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The majority of animal species are invertebrates; one estimate puts the figure at 97%. [1] Many invertebrate taxa have a greater number and diversity of species than the entire subphylum of Vertebrata. [2] Invertebrates vary widely in size, from 10 μm (0.0004 in) [3] myxozoans to the 9–10 m (30–33 ft) colossal squid. [4]
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.
Research on invertebrates is the foundation for current understanding of the genetics of animal development. C. elegans is especially valuable as the precise lineage of all the organism's 959 somatic cells is known, giving a complete picture of how this organism goes from a single cell in a fertilized egg, to an adult animal. [3]
Short-range endemic (SRE) invertebrates are animals that display restricted geographic distributions, nominally less than 10,000 km 2, that may also be disjunct and highly localised. [ 1 ] [ 2 ] [ 3 ] The most appropriate analogy is that of an island, where the movement of fauna is restricted by the surrounding marine waters, therefore ...
Subterranean fauna is found worldwide and includes representatives of many animal groups, mostly arthropods and other invertebrates. However, there is a number of vertebrates (such as cavefishes and cave salamanders), although they are less common. Because of the complexity in exploring underground environments, many subterranean species are ...
Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are a part of the subphylum Crustacea (/ k r ə ˈ s t eɪ ʃ ə /), a large, diverse group of mainly aquatic arthropods including decapods (shrimps, prawns, crabs, lobsters and crayfish), seed shrimp, branchiopods, fish lice, krill, remipedes, isopods ...
Marine invertebrates are invertebrate animals that live in marine habitats, and make up most of the macroscopic life in the oceans. It is a polyphyletic blanket term that contains all marine animals except the marine vertebrates , including the non- vertebrate members of the phylum Chordata such as lancelets , sea squirts and salps .
Soil mesofauna are invertebrates between 0.1mm and 2mm in size, [1] which live in the soil or in a leaf litter layer on the soil surface. Members of this group include nematodes , mites , springtails (collembola), proturans , pauropods , rotifers , earthworms , tardigrades , small spiders , pseudoscorpions , opiliones (harvestmen ...