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Therapsid - Wikipedia, the free encyclopedia
Therapsida is a group of synapsids that includes mammals and their ancestors.Many of the traits today seen as unique to mammals had their origin within early therapsids, including having their four limbs extend vertically beneath the body, as opposed to the sprawling posture of other reptiles.
https://en.wikipedia.org/wiki/Therapsid
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Gorgonopsid - YouTube
Video on the Real Creatures of Primeval discussing synapsids and gorgonopsids.
https://www.youtube.com/watch?v=m6HLIHew0Tk
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Synapsid - Wikipedia, the free encyclopedia
Synapsids (Greek, 'fused arch'), synonymous with theropsids (Greek, 'beast-face'), are a group of animals that includes mammals and every animal more closely related to mammals than to other living amniotes.
https://en.wikipedia.org/wiki/Synapsid
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Gorgonops - Wikipedia, the free encyclopedia
Gorgonops is an extinct genus of therapsid which lived about 260-254 million years ago, during the Late Permian. It was a typical representative of the suborder Gorgonopsia, the dominant predators of their day, which in the largest forms grew to over three metres long.
https://en.wikipedia.org/wiki/Gorgonops
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Gorgonopsia - Wikipedia, the free encyclopedia
Gorgonopsia ("Gorgon face") is an extinct suborder of therapsid synapsids. Like other therapsids, gorgonopsians (or gorgonopsids) were at one time called "mammal-like reptiles" as well as "stem mammals".
https://en.wikipedia.org/wiki/Gorgonopsia
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Therapsid - Fossil Tetrapod Order - Britannica
Therapsid, any member of a major order (Therapsida) of reptiles of Permian and Triassic time (from 299 million to 200 million years ago). Therapsids were the stock that gave rise to mammals.
http://www.britannica.com/animal/therapsid
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On the Origin of Therapsids - The New York Times
Rocks preserved in the ParnaÃba Basin of northeastern Brazil may hold clues about the early history of therapsids, a precursor to mammals.
http://scientistatwork.blogs.nytimes.com/2012/04/12/on-the-origin-of-therapsids
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Therocephalia - Wikipedia, the free encyclopedia
Therocephalia is an extinct suborder of eutheriodont therapsids from the Permian and Triassic. The therocephalians ("beast-heads") are named after their large skulls, which, along with the structure of their teeth, suggest that they were carnivores.
https://en.wikipedia.org/wiki/Therocephalia
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BBC Nature - Therapsids Videos, News and Facts
The therapsids include all mammals plus the many mammal-like reptiles, such as Dicynodon and the sabre-toothed gorgonopsids.
http://www.bbc.co.uk/nature/life/Therapsida
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Therapsid - New World Encyclopedia
Therapsids (order Therapsida, class synapsid), are "mammal-like reptiles" that flourished from the Early Permian to the Late Triassic periods (c. 275 - 205 million years ago) and are thought to have been the precursors of mammals.
http://www.newworldencyclopedia.org/entry/Therapsid
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Nocturnality in Synapsids Predates the Origin of Mammals by Over 100 Million Years
Nocturnality is widespread among extant mammals and often considered the ancestral behavioural pattern for all mammals. However, mammals are nested within a larger clade,
http://rspb.royalsocietypublishing.org/content/281/1793/20141642
