Download or read book Two New Oligocene Desmostylians and a Discussion of Tethytherian Systematics written by Daryl P. Domning and published by . This book was released on 1986 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new genus, comprising two new species of desmostylians, is described from marine Oligocene deposits of the Pacific Northwest. Behemotops proteus, new genus, new species, is based on an immature mandibular ramus and apparently associated skeletal fragments from the middle or (more likely) upper Oligocene lower part of the Pysht Formation of Clallam County, Washington. A related new species, Behemotops emlongi, is founded on a mandibular ramus of an old individual and a mandibular fragment with canine tusk from the uppermost Oligocene (early Arikareean equivalent) Yaquina Formation of Lincoln County, Oregon. The two new species are the most primitive known desmostylians and compare favorably with the primitive Eocene proboscideans Anthracobune and Moeritherium, and to the still more primitive tethythere Minchenella from the Paleocene of China.For many years the Desmostylia were widely regarded as members of the mammalian order Sirenia before being accepted as a taxon coordinate with the Sirenia and Proboscidea (Reinhart, 1953). On the basis of cladistic analysis we go a step further and regard the Desmostylia as more closely related to Proboscidea than to Sirenia because the Desmostylia and Proboscidea are interpreted herein to share a more recent common ancestor than either order does with the Sirenia. This analysis also suggests that the common ancestor of the Proboscidea and Desmostylia (but not the Sirenia) had suppressed P5 and the original last molar. These characters may be convergent with some other mammals. The Superorder Tokotheria McKenna, 1975, was originally thought to be characterized by loss of both P5 and M3. However, because early sirenians do not show these losses, they may have occurred independently in the common ancestor of proboscideans and desmostylians and in various other tokotheres.The late Paleocene genus Minchenella Zhang, 1980, from China, is a suitable candidate to be the common ancestor of both the Desmostylia and the Proboscidea. It possesses a small entoconid II on M3. The Eocene genus Lammidhania Gingerich, 1977, from Pakistan, and the late Paleocene and/or early Eocene Chinese and Mongolian phenacolophids had not acquired an entoconid II on M3 but are otherwise similar to Minchenella and the anthracobunids. The Asiatic occurrence of phenacolophids, Lammidhania, Minchenella, and anthracobunids suggests an Asian origin for the Proboscidea and is in accord with the exclusively Pacific distribution of the Desmostylia.We believe that desmostylians were amphibious herbivores that fed on marine algae and angiosperms, and that at least the earlier taxa depended to a large extent on plants exposed in the intertidal zone.
Download or read book Global Seagrass Research Methods written by F.T. Short and published by Elsevier. This book was released on 2001-11-06 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thorough and informative volume presents a set of detailed, globally applicable techniques for seagrass research.The book provides methods for all aspects of seagrass science from basic plant collection to statistical approaches and investigations of plant-animal interaction. The emphasis is on methods that are applicable in both developing and developed countries. The importance of seagrasses in coastal and near shore environments, and ultimately their contribution to the productivity of the world's oceans, has become increasingly recognised over the last 40 years.Seagrasses provide food for sea turtles, nearly 100 fish species, waterfowl and for the marine mammals the manatee and dugong. Seagrasses also support complex food webs by virtue of their physical structure and primary production and are well known for their role as breeding grounds and nurseries for important crustacean, finfish and shell fish populations. Seagrasses are the basis of an important detrital food chain. The plants filter nutrients and contaminants from the water, stabilise sediments and act as dampeners to wave action. Seagrasses rank with coral reefs and mangroves as some of the world's most productive coastal habitat and strong linkages among these habitats make the loss of seagrasses a contributing factor in the degradation of the world's oceans.Contributors from around the world provide up-to-date methods for comparable collection of ecological information from both temperate and tropical seagrass ecosystems.
Download or read book The Teeth of Mammalian Vertebrates written by Barry Berkovitz and published by Academic Press. This book was released on 2018-08-10 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Teeth of Mammalian Vertebrates is an important reference for researchers in dentistry, comparative morphology, anthropology, and vertebrate palaeontology, and those with an interest in exploring and understanding diversity. The book provides a comprehensive and informed analysis of mammalian dentitions and highlights the importance of teeth as drivers and mirrors of evolution and diversity." - Journal of Anatomy The Teeth of Mammalian Vertebrates presents a comprehensive survey of mammalian dentitions that is based on material gathered from museums and research workers from around the world. The teeth are major factors in the success of mammals, and knowledge of tooth form and function is essential in mammalian biology. Illustrated with high-quality color photographs of skulls and dentitions, together with X-rays, CT images and histology, this book reveals the tremendous variety of tooth form and structure in mammals. Written by two internationally-recognized experts in dental anatomy, the book provides an up-to-date account of how teeth are adapted to acquiring and processing food. With its companion volume, this book provides a complete survey of the teeth of vertebrates. It is the ideal resource for students and researchers in zoology, biology, anthropology, archaeology and dentistry. - Provides a comprehensive account of mammalian dentitions, together with helpful reading lists - Illustrated by 900 high-quality photographs, X-rays, CT scans and histological images from leading researchers and world class museum collection - Depicts lateral and occlusal views of the skull and dentition, which conveys a much greater level of morphological detail than line drawings - Contains clear-and-concise, up-to-date reviews of the structure and properties of dental tissues, especially the enamel and tooth support system, both of which play vital roles in the functioning of the mammalian dentition
Download or read book Ash flow Tuffs written by Charles Edward Chapin and published by Geological Society of America. This book was released on 1979 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seventy five Years of Mammalogy 1919 1994 written by Elmer C. Birney and published by . This book was released on 1994 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Mammals written by Annalisa Berta and published by Elsevier. This book was released on 2005-12-14 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: Berta and Sumich have succeeded yet again in creating superior marine reading! This book is a succinct yet comprehensive text devoted to the systematics, evolution, morphology, ecology, physiology, and behavior of marine mammals. The first edition, considered the leading text in the field, is required reading for all marine biologists concerned with marine mammals. Revisions include updates of citations, expansion of nearly every chapter and full color photographs. This title continues the tradition by fully expanding and updating nearly all chapters. - Comprehensive, up-to-date coverage of the biology of all marine mammals - Provides a phylogenetic framework that integrates phylogeny with behavior and ecology - Features chapter summaries, further readings, an appendix, glossary and an extensive bibliography - Exciting new color photographs and additional distribution maps
Download or read book Vertebrate Evolution written by Donald R. Prothero and published by CRC Press. This book was released on 2022-04-19 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first vertebrate animals appear in the fossil record over 520 million years ago. These lineages diversified and eventually crept ashore leading to further evolutionary divergence and the appearance of the familiar charismatic vertebrates of today. From the tiniest fishes, diminutive salamanders, and miniaturized lizards to gargantuan dinosaurs, enormous brontotheres, and immense whales, vertebrates have captured the imagination of the lay public as well as the most erudite academics. They are the among the best studied organisms. This book employs beautifully rendered illustrations of these diverse lineages along with informative text to document a rich evolutionary history. The prolific and best-selling author reveals much of the latest findings regarding the phylogenetic history of vertebrates without overwhelming the reader with pedantry and excessive jargon. Simultaneously, comprehensive and authoritative while being approachable and lucid, this book should appeal to both the scholar, the student, and the fossil enthusiast. Key Features Provides an up-to-date account of evolution of vertebrates Includes numerous beautiful color reconstructions of prehistoric vertebrates Describes extinct vertebrates and their evolutionary history Discusses and illustrates the first vertebrates, as well as familiar lineages of fishes, amphibians, reptiles, birds, and mammals Reviews mass extinctions and other important events in the diversification of vertebrates Related Titles Bard, J. Evolution: The Origins and Mechanisms of Diversity (ISBN 9780367357016) Böhmer, C., et al. Atlas of Terrestrial Mammal Limbs (ISBN 9781138705906) Diogo, R., et al. Muscles of Chordates: Development, Homologies, and Evolution (ISBN 9781138571167) Schweitzer, M. H., et al. Dinosaurs: How We Know What We Know (ISBN 9780367563813)
Download or read book The Phytosauria written by James Howard McGregor and published by . This book was released on 1906 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Man Beast Revisited written by Michael H. Robinson and published by . This book was released on 1991 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prehistoric Life written by Bruce S. Lieberman and published by John Wiley & Sons. This book was released on 2010-03-22 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prehistoric life is the archive of evolution preserved in the fossil record. This book focuses on the meaning and significance of that archive and is designed for introductory college science students, including non-science majors, enrolled in survey courses emphasizing paleontology, geology and biology. From the origins of animals to the evolution of rap music, from ancient mass extinctions to the current biodiversity crisis, and from the Snowball Earth to present day climate change this book covers it, with an eye towards showing how past life on Earth puts the modern world into its proper context. The history of life and the patterns and processes of evolution are especially emphasized, as are the interconnections between our planet, its climate system, and its varied life forms. The book does not just describe the history of life, but uses actual examples from life’s history to illustrate important concepts and theories.
Download or read book Tooth Enamel Microstructure written by W. von Koenigswald and published by CRC Press. This book was released on 2020-09-10 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enamel, the shiny material covering the teeth of vertebrates is the hardest tissue the vertebrate body can produce and one of the most impressive products of biomineralization. This hard tissue is closely related to feeding, the first part in the energy intake process so basic to vertebrate life. Enamel has a complex internal microstructure full of phylogenetic and biomechanic information. Topics covered: Ontogeny; Crystallite level; Prism level; Enamel type level; Schmelzmuster level; Dentition level; Evolution; Biomechanical level; Glossary.
Download or read book American Traditions in Watercolor written by Worcester Art Museum and published by Abbeville Press. This book was released on 1987 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shows more than sixty watercolors by various Amerian artists, describes the background of each work, and discusses the technique of Homer and Sargent
Download or read book Omphalos written by Philip Henry Gosse and published by . This book was released on 1857 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PLAINS INDIAN SCULPTURE PB written by John Canfield Ewers and published by Smithsonian Books (DC). This book was released on 1986-07-17 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Shows examples of pipes, effigies, war clubs, bowls, spoons, and whistles, discusses themes and carving techniques, and looks at the place of these objects in the Indians' culture"--Amazon.com.
Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1989 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Central Plains Prehistory written by Waldo Rudolph Wedel and published by . This book was released on 1986 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
