arthropod+2

=Any of numerous invertebrate animals of the phylum Arthopoda, characterized by an exoskeleton made of chitin and a segmented body with pairs of jointed appendages. Arthropods share many features with annelids and may have evolved from them in the Precambrian Era. Arthropods include the insects, crustaceans, arachnids, myriapods, and extinct trilobites, and are the largest phylum in the animal kingdom= =theses are some example of an arthropoda: arachnids, centipedes, millipedes, insects, and crustations.=

An **arthropod** is an [|invertebrate] [|animal] having an [|exoskeleton] (external [|skeleton]), a segmented body, and jointed [|appendages]

They have over a million described species, making up more than 80% of all described living animal species, and are one of only two animal groups that are very successful in dry environments – the other being the [|amniotes]. They range in size from microscopic [|plankton] up to forms a few meters long..

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