Definitions for ichthyopterygia

This page provides all possible meanings and translations of the word ichthyopterygia

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  1. Ichthyopterygia

    see Ichthyosauria

  2. Origin: [NL. See Ichthyopterygium.]

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  1. Ichthyopterygia

    Ichthyopterygia was a designation introduced by Sir Richard Owen in 1840 to designate the Jurassic ichthyosaurs that were known at the time, but the term is now used more often for both true Ichthyosauria and their more primitive early and middle Triassic ancestors. Basal ichthyopterygians were mostly small with elongate bodies and long spool shaped vertebrae, indicating that they swam in a sinuous eel-like manner. This allowed for quick movements and maneuverability that were an advantage in shallow-water hunting. Even at this early stage they were already very specialised animals with proper flippers, and would have been incapable of movement on land. These animals seem to have been widely distributed around the coast of the northern half of Pangea, as they are known the Late Olenekian and Early Anisian of Japan, China, Canada, and Spitsbergen. By the later part of the Middle Triassic they were extinct, having been replaced by their descendents the true ichthyosaurs.


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