Synapsida

(redirected from synapsid)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

Synapsida

(in the taxonomy of reptiles), a subclass fossil form, having a single inferior temporal FOSSA on each side of the skull. These are the Theromorphs from which mammals probably evolved. The term is sometimes extended to include the mammals.
References in periodicals archive ?
This shows that caseid synapsids were much more ancient than previously documented in the fossil record.
Quantitative comparison of ontogenetic and phylogenetic character changes in the synapsid mandible and auditory region.
This single genus of synapsid, a mammal-like reptile, populated much of Earth for 5 million years.
Among the reptilian ancestors of mammals, turbinal ridges appear to go back as far as early pelycosaurs, the oldest (Late Carboniferous and Early Permian Periods) and most primitive group of synapsid reptiles.
Niassodon mfumukasi is the first new genus (and species) of a fossil vertebrate from Mozambique, and its holotype (name-bearing specimen) is a rare example of a basal synapsid that preserves the skull and much of the skeleton together.