Synapsida[a] is a diverse group of tetrapod vertebrates that includes all mammals and their extinct relatives. It is one of the two major clades of the group Amniota, the other being the more …

Synapsids were present in the Carboniferous Period (about 359 million to 299 million years ago) and are one of the earliest known reptilian groups. They were the dominant… …reptiles of the …

May 16, 2023 · Watch this vid about synapsid: Biology definition: A synapsid refers to any animal belonging to the clade group Synapsida. Synapsids are believed to have descended from the …

The mammals of today are but one branch of the Synapsida, a great vertebrate group with a 300 million year history.

Synapsids are animals which have a single temporal fenestra. This is an opening located on the roof of the skull, which is usually located behind each eye socket. For this reason, synapsids …

The meaning of SYNAPSID is any of a subclass (Synapsida) of terrestrial vertebrates (such as the pelycosaurs and therapsids) having a single pair of lateral temporal skull openings.

Dec 5, 2025 · Because mammals, including humans, evolved directly from synapsid ancestors, we inherit the defining characteristic of the single temporal fenestra. While this opening has …

Synapsids are a group of amniotes that includes mammals and their extinct relatives. They are characterized by a single temporal fenestra, an opening in the skull behind each eye. …

Aug 1, 2025 · Explore the ancient synapsid lineage, a distinct group that uniquely bridged early vertebrate life to the emergence of all modern mammals.

(Mammal-like Reptiles)’ (2001) by Hans-Dieter Sues. In the phylogenetic system, the Synapsida include Mammalia and all other amnio. es more closely related to Mammalia than to Reptilia. …