Definition: The term "gigantostracan" is a scientific name for an extinct group of animals that lived in the Late Cretaceous period about 69 million years ago. These creatures are known as gigantosaurs, and they were characterized by their large size, long limbs, and distinctive features such as elongated jaws and sharp teeth. The term "gigantostracan" is often used to describe these animals because of the similarity in appearance and characteristics between them and other
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