Animals World

List of animals on letter I

Invertebrates

Invertebrates

Type of animal science: Classification
Fields of study:Anatomy, developmental biology, ecology, entomology, histology, invertebrate biology, marine biology, physiology
Over 98 percent of all known animal species are invertebrates, animals without backbones. At the base of many food webs, invertebrates provide nutrients to a wide range of other animals on land, underground, and in the seas. The diversity within the invertebrates is amazing, ranging from single-celled protozoans to cephalochordates possessing nerve cords, and claiming close relationship to vertebrates.

Ichthyosaur

Ichthyosaur

Type of animal science: Anatomy, classification, evolution
Fields of study: Anatomy, paleontology
Ichthyosaurs are extinct marine reptiles of the Mesozoic era. They were highly adapted to the marine habitat, having evolved a dorsal fin, flippers, and a tail fin. These fleshy features are often preserved in spectacular fossils from the Holzmaden and Solnhofen deposits in Germany.

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