Definition of float in the AudioEnglish.org Dictionary. Meaning of float. What does float mean? Proper usage and pronunciation (in phonetic transcription) of the word float. Information about float in the AudioEnglish.org dictionary, synonyms and antonyms.
Mammals evolved from a group of mammal-like reptiles called the Synapsids, specifically the Therapsids, in the Triassic period, around 250 million years ago.
Repenomamus The only early mammal known to have hunted dinosaurs. Rugosodon The earliest multituberculate yet identified. Sinoconodon Another intermediate form between reptiles and mammals. Sinodelphys One of the earliest marsupials yet discovered.ozostrodon This Triassic critter may (or may not) have been the first true mammal. Fruitafossor The earliest digging mammal yet discovered. Hadrocodium This tiny mammal had an unusually large brain. Juramaia The earliest known placental mammal in the fossil record.