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All Ciconiiformes share the basic characteristics: a long bill and neck, a bulky body with a short tail, large, broad wings, and long legs and toes. Members of the family Ardeidae share a pectinate, or comblike, middle claw. Most herons, egrets, and bitterns have dagger-shaped bills. Those of storks are thicker and generally considerably longer.
Thumbnail description. Parasitic thorny headed worms with complex life cycles; sexes separated; adults found in intestines of vertebrates (definitive host), larvae found in hemocoel (body cavity) of arthropods (intermediate hosts) and sometimes in body cavities of vertebrates (paratenic or transport hosts)
Clam worms, sand worms, and tubeworms are found in every ocean habitat from warm tropical seas to cold polar waters. They swim in open water or crawl along the seashore or sea bottom. Many species dig in muddy or sandy ocean bottoms to establish temporary or permanent burrows and tubes.
With approximately 10,000 known species in 10 suborders, the order Isopoda falls under the class Malacostraca, subphylum Crustacea, phylum Arthropoda. Five of the predominant suborders are as follows: Asellota, marine and freshwater isopods. Epicaridea, parasitic isopods that live on or in other crustaceans.
In general, animals that have a body length of less than 5.1–5.9 in (13–15 cm) are called mice, and rats are those that are larger. Still, rats and mice diverged about 12 mya, and scientists believe that murines evolved from rodents in Eurasia.
2018年5月18日 · Hexapoda (Insecta) A class of the phylum Uniramia comprising about a million known species of arthropods (many more are thought to exist). They are distributed worldwide in nearly all terrestrial habitats.
2018年6月8日 · Arachnids. Arachnids (class Arachnida) form the second largest group of terrestrial arthropods (phylum Arthropoda), with the class Insecta being the most numerous. There are over 70,000 species of arachnids, which include such familiar creatures as scorpions, spiders, harvestmen or daddy longlegs, ticks, and mites, as well as the ...
