertebrates (animals without a vertebral column) consisting of well over 80 percent of all animals. PDF | The past two decades have witnessed profound changes in our understanding of the evolution of arthropods. Arthropods are classified into five sub-phylum and each then subdivide into classes (a total of 16 classes according to recent classification of animal taxa). Carapace may be present, vestigial or absent. Habitat: mostly terrestrial, also aquatic. The origin and evolution of arthropods. About 84 percent of all known species of animals are members of this phylum. Arthropods are animals that have jointed legs. It is a phylum of triploblastic, haemocoelomic, segmented invertebrates having head, thorax and abdomen, a chitinous exoskeleton and jointed legs and appendages. Body is segmented, with head of 6 segments, a thorax ot 8 segments and an abdomen of 6 segments. Body has Three-part: head, thorax, abdomen. Body cavity: The true coelom is greatly reduced in adults, and is only represented by the cavities of the reproductive and excretory organs. Insects are the most successful life form on the planet: they make up more than half of all living things on Earth. Arthropods -KEY. 1- Crustaceans: Habitat: They are especially marine. Arthropods are animals that have jointed legs. All arthropods have segmented bodies divided into a head, jointed legs and abdomen. However, the members of this phylum, despite their incredible diversity and sheer numbers, share a number of important distinguishing characteristics. The body is covered with a thick, tough and non-living chitinous cuticle, which forms the exoskeleton. There are also freshwater (crayfish) and terrestrial groups (sowbugs or roly-poly bug) Support and protection: are provided by a hard-strong shell called as Exoskeleton that is made up of CaCO3. For each group below, determine the name of the group and give examples. Arthros; Jointed, podos; Foot) Kingdom: Animalia. Some prominent ones include insects, spiders, ants, bees, crabs, shrimps, millipedes, centipedes etc. The phylum Arthropoda is comprised of the classes Crustacea, Arachnida, Chilopoda, Diplopoda and Insecta. For each group below, determine the name of the group and give examples. Definition, Characteristics, Classification and Habitat Definition: What are Arthropods? Given the vast (and still undiscovered) diversity of the crustacean and insect kingdoms, it's impossible to generalize about these arthropods' means of reproduction. Introduction to Arthropod Groups Entomology 340. What is Entomology? Gereral Characteristics of Phylum Arthropoda. The success of the arthropods can mainly be attributed to the presence of exoskeleton, … •Phylum Arthropoda •Subphylum-Chelicerata •Class Arachnida ... •Describe the characteristics of arthropods. This is the largest and most successful of the animal phyla, with over 1 000 000 identified species. Phylum called Arthropoda (arthropods) is the largest and most successful of the animal phyla. Phylum Arthropoda. Body cavity: The true coelom is greatly reduced in adults, and is only represented by the cavities of the reproductive and excretory organs. Classes of Arthropods . The body is covered with a thick, tough and non-living chitinous cuticle, which forms the exoskeleton. Arthropods -KEY. Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Original File: Arthropod-chart.html. Arthropods, members of the phylum Arthropoda, are a diverse group of animals including insects, crustaceans, spiders, scorpions and centipedes. Arthropods are joint-legged animals and you must have come across a few of these animals. Arthropod, any member of the phylum Arthropoda, the largest phylum in the animal kingdom, which includes such familiar forms as lobsters, crabs, spiders, mites, insects, centipedes, and millipedes. 4. Arthropods include creatures that live in water, on land and in the air. The characteristics of arthropods include an exoskeleton, well-developed sense organs, jointed appendages, tagmata body regions, a ventral nervous system and bilateral symmetry. General Characteristics and Classification of Arthropoda Arthropoda (Arthon- Jointed; podos- legs) Arthropoda, animals having jointed appendages or legs. Suffice it to say that the vast majority of arthropods lay eggs and that most species consist of recognizable males and females.