Download or read book Early Permian Footprints and Facies written by Spencer G. Lucas and published by New Mexico Museum of Natural History and Science. This book was released on 1995 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evolution of Living Organisms written by Pierre-P. Grassé and published by Academic Press. This book was released on 2013-09-03 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evolution of Living Organisms: Evidence for a New Theory of Transformation discusses traditional interpretations of evolution with a new assumption. The book presents a rational and general account of real evolutionary phenomena based on paleontology and molecular biological data. The text reviews biological evolution from the simple to the complex or progressive and regressive evolution. The author explains the appearance of types of organization from Captorhinomorphs to Pelycosaurs to the Theriodonts— from which the mammals arose. He also explains that in the evolution to mammals, the transformation of the Theriodonts concerned only the skeleton, muscles, dentition, and not the brain. He cites the case of the Perissodactyls as an example. The author also asserts that paleontology and molecular biology can explain the mechanism of evolution without even detailing the causes of orientations of lineages, of the finalities of structures, of living functions, and of cycles. But this approach will involve metaphysics. This book can be appreciated by anthropologists, researcher and scientists involved in zoology, paleontology, genetics and biochemistry.

Download or read book Reptilian Lungs written by Steven F. Perry and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph has attempted to bring together morphological and physiological studies of reptilian lungs, to analyze the nature of the resulting correlations, and to risk some speculations regarding the evolution of reptilian lung structure. Central to this work is the morphometric evaluation of the lungs in two species of lizard: "the teju (Tupinambis nigropunctatus Spix) and the savanna monitor (Varanus exanthema ticus [Bosc]) which is presented here for the first time. These two species are similar in body form, and both are diurnally active predators, but their lungs are of basic ally different structural types. The teju possesses relatively small, single-chambered (unicameral) lungs in which the homeycomb-like (faveolar) parenchyma is more or less evenly distributed along their length. In the monitor the lungs are large and many-chambered (multicameral), the individual chambers connecting to an unbranched, intrapulmonary bronchus. The parenchyma is in the form of shallow cubicles (ediculae), which are elaborated on the intercameral septa. The parenchyma is heterogeneously distributed within the lungs, tending to be most concentrated near the intrapulmonary bronchus and the middle third of the lung length. The ventral and caudal portions of these lungs are thin-walled and highly flexible. In both species those portions of the lungs which are most exposed to air convection possess dense capillary nets which almost completely cover both sides of the parenchymal partitions. In more distal regions of the parenchy ma or of the lung, the intercapillary spaces become larger, creating a pseudo-single capillary net.

Download or read book Turtles as Hopeful Monsters written by Olivier Rieppel and published by Indiana University Press. This book was released on 2017-03-13 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Where do turtles hail from? Why and how did they acquire shells? These questions have spurred heated debate and intense research for more than two hundred years. Brilliantly weaving evidence from the latest paleontological discoveries with an accessible, incisive look at different theories of biological evolution and their proponents, Turtles as Hopeful Monsters tells the fascinating evolutionary story of the shelled reptiles. Paleontologist Olivier Rieppel traces the evolution of turtles from over 220 million years ago, examining closely the relationship of turtles to other reptiles and charting the development of the shell. Turtle issues fuel a debate between proponents of gradual evolutionary change and authors favoring change through bursts and leaps of macromutation. The first book-length popular history of its type, this indispensable resource is an engaging read for all those fascinated by this ubiquitous and uniquely shaped reptile.

Download or read book Bibliography of Fossil Vertebrates 1928 1933 written by Charles Lewis Camp and published by . This book was released on 1940 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fossil Vertebrates in the American Museum of Natural History written by American Museum of Natural History. Dept. of Vertebrate Palaeontology and published by . This book was released on 1922 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fossilium catalogus written by and published by . This book was released on 1961 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Permian of Central New Mexico written by Spencer G. Lucas and published by New Mexico Museum of Natural History and Science. This book was released on 2005 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Captorhinomorpha written by Everett Claire Olson and published by . This book was released on 1954 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multilingual Thesaurus of Geosciences written by J. Gravesteijn and published by . This book was released on 1995 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fossil Vertebrates in the American Museum of Natural History written by American Museum of Natural History. Department of Vertebrate Paleontology and published by . This book was released on 1922 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Terrestrial Environment and the Origin of Land Vertebrates written by Alec L. Panchen and published by Academic Press. This book was released on 1980 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Invasions of the Land written by Malcolm S. Gordon and published by Columbia University Press. This book was released on 1994-03-15 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasions of the Land

Download or read book Dinosaurs written by David E. Fastovsky and published by Cambridge University Press. This book was released on 2021-07-01 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ideal textbook for non-science majors, this lively and engaging introduction encourages students to ask questions, assess data critically and think like a scientist. Building on the success of previous editions, Dinosaurs has been thoroughly updated to include new discoveries in the field, such as the toothed bird specimens found in China and recent discoveries of dinosaur soft anatomy. Illustrations by leading paleontological illustrator John Sibbick and new, carefully-chosen photographs, clearly show how dinosaurs looked, lived and their role in Earth history. Making science accessible and relevant through clear explanations and extensive illustrations, the text guides students through the dinosaur groups, emphasizing scientific concepts rather than presenting endless facts. Grounded in the common language of modern evolutionary biology – phylogenetic systematics – students learn to think about dinosaurs the way that professional paleontologists do.

Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 2002 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Jurassic Ammonite Fauna of Cuba written by Marjorie O'Connell and published by . This book was released on 1920 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin of the American Museum of Natural History written by American Museum of Natural History and published by . This book was released on 1922 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprises articles on geology, paleontology, mammalogy, ornithology, entomology, and anthropology.