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Arthropods (/ ˈ ɑːr θ r ə p ɒ d / ARTH-rə-pod) are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated segments, and paired jointed appendages.
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Arthropods (/ ˈ ɑːr θ r ə p ɒ d / ARTH-rə-pod) are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated segments, and paired jointed appendages.
Mar 26, 2024 · 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. About 84 percent of all known species of animals are members of this phylum. Learn more about arthropods in this article.
- Arthropods Definition
- Types of Arthropods
- Examples of Arthropods
- Related Biology Terms
- Quiz
An “arthropod” is an invertebrate animal that has an exoskeleton, a segmented body, and jointed appendages. The following families of organisms are all examples of arthropods: It may help to remember that the term “arthropod” comes from the Greek words for “jointed foot.” If the organism has an exoskeleton with joints between its feet and its body,...
Trilobites
Trilobites were an ancient family of marine arthropods that went extinct during the Permian-Triassic extinction event. Today, they are known to us mostly through fossils like the one below. They lived on the ocean floor and occupied ecological niches similar to those occupied by crustaceans today.
Chelicerates
Chelicerata are a branch of the arthropod family tree that, at first glance, may not appear related to each other. This family includes arachnids (such as spiders and scorpions), sea spiders (which look similar to arachnids but have some important differences), and horseshoe crabs (which, despite their name, have important differences from other crustaceans).
Myriapods
The term “myriapod” means “many legs” – so it is not surprising that centipedes, milipedes, and other many-legged creatures are part of this family. Myriapods can have anywhere from less than ten legs – to over 750! That just seems excessive. Myriapods are typically found in forests and other ecosystems where there is lots of decaying plant and animal material for them to feed on.
Ants
When you think of a stereotypical arthropod body, you probably think of an ant. Ants have hard exoskeletons and jointed legs. They also have bodies which are clearly segmented into a head, thorax, and abdomen. Ants show one type of social organization that has been developed by arthropods. Ants, bees, and termites are all what is called “eusocial” organisms – organisms living in extreme degree of cooperation, with “colonies” that almost operate like a single organism themselves. Most arthropo...
Spiders
Spiders are also arthropods, possessed of hard exoskeletons, segmented bodies, and jointed limbs. Spiders typically eat smaller arthropods, such as gnats and flies – though they will eat any living thing they can catch, and some particularly huge spiders have been known to eat birds or rodents! Spiders have evolved a variety of strategies for catching their prey – some spin sticky, nearly invisible webs that prey animals wander into and get stuck. Others are active hunters, including jumping...
Lobsters
With lobster being considered a luxury food today, it’s easy to forget that lobsters are in the same family as spiders and ants. Crustaceans can grow bigger underwater than on land – and lobsters can grow to weigh nearly 50 pounds! Lobsters’ body design has changed little in the last 100 million years, and their anatomy is spectacularly weird. The lobster’s kidneys are located in its head, its brain in its throat, and its teeth in its stomach. Its “ears” for picking up sound are located in it...
Common ancestor– A common ancestor is an individual or species from which multiple individuals or species evolved.Evolution– The process by which populations change over time, due to random mutation and the pressures of natural selection.Extinction– The process by which a species ceases to exist after the death of its last member. Most species that have lived on Earth to date are now extinct.1. Which of the following is NOT true of arthropods? A. They have exoskeletons made of chitin. B. They are symmetrical, having the same features on one side of their body as the other. C. They colonized land long before vertebrate animals did. D.None of the above. 2. Which of the following is NOT a type of arthropod? A. Hexapods B. Crustaceans C. C...
Arthropods (/ ˈ ɑːr θ r ə p ɒ d / ARTH-rə-pod) are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated segments, and paired jointed appendages.
Arthropods are not only the largest phylum of invertebrates. They are by far the largest phylum of the animal kingdom. Roughly 80 percent of all animal species living on Earth today are arthropods. Obviously, arthropods have been extremely successful. What accounts for their success?
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What is an arthropod? Arthropods are a motley crew: cockroaches, crabs, butterflies, beetles, centipedes, scorpions, shrimp, spiders, lobsters, lice, ticks, termites, potato bugs, and sea monkeys (a.k.a., brine shrimp) — they’re all examples of arthropods.
