Research topic: Arthropoda

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Arthropoda

The Columbia Encyclopedia, Sixth Edition
Arthropoda [Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans , insects , centipedes , millipedes , symphylans, pauropodans, and the extinct trilobites . Arthropods are characterized by a segmented body covered by a jointed external skeleton (exoskeleton), with paired jointed appendages on each segment; a complex nervous system with a dorsal brain, connective nerves passing around the anterior end of the digestive tract, and a ventral nerve cord with a ganglion in each body segment; an open circulatory system with a dorsal heart into... Read more
Arthropoda
Arthropoda The phylum Arthropoda is the largest and most varied in the animal kingdom. It includes well over one million described species. This represents approximately three-quarters of all known biological organisms, living or extinct. Countless... Read more
Arthropoda
Arthropoda A highly diverse phylum of jointed-limbed animals, which includes the crustaceans, arachnids, and insects as the major...trilobitoids, ostracodes , and crabs present, implying an earlier, hidden history, reaching back into the Precambrian. The Arthropoda comprise more than 75% of all animal species that ... Read more

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