• Webster's Revised Unabridged Dictionary
    • n. pl Ichthyopterygia (Paleon) See Ichthyosauria.
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Century Dictionary and Cyclopedia
    • ichthyopterygia An order of extinct reptiles; the ichthyosaurs. In Owen's classification of 1860 it is the third order of the class Reptilia, and in that of 1866 the fifteenth order of Hæmatocrya, or cold-blooded vertebrates, having a fish-like body, with a very short neck; limbs adapted for swimming, and with more than 5 many-jointed digits; numerous short, biconcave vertebræ, and no sacrum; the anterior ribs with bifurcate heads; episternum, clavicles, postorbital and supratemporal bones, and parietal foramen present; small maxillaries; long and large premaxillaries; the teeth confined to the maxillary, premaxillary, and premandibular bones, and implanted in a common alveolar groove; large orbits with a circle of sclerotic plates; and two small nostrils. See cuts under Ichthyosauria and Ichthyosaurus.
    • ichthyopterygia [lowercase] Plural of ichthyopterygium.
    • ***


Webster's Revised Unabridged Dictionary
NL. See Ichthyopterygium


In literature:

ICHTHYOPTERYGIA, number of digits in the, ii.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin