The Evolution of Mammalian Characters

Kids, Natural World, Nonfiction, Reference & Language, Education & Teaching, Science & Nature, Science
Cover of the book The Evolution of Mammalian Characters by D. M. Kermack, Springer US
View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart
Author: D. M. Kermack ISBN: 9781468478174
Publisher: Springer US Publication: March 9, 2013
Imprint: Springer Language: English
Author: D. M. Kermack
ISBN: 9781468478174
Publisher: Springer US
Publication: March 9, 2013
Imprint: Springer
Language: English

This book is not intended to give a full and comprehensive account of the Mesozoic mammals, and nor is it intended as a handbook for research workers studying pre-Tertiary mammals. Our intention is to give an account of the origin and evolution of certain of the characters of the Mammalia. We have tried to portray the fossils we describe as the living animals they once were, not as dead bones. Our account ends with the end of the Lower Cretaceous, since by that time the major characters of the mammals had become established. There exist a number of characters which, at the present day, are confined to the Mammalia. These include: (1) a jaw articulation formed by the squamosal and the dentary; (2) a chain of three bones, malleus, incus and stapes connecting the tympanic membrane to the inner ear; (3) the presence of hair or fur; (4) the presence of milk-glands in the female; (5) the left aortic arch is the systemic arch; (6) the phalangeal formula in both manus and pes is 2.3.3.3.3; (7) some of the teeth have more than one root. Of these characters (1) or (2) are sufficient by themselves to define a mammal; characters (6) and (7) are known to have been already in existence in some of the mammal-like reptiles - the ancestors of the mammals.

View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart

This book is not intended to give a full and comprehensive account of the Mesozoic mammals, and nor is it intended as a handbook for research workers studying pre-Tertiary mammals. Our intention is to give an account of the origin and evolution of certain of the characters of the Mammalia. We have tried to portray the fossils we describe as the living animals they once were, not as dead bones. Our account ends with the end of the Lower Cretaceous, since by that time the major characters of the mammals had become established. There exist a number of characters which, at the present day, are confined to the Mammalia. These include: (1) a jaw articulation formed by the squamosal and the dentary; (2) a chain of three bones, malleus, incus and stapes connecting the tympanic membrane to the inner ear; (3) the presence of hair or fur; (4) the presence of milk-glands in the female; (5) the left aortic arch is the systemic arch; (6) the phalangeal formula in both manus and pes is 2.3.3.3.3; (7) some of the teeth have more than one root. Of these characters (1) or (2) are sufficient by themselves to define a mammal; characters (6) and (7) are known to have been already in existence in some of the mammal-like reptiles - the ancestors of the mammals.

More books from Springer US

Cover of the book Ultra-High-Temperature Processing of Milk and Milk Products by D. M. Kermack
Cover of the book Diastolic Relaxation of the Heart by D. M. Kermack
Cover of the book Quantified Societal Risk and Policy Making by D. M. Kermack
Cover of the book Advances in Cancer Screening by D. M. Kermack
Cover of the book Preventing HIV in Developing Countries by D. M. Kermack
Cover of the book New Methods of Food Preservation by D. M. Kermack
Cover of the book Urolithiasis Research by D. M. Kermack
Cover of the book Food Intolerance by D. M. Kermack
Cover of the book Isoenzymes by D. M. Kermack
Cover of the book Improving Democracy Through Constitutional Reform by D. M. Kermack
Cover of the book Assembly with Robots by D. M. Kermack
Cover of the book New Vaccines and Chemotherapy by D. M. Kermack
Cover of the book The Effect of Advertising and Display by D. M. Kermack
Cover of the book Dyslexia by D. M. Kermack
Cover of the book Cytokines and Growth Factors in Blood Transfusion by D. M. Kermack
We use our own "cookies" and third party cookies to improve services and to see statistical information. By using this website, you agree to our Privacy Policy