Synapsida - Wikipedia
Synapsids evolved a temporal fenestra behind each eye orbit on the lateral surface of the skull. It may have provided new attachment sites for jaw muscles. A similar development took place in …
Temporal fenestra - Wikipedia
Synapsids, including mammals, have one temporal fenestra, which is ventrally bordered by a zygomatic arch composed of the jugal and squamosal bones. This single temporal fenestra is …
15.6: Evolution of Amniotes - Biology LibreTexts
2021年2月28日 · Compare the skulls and temporal fenestrae of anapsids, synapsids, and diapsids. Anapsids have no openings, synapsids have one opening, and diapsids have two …
The Fossil Non-mammalian Synapsid Collection at The Field …
Basal synapsids, often referred to colloquially as “pelycosaurs,” from North America are the major strength of The Field Museum's non-mammalian synapsid collection, comprising …
Jaws to ears in the ancestors of mammals - Understanding Evolution
Like birds, crocodiles, turtles, snakes, lizards, amphibians, and most fishes, the earliest synapsids had a bone in the back of the skull on either side called the quadrate that made the connection …
29.3C: Evolution of Amniotes - Biology LibreTexts
2024年11月23日 · The key differences between the synapsids, anapsids, and diapsids are the structures of the skull and the number of temporal fenestrae behind each eye. Temporal …
Morphology of the temporal skull region in tetrapods: research …
Synapsida share ancestrally an infratemporal fenestra (infrafenestral morphotype; 14 in Fig. 5) that enlarged during early therapsid evolution (e.g. Kemp, 1984). In most non-therapsidan …
29.6B: Evolution of Mammals - Biology LibreTexts
2024年11月23日 · Mammals are synapsids: they have a single opening in the skull. They are the only living synapsids as earlier forms became extinct by the Jurassic period. The early, non …
Mammal Skulls – Morphology of the Vertebrate Skeleton
Identify the bones and important features of the mammal skull. Distinguish among monotreme, marsupial, and placental mammal skulls based on morphology. Explore the evolution of the …
The mammalian skull: development, structure and function
2023年5月15日 · That reminds us that mammals are synapsids and their skull structure is deeply rooted in the Paleozoic, about 320 Ma . All three contributions show changes in the cranial …
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