Synapsida - Wikipedia
The synapsids are traditionally divided for convenience, into therapsids, an advanced group of synapsids and the branch within which mammals evolved, and stem mammals, (previously known as pelycosaurs), comprising the other six more primitive families of synapsids. [19]
Evolution of mammals - Wikipedia
Stem mammals (sometimes called protomammals or paramammals, and previously called mammal-like reptiles) — all synapsids, and all of their descendants, except for mammals themselves. [11] Stem mammals therefore include all pelycosaurs, and …
Crown group - Wikipedia
Stem mammals are those in the lineage leading to living mammals, together with side branches, from the divergence of the lineage from the Sauropsida to the last common ancestor of the living mammals.
Synapsids - Paleontology World
The non-mammalian members are described as mammal-like reptiles in classical systematics; they can also be called stem mammals or proto-mammals. Synapsids evolved from basal amniotes and are one of the two major groups of the later amniotes; the other is the sauropsids, a group that includes modern reptiles and birds.
The Stem-Mammals–a Brief Primer (with remarks)
2016年10月26日 · The Stem-Mammals–a Brief Primer. Mammals are but the only surviving members of a far grander, older lineage. By Darren Naish on September 20, 2016. PROVISIONAL AND IN-PREP MONTAGE (FOR MY TEXTBOOK ON VERTEBRATE HISTORY) DEPICTING A SELECTION OF STEM-MAMMALS. I’VE DRAWN FAR MORE THAN THE …
SYNAPSIDS: Stem-Mammals. Size comparison and data. Paleoart
Synapsids are a very diverse group of tetrapods from which all mammals came from. They started evolving in the Carboniferous, and most of these clades went extinct at the end of the Permian,...
Reptile-like physiology in Early Jurassic stem-mammals
2020年10月12日 · Stem mammals lacked the elevated endothermic metabolism of living mammals, highlighting the mosaic nature of mammalian physiological evolution.
Early Synapsids (“Proto-Mammals”) - The Common Descent Podcast
2018年11月4日 · Here are some good short overviews of synapsids and stem mammals. This 2014 dissertation gives a very technical, very detailed overview of pelycosaurs. And for an even more extensive overview of stem mammal and mammal evolution, look into The Origin and Evolution of Mammals by T. S. Kemp.
Jurassic fossil juvenile reveals prolonged life history in early mammals
2024年7月24日 · A paucity of fossil material of juveniles among early diverging mammaliaforms limits our understanding of early ontogenetic growth in these animals and the macroevolution of life history traits...
Late-surviving stem mammal links the lowermost Cretaceous of …
2018年6月1日 · Stem mammaliaforms are Mesozoic forerunners to mammals, and they offer critical evidence for the anatomical evolution and ecological diversification during the earliest mammalian history.