J. Alan Holman – författare

This book documents the temporal and geographic distribution of amphibians and reptiles during the Pleistocene of North America. The identification of fossils, the range of adjustments and extinction patterns for these species are treated. The focus of the book is on the unique relationship of the North American herpetofauna to the events of the Pleistocene.

The Pleistocene epoch or Ice Age, an extended period of advancing and retreating ice sheets, is characterized by striking climatic oscillations and sea level fluctuations. This age saw the rise and spread of humans and a great extinction of large mammals by the end of the epoch; in fact, the world today is essentially the product of dramatic changes that took place in the Pleistocene. This book, a companion to the author's Pleistocene Amphibians and Reptiles in North America, discusses the Pleistocene amphibians and reptiles in Britain and the European continent eastward through present-day Poland, the Czech Republic, Hungary, the Yugoslavian republics, and Greece. The book begins with a general discussion of the Pleistocene in Britain and Europe with an emphasis on regional terms used to define Pleistocene chronological events. Next, a look at the pre-Pleistocene herpetofauna of the study area sets the stage for a discussion of Pleistocene herpetofauna. A significant section of the book consists of a "bestiary," a series of annotated taxonomic accounts of Pleistocene herpetological taxa from the region. Following this is the interpretive section, beginning with a discussion of herpetological species as paleoenvironmental indicators and continuing with an analysis of herpetological population adjustments to Pleistocene events in Britain and Europe, and then with a discussion of extinction patterns in the region. Finally, the author compares Pleistocene herpetological events in Europe with those in North America. This volume and its companion together provide an up-to-date and comprehensive review of Pleistocene herpetofaunas across a significant portion of the Northern Hemisphere.

Despite being among the most versatile and interesting amphibians in North America, frogs and toads (otherwise known as anurans) have not traditionally received enough attention from science. But now, with the population of modern frogs and toads dwindling at an alarming rate, author J. Alan Holman brings together the latest research and findings about ancient anurans, expanding the world's knowledge about these fascinating creatures while there is still time to understand and save them.Comprehensive and lavishly illustrated, this essential guide provides a general account of the fossil record, a detailed account of individual anuran bones used in paleontological studies, and an epoch-by-epoch discussion of Mesozoic, Tertiary, and Pleistocene anurans and the changes they experienced throughout their evolution. The modern ranges and characteristics, ecological attributes, and diagnostic skeletal elements of fossil taxa still living are also described. A thorough overview of anuran fossil history, biology, and anatomy, Fossil Frogs and Toads of North America is an informative, accessible book for anyone interested in frogs and toads and their evolution into the animals we know today.

Call them "mudpuppies," "hellbenders," or "mud eels," salamanders are puzzling animals to most people. They come in forms that look like flattened fish with legs, like eels, like slimy lizards, or like lizards with toad-like skins. Their life history imitates the ancient evolutionary transition from aquatic to terrestrial vertebrates, though several groups remain permanently aquatic. Until now, no one has written about their ancient ancestors. Holman details the process of the identification and interpretation of the fossils. He presents a detailed systematic account of the known fossil salamanders of North America, illustrates and discusses the extinct salamanders, re-diagnosing or redescribing some on the basis of additional information and fossil material. He also gives the modern characteristics, ecological attributes, and modern ranges of the fossil taxa that are still living. The book begins with an overview of the Caudata and describes their early evolution. Then follow the systematic and chronological accounts of the salamanders. The book concludes with a discussion of the study of fossil salamanders as it relates to the development of a realistic phylogeny and classification of the group.

Today, Michigan is home to many different animals and plants. Yet nearly 12,000 years ago it was home to very different kinds of animals and flora. Huge mastodons and mammoths roamed through southern Michigan. Whales, walruses, and giant rodents swam in the lakes, and shaggy musk oxen grazed in the woodlands. Now, 2000 years later, all but their fossils are gone. Ancient Life of the Great Lakes Basin provides a one-of-a-kind look at ancient life in the Great Lakes. Written for the layperson and for the professional with biological or geological interest in the Great Lakes region, the book describes most of the common fossils found in this region. Detailed illustrations help identify many of the fossilized organisms that can be found today. Among the most interesting illustrations presented in the book are Gijsbert van Frankenhuyzen's conceptions of what the fossilized creatures may have looked like when they were alive. In addition, color illustrations by van Frankenhuyzen depict spectacular scenes of ancient life in the Great Lakes area. The book begins with a brief review of biological and geological principles and then offers a framework for the study of the fossil record. Methods of collection, preservation and maintenance of fossils are also presented. Throughout the book, common fossils found today embedded in rocks and other solid matter are emphasized.