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Arthropods (phylum Arthropoda) (from Greek ἀρθρον, meaning joint and πούς/ποδός, meaning foot) are the largest phylum of animals and include the insects, arachnids, crustaceans, and others. Approximately eighty percent of extant animal species are arthropods, with over a million modern species described and a fossil record reaching back to the early Cambrian. Arthropods are common throughout marine, freshwater, terrestrial, and even aerial environments, as well as including various symbiotic and parasitic forms. They range in size from microscopic plankton (~0.25 mm) up to forms several metres long.
Arthropods are characterised by the possession of a segmented body with appendages on each segment. They have a dorsal heart and a ventral nervous system. All arthropods are covered by a hard exoskeleton that is made out of chitin, a polysaccharide. Periodically, an arthropod sheds this covering when it moults. This covering makes arthropods less prone to dehydration.
Basic arthropod structure
More on [ Arthropod ]
Arthropods :: Invertebrates
Arthropoda :: Zoology
@fardarter If a prof says "annelids and arthropods are sister taxa because of numerous morphological similarities", what is your response?
Hannah (Hannah) Fri, 18 May 2012 13:54:08 -0000
@fardarter If a prof says "annelids and arthropods are sister taxa because of numerous morphological similarities", what is your response?
Alien Terrestrial Arthropods of Europe (BioRisk): This book provides the fi rst comprehensive review of the faun... http://t.co/e3NdJJoG
DinoWilliams2 (Dino Williams) Fri, 18 May 2012 13:16:01 -0000
Alien Terrestrial Arthropods of Europe (BioRisk): This book provides the fi rst comprehensive review of the faun... http://t.co/e3NdJJoG
They are arthropods who happen to look like a.
danawerel (Jagadayu Bartoszews) Fri, 18 May 2012 12:08:58 -0000
They are arthropods who happen to look like a.
Insect Virology: Viruses that are pathogenic to beneficial insects and other arthropods cause millions of dollar... http://t.co/uB621228
Dorothyawo (Young Jonke) Fri, 18 May 2012 11:13:58 -0000
Insect Virology: Viruses that are pathogenic to beneficial insects and other arthropods cause millions of dollar... http://t.co/uB621228
Arthropods in Livestock and Poultry Production (Ellis Horwood Series in Entomology): http://t.co/eN1VlNuG
JenniferFox18 (Jennifer Fox) Fri, 18 May 2012 10:15:28 -0000
Arthropods in Livestock and Poultry Production (Ellis Horwood Series in Entomology): http://t.co/eN1VlNuG
Hermit crab in a glass shell. http://t.co/X0mme4wS http://t.co/uLsEMsGh
SkidaddleGames (Thomas Hamlyn-Harris) Fri, 18 May 2012 06:48:20 -0000
Hermit crab in a glass shell. http://t.co/X0mme4wS http://t.co/uLsEMsGh
Botar by Eights - Breeder and supplier of tarantulas and scorpions, feed, and supplies.
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Curts Inverts - Supplies invertebrates of the American Southwest including tarantulas, scorpions, true spiders, myriapods, and insects.
Entomental - Sellers of stick insects, spiders, praying mantids and other arthropods. Includes care sheets and species information.
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The God Of Insects - Insects and other arthropods alive, dead and in pictures.
The Hissing Roach - Suppliers of the giant Madagascar hissing cockroach. Also have all of the required breeding supplies.
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