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Diapsida

Diapsida The name formerly given to a subclass of reptiles whose skulls are of the diapsid type. Today that classification has been abandoned as the more primitive and more advanced forms are not clearly related to one another and the diapsids are divided into two subclasses: the more primitive Lepidosauria (the scaly reptiles), and the more advanced Archosauria (ruling reptiles). The earliest known diapsids date from the end of the Palaeozoic. They occur in southern Africa in Upper Permian and Lower Triassic rocks. Birds are closely related to the archosaurs, and although their skulls have only one temporal opening, this is apparently derived from the fusion of the two diapsid apertures.

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"Diapsida." A Dictionary of Zoology. . Encyclopedia.com. 23 Aug. 2017 <http://www.encyclopedia.com>.

"Diapsida." A Dictionary of Zoology. . Encyclopedia.com. (August 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/diapsida-0

"Diapsida." A Dictionary of Zoology. . Retrieved August 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/diapsida-0

Diapsida

Diapsida See DIAPSID.

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"Diapsida." A Dictionary of Earth Sciences. . Encyclopedia.com. 23 Aug. 2017 <http://www.encyclopedia.com>.

"Diapsida." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/diapsida

"Diapsida." A Dictionary of Earth Sciences. . Retrieved August 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/diapsida