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What is a Reptilian ancestors of mammals that had features of both reptiles and mammals?
Mammal-like reptiles that lived in the Permian, like cynodonts or therapsids.
The pre dinosaur ancestors of the mammals therapsids combined features of mammals and what other kind of creatures?
Reptiles
What are Therapsids?
Therapsids were a group of reptiles with an erect posture and feet that pointed forward. Some also had incisors, canines, and molars, which is unique because most reptiles only have one type of tooth. Mammals evolved from therapsids.
Which of the following is NOT a group of therapsids. Herbivors or carnivors?
Herbivors is not a group of therapsids. Therapsids include herbivores and carnivores, among other types of mammals that arose during the Permian period. Herbivores are a dietary category, not a taxonomic group.
Which reptile is the ancestor of mammals?
therapsids
What are some similarities and differences between therapsids and thecodonts?
Therapsids started as a group of reptiles with an erect posture and feet that pointed forwards. Many also had incisors, canines, and molars. Mammals evolved from therapsids, and hence are considered to be a member of the therapsid group. Thecodont was a term used to group certain archosaurian reptiles. However, it has been discovered that these reptiles did not belong to one group, hence the term "thecodont" is dubious. In any case, archosaurs are reptiles including dinosaurs, crocodilians, birds, and others.
What kind of mammals were on earth during dinosaur ages?
During the end of the Triassic period, the first mammals evolved from therapsids, or mammal like reptiles. Some of these mammals were the Purgatorius, a tiny rodent like creature, and the Castorocauda, which had beaver like characteristics.
What are the main features of the animal kingdom?
mammals amphibians and reptiles birds
Why is the pelycosaur a link between mammals and reptiles?
The pelycosaurs are considered a link between mammals and reptiles because they exhibit features of both groups. They share characteristics with early mammals, such as differentiated teeth and possibly some aspects of their skull structure, while also possessing reptilian-like features including sprawling posture and lack of a secondary palate. This combination of traits positions them as transitional forms between the two groups in evolutionary history.
How do paleontologists distinguish between fossils of mammals and reptiles?
There are a variety of features but one is the number of fenestrae in the skull. Mammals also have more differentiated teeth than reptiles. Furthermore, you can look at the gait. Mammals have a parasagittal stance, while most reptiles have a sprawled stance.
Are alligator's mammals?
No, alligators are not mammals, they are reptiles.
Are turtles mammals or reptiles?
Turtles are reptiles, not mammals.
