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.
Towards mammal-like reptiles. According to present thinking, mammals evolved from an extinct group of âmammal-likeâ reptiles called the therapsids, and the therapsids from a family of pelycosaurs called the sphenacodonts.Pelycosaurs, of which sphenacodonts were surprisingly early representatives, first appeared in the late Carboniferous.part from amphibians, all the tetrapods that flourished at that time were reptiles. One branch of synapsid reptiles, the cynodonts, became progressively more mammal-like, and possibly one branch of cynodonts evolved into morganucodonts, which were even more mammal-like.