Arthropoda
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Arthropoda
[ahr-throp´o-dah]a phylum of the animal kingdom that includes bilaterally symmetrical animals with hard, segmented bodies bearing jointed appendages; it embraces the largest number of known animals, with at least 740,000 species, divided into 12 classes. It includes the arachnids, crustaceans, and insects.
Ar·throp·o·da
(ar-throp'ŏ-dă),A phylum of the Metazoa that includes the classes Crustacea (crabs, shrimp, crayfish, lobsters), Insecta, Arachnida (spiders, scorpions, mites, ticks), Chilopoda (centipedes), Diplopoda (millipedes), Merostomata (horseshoe crabs), and various other lesser known or extinct groups. Arthropoda forms the largest assemblage of living organisms, including 75% of all insects, of which more than a million species are known.
[arthro- + G. pous, foot]
Ar·throp·o·da
(ahr-throp'ŏ-dă)A phylum of the Metazoa that includes the classes Crustacea (crabs, shrimp, crayfish, lobsters), Insecta, Arachnida (spiders, scorpions, mites, ticks), Chilopoda (centipedes), Diplopoda (millipedes), Merostomata (horseshoe crabs), and various extinct or less known groups. Arthropoda forms the largest assemblage of living organisms, 75% are insects, of which more than a million species are known.
[arthro- + G. pous, foot]