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 diverse …

Jan 22, 2026 · Synapsids are animals which have a single temporal fenestra. This is an opening located on the roof of the skull, usually found behind each eye socket. For this reason, synapsids differ from …

May 16, 2023 · Synapsids now form a separate branch of the tree of life, according to phylogenetic analysis. The monophyly of Synapsida is undeniable, and phrases like “Synapsida contains the …

All the animals you see on this evogram are synapsids, the group that gave rise to the mammals. Sometimes synapsids are called “mammal-like reptiles;” however, that is misleading because …

Synapsids (Greek, ‘fused arch’), synonymous with theropsids (Greek, ‘beast-face’), are a group of animals that includes mammals and every animal more closely related to mammals than to other …

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…

Synapsids, identifiable by a single fenestra on each side of the skull, encompass mammals and their ancestors, including the well-known Dimetrodon. Diapsids, featuring two skull fenestrae, comprise a …

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.

This article explains why humans are classified as synapsids, exploring the defining features of this group and charting the evolutionary path that connects these ancient creatures to modern mammals, …

Synapsids are one of the two major groups of amniotes. Both groups evolved from early amniotes about 345 million years ago during the early or mid Carboniferous period.