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Invertebrate zoology is the biological discipline that consists of the study of invertebrate animals, i.e. animals without a backbone (a structure which is found only in fish, amphibians, reptiles, birds and mammals.) Invertebrates are a vast and very diverse group of animals that includes sponges, echinoderms, tunicates, numerous different phyla of worms, molluscs, arthropods and many additional phyla. Single-celled organisms or protists are usually not included within the same group as invertebrates. ==Subdivisions== Invertebrates are 97% of all named animal species, and because of that fact, this subdivision of zoology has many further subdivisions, including but not limited to: *Arthropodology - the study of arthropods, which includes : *Arachnology - the study of spiders and other arachnids : *Entomology - the study of insects : *Carcinology - the study of crustaceans : *Myriapodology - the study of centipedes, millipedes, and other myriapods *Cnidariology - the study of Cnidaria *Helminthology - the study of parasitic worms. *Malacology - the study of mollusks, which includes : *Conchology - the study of Mollusk shells. : *Limacology - the study of slugs. : *Teuthology - the study of cephalopods. *Invertebrate paleontology - the study of fossil invertebrates These divisions are sometimes further divided into more specific specialties. For example, within arachnology, acarology is the study of mites and ticks; within entomology, lepidoptery is the study of butterflies and moths, Myrmecology is the study of ants and so on. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Invertebrate zoology」の詳細全文を読む スポンサード リンク
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