Mammal-like Reptiles

• Anapsids - Animals with a box-like skull without openings. This group includes the early reptiles of the Carboniferous and Permian periods (and to a limited extent the Triassic period), and includes animals such Scutosaurus. This group may also include turtles, however many scientists believe that turtles are actually descended from Diapsid reptiles which lost their skull openings.
  
  
• Diapsids - Reptiles with two temporal holes (fenestra) in their skulls, and their descendents. This group includes archosaurs (including crocodilians, dinosaur species and birds), as well as lepidosaurs such as lizards, snakes, and sphenodonts - even though many of these groups have lost one hole (lizards), both holes (snakes), or have heavily modified skulls (birds).
  
  
• Synapsids (also sometimes known as "Theropsids") - Animals with a single temporal opening (fenestra) in theirn skull behind each eye. This group includes many reptiles, known as "mammal-like reptiles", as well as mammals. Some examples of mammal-like reptiles include Cynodonts, Dicynodonts, Gorgonopsians (including Lystrosaurs), Dinocephalians like Estemmenosuchus, Moschops and Struthiocephalus, as well as Pelycosaurs like Dimetrodon, Edaphosaurus, Sphenacodon, and Varanosaurus.

Mammal-like Reptiles Timeline:

Mammal-like Reptiles were one of the main groups of amniotes, including the ancestors of all modern mammals, and lived between 324 and 100 million years ago

Related Information & Resources

• Prehistoric Animals - Prehistoric and Extinct Animals

Mammal-like Reptile Books

Mammal-Like Reptiles and the Origin of Mammals By T. S. Kemp Academic Pr Hardcover (363 pages) List Price: $139.00* Lowest Used Price: $76.37* In Stock* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: Mammal-Like Reptiles and the Origin of Mammals Manufacturer: Academic Pr ISBN: 0124041205 EAN: 9780124041202 Details: Hardcover Number of Pages: 363 Author: T. S. Kemp Click here for more information

Ecology and Biology of Mammal-Like Reptiles By Paul D. MacLean & E. Carol Roth Smithsonian Released: December 17th, 1986 Paperback (326 pages) Lowest Used Price: $29.96* In Stock* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: Ecology and Biology of Mammal-Like Reptiles Manufacturer: Smithsonian ISBN: 0874745195 EAN: 9780874745191 Details: Paperback Edition: First Edition Number of Pages: 326 Authors: Paul D. MacLean, Jan J. Roth, E. Carol Roth Publication Date: December 17th, 1986 Release Date: December 17th, 1986 Physical Description: Size: 11.0 inches by 8.25 inches by 0.75 inches Weight: 2.11202846996 Pounds Click here for more information

THE BOOK OF PREHISTORIC ANIMALS: WHERE THE EXTINCT REPTILES, MAMMAL-LIKE REPTILES, BIRDS, AND MAMMALS CAME FROM By Raymond L. (illustrated by Helene Carter) Ditmars J. B. Lippincott Company Hardcover (0 pages) Lowest Used Price: $98.88* In stock Usually ships within 3 to 4 days.* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: THE BOOK OF PREHISTORIC ANIMALS: WHERE THE EXTINCT REPTILES, MAMMAL-LIKE REPTILES, BIRDS, AND MAMMALS CAME FROM Manufacturer: J. B. Lippincott Company Details: Hardcover Edition: no statement of edition Number of Pages: 0 Author: Raymond L. (illustrated by Helene Carter) Ditmars Physical Description: Weight: 1.0 pounds Click here for more information

The mammal-like reptile Lycaenops (Bulletin of the American Museum of Natural History, v. 89, article 6) By Edwin Harris Colbert [American Museum of Natural History] Unknown Binding (404 pages) Lowest Used Price: $10.75* In Stock* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: The mammal-like reptile Lycaenops (Bulletin of the American Museum of Natural History, v. 89, article 6) Manufacturer: [American Museum of Natural History] Details: Product Category: Unknown Binding Number of Pages: 404 Author: Edwin Harris Colbert Click here for more information

What Do You Do with a Tail Like This? By Steve Jenkins Clarion Released: March 18th, 2008 Paperback (32 pages) List Price: $9.99* Lowest New Price: $7.10* In Stock* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: What Do You Do with a Tail Like This? Manufacturer: Clarion Books Brand: Clarion ISBN: 061899713X EAN: 9780618997138 PartNumber: 9780618997138 Details: Paperback Format: Picture Book Edition: Reprint Number of Pages: 32 Authors: Steve Jenkins, Robin Page Publication Date: March 18th, 2008 Release Date: March 18th, 2008 Physical Description: Size: 9.75 inches by 9.75 inches by 0.12 inches Weight: 2.314853751 pounds Click here for more information

Wildlife of Ecuador: A Photographic Field Guide to Birds, Mammals, Reptiles, and Amphibians (Wildlife Explorer Guides) By Andrés Vásquez Noboa Princeton University Press Released: May 30th, 2017 Paperback (288 pages) List Price: $32.00* Lowest New Price: $17.98* In Stock* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: Wildlife of Ecuador: A Photographic Field Guide to Birds, Mammals, Reptiles, and Amphibians (Wildlife Explorer Guides) Manufacturer: Princeton University Press Brand: Princeton University Press ISBN: 0691161364 EAN: 9780691161365 PartNumber: 9780691161365 Details: Paperback Edition: First Edition Number of Pages: 288 Author: Andrés Vásquez Noboa Publication Date: May 30th, 2017 Release Date: May 30th, 2017 Physical Description: Size: 8.5 inches by 6.0 inches by 1.0 inches Weight: 2.314853751 pounds Click here for more information

Ohio Wildlife Encyclopedia: An Illustrated Guide to Birds, Fish, Mammals, Reptiles, and Amphibians By Scott Shupe Skyhorse Released: May 29th, 2018 Hardcover (256 pages) List Price: $35.00* Lowest New Price: $19.04* In Stock* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: Ohio Wildlife Encyclopedia: An Illustrated Guide to Birds, Fish, Mammals, Reptiles, and Amphibians Manufacturer: Skyhorse Brand: Skyhorse ISBN: 151072883X EAN: 9781510728837 PartNumber: 9781510728837 Details: Hardcover Number of Pages: 256 Author: Scott Shupe Publication Date: May 29th, 2018 Release Date: May 29th, 2018 Physical Description: Size: 11.0 inches by 8.5 inches by 0.8 inches Weight: 2.40083403318 pounds Click here for more information

A MOUNTED SKELETON OF THE MAMMAL-LIKE REPTILE DICYNODON TIGRICEPS By Everett C Olson J Geol Pamphlet Lowest Used Price: $6.90* In Stock* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: A MOUNTED SKELETON OF THE MAMMAL-LIKE REPTILE DICYNODON TIGRICEPS Manufacturer: J Geol Details: Product Category: Pamphlet Author: Everett C Olson Click here for more information

On the Origin of the Mammal-like Reptiles Volume 1907 1907 [Leather Bound] By R Broom Generic Released: January 1st, 2017 Unknown Binding (21 pages) Lowest New Price: $59.99* Usually ships within 2 to 3 weeks* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: On the Origin of the Mammal-like Reptiles Volume 1907 1907 [Leather Bound] Manufacturer: Generic Details: Product Category: Unknown Binding Number of Pages: 21 Author: R Broom Publication Date: January 1st, 2017 Release Date: January 1st, 2017 Physical Description: Size: 0.08267716527 inches by 8.99999999082 inches by 5.7480314902 inches Click here for more information

The locomotor apparatus of certain primitive and mammal-like reptiles 1922 [Leather Bound] By Alfred Sherwood Romer Generic Released: January 1st, 2020 Leather Bound (140 pages) Lowest New Price: $76.27* Usually ships within 2 to 3 weeks* *(As of 04:25 Pacific 23 Apr 2025 More Info) Click Here Description: The locomotor apparatus of certain primitive and mammal-like reptiles 1922 [Leather Bound] Manufacturer: Generic Details: Product Category: Leather Bound Number of Pages: 140 Author: Alfred Sherwood Romer Publication Date: January 1st, 2020 Release Date: January 1st, 2020 Physical Description: Size: 0.5511811018 inches by 9.49999999031 inches by 7.74803148816 inches Click here for more information

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