The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the...

Monotremes (/ˈmɒnətriːmz/) are mammals of the order Monotremata. They are the only known group of living mammals that lay eggs, rather than bearing live...

"Condylarths: Archaic hoofed mammals" in Paleocene mammals of the world Savage, RJG, & Long, MR (1986). Mammal Evolution: an illustrated guide. New York:...

palate of marsupials contains more openings compared to placental mammals. Teeth in marsupials also differ significantly from those in placental mammals. For...

as well. Mammals portal Cetaceans portal Evolutionary biology portal Paleontology portal Aquatic adaptation Evolution of mammals Evolution of sirenians...

A mammal (from Latin mamma 'breast') is a vertebrate animal of the class Mammalia (/məˈmeɪli.ə/). Mammals are characterized by the presence of milk-producing...

prostate evolution in monotreme mammals. Testicular descent occurs to a variable degree in various mammals, ranging from virtually no change of position...

and lower jaws contain several bones not found in mammals. Over the course of the evolution of mammals, one bone from the lower and one from the upper jaw...

physiology, and most mammals are still nocturnal. Mammals evolved from cynodonts, a group of superficially dog-like synapsids in the wake of the Permian–Triassic...

relatives. They are the only extant herbivorous marine mammals and the only group of herbivorous mammals to have become completely aquatic. Sirenians are thought...

bi-pedal and quadrupedal locomotion. Evolution of mammals List of fossil primates Primate#Evolution Timeline of human evolution Maxwell 1984, p. 296 Rui Zhang;...

Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans (whales, dolphins and...

(thēríon) 'wild beast') is a subclass of mammals amongst the Theriiformes. Theria includes the eutherians (including the placental mammals) and the metatherians (including...

of similar placental and marsupial forms is described by Richard Dawkins in The Blind Watchmaker as a case of convergent evolution, because mammals on...

Handbook of the Mammals of the World, Volume 1: Carnivora. Barcelona: Lynx Ediciones. pp. 50–658. ISBN 978-84-96553-49-1. Barycka, E. (2007). "Evolution and...

semiaquatic mammals are a diverse group of mammals that dwell partly or entirely in bodies of water. They include the various marine mammals who dwell in...

domesticated mammals, domesticated cat breeds have very few genetic differences from their wild counterparts due to constant intermixing, with thousands of years...

elephants and kangaroos are unusual among mammals because they are polyphyodonts, in contrast to most other mammals which replace their teeth only once in...

The evolution for semelparity in both sexes has occurred many times in plants, invertebrates, and fish. It is rare in mammals because mammals have obligate...

clade composing of a major group of eupelycosaurian synapsids that includes mammals and their ancestors and close relatives. Many of the traits today...

(1984). The evolution of mammalian characters. Croom Helm. ISBN 0-7099-1534-9. Kemp T.S. 2005. The origin and evolution of mammals. Oxford University Press...

fossils of Echinerpeton and perhaps an even earlier genus, Protoclepsydrops, representing just one of the many stages in the evolution of mammals, in contrast...

The monotremes (egg laying mammals) represent the order of extant mammals most distantly related to humans. The platypus (Ornithorhynchus anatinus) is...

Sphenacodontidae Order Therapsida Evolution of mammals List of pelycosaurs Vertebrate paleontology Cope, E. D. (1878). "Descriptions of extinct Batrachia and Reptilia...

change. For instance, the evolution of mammal diversity in the past 100 million years has not required any major innovation. All of this diversity can be...

of the limbic system leads to a recognition that its presence "represents the history of the evolution of mammals and their distinctive family way of...

"mammal-like reptiles" is incorrect under the new definition of "reptile", so they are now referred to as stem mammals, and sometimes as proto-mammals...

on the evolution of mammals, and particularly for identifying the criteria by which proto-mammals (synapsids) should be classified as mammals. He is an...

develops within the parent). It is typical for mammals, but also occurs for some non-mammals. Mammals during pregnancy can have one or more gestations...

group of semiaquatic marine mammals which is closely related to an extinct group of pinnipeds, Enaliarctos. While support for the monophyly of pinnipeds...