Trechnotheria
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Trechnotheria is a group of mammals that includes the therians and some fossil mammals from the Mesozoic Era. It includes both the extinct symmetrodonts and the living Cladotheria.
Zhangheotherium quinquecuspidens
Fox British Wildlife Centre
Tachyglossus aculeatus Cayley
Repenomamus BW
Eutriconodonta
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Eutriconodonta is an order of early mammals. Eutriconodonts existed in Asia, Africa, Europe, North and South America during the Jurassic and the Cretaceous periods. The order was named by Kermack et a
Illustration of the lower jaw of Triconodon mordax, 1861
Cronopio NT