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Probainognathia
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<p>Probainognathia is one of the two major subgroups of the clade <a href="/facts/Eucynodontia/Uwhrbfa6">Eucynodontia</a>, the other being <a href="/facts/Cynognathia/It6GXN0b">Cynognathia</a>. The earliest forms were <a href="/facts/Carnivorous/q6h6aSqe">carnivorous</a> and <a href="/facts/Insectivorous/ukA7UnLr">insectivorous</a>, though some groups eventually also evolved <a href="/facts/Herbivorous/me4YFdQA">herbivorous</a> diets. The earliest and most basal probainognathian is the <a href="/facts/Middle_Triassic/Y0FBoqA8">Middle Triassic</a> (<a href="/facts/Anisian/ck89Rqhu">Anisian</a>) aged <i><a href="/facts/Lumkuia/RFJnxGIz">Lumkuia</a></i>, from <a href="/facts/South_Africa/vvXQpLgq">South Africa</a>, though probainognathians would not become prominent until the mid <a href="/facts/Norian/MtxaHnyD">Norian</a> stage of the Late Triassic. Three groups survived the <a href="/facts/Triassic%E2%80%93Jurassic_extinction_event/5XKTUdt6">extinction</a> at the end of Triassic: <a href="/facts/Tritheledontidae/ebVuU7rS">Tritheledontidae</a> and <a href="/facts/Tritylodontidae/WbAwsPgd">Tritylodontidae</a>, which both survived until the <a href="/facts/Jurassic/o5Cy4KzX">Jurassic</a>—the latter even into the <a href="/facts/Cretaceous/nwKtFtKx">Cretaceous</a> (<i><a href="/facts/Montirictus/gRr9qCoz">Montirictus</a></i> and <i><a href="/facts/Xenocretosuchus/KmbVkGhe">Xenocretosuchus</a></i>)—and <a href="/facts/Mammaliaformes/FvX0owYy">Mammaliaformes</a>, which includes the <a href="/facts/Mammals/phSwTzBo">mammals</a>. </p>