Ancient Cretaceous Crocodilians: From Kostensuchus to Deinosuchus: Decoding Fossil Evidence and Extinction Dynamics

By James L. Hogue

Ancient Cretaceous Crocodilians looks into the remarkable discoveries of Kostensuchus atrox and Deinosuchus, two formidable reptiles that dominated their ecosystems millions of years ago. Drawing on paleontological findings from Argentina's Chorrillo Formation and North America's Western Interior Seaway, this book examines the evolutionary, ecological, and morphological complexities of these ancient hypercarnivores. Through analysis, it uncovers how Kostensuchus, a massive crocodyliform with serrated teeth and a robust skull, hunted dinosaurs in the humid floodplains of Patagonia, while Deinosuchus, with its saltwater tolerance, thrived across coastal marshes. The narrative brings together fossil evidence, phylogenetic insights, and paleoecological reconstructions to paint a vivid picture of their predatory dominance and eventual extinction.

The book begins with the excavation of Kostensuchus, detailing its near-complete skeleton and its role as an apex predator in a diverse Cretaceous habitat. It examines the creature's unique morphology, from its broad snout to its powerful limbs, and contrasts its terrestrial hunting style with the semiaquatic adaptations of related species. Parallel to this, the text reexamines Deinosuchus, revealing how its salt glands enabled it to navigate vast seaways, challenging prior classifications as an alligator relative. Through comparative analysis, the book highlights convergent evolution among crocodilian lineages, demonstrating how these reptiles independently evolved into giant forms across diverse climates. It also investigates the paleoecology of their habitats, from seasonally humid floodplains to nutrient-poor wetlands, and addresses the factors contributing to their survival or demise during the Cretaceous mass extinction.

This book offers a comprehensive exploration of these ancient predators' lives and legacies. It bridges paleontology with modern crocodilian studies, providing fresh perspectives on evolutionary resilience and ecological adaptability.

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• Format: Paperback
• Language: English
• ISBN: B0FPXVD3GV
• ISBN13: 9798263913977
• Release Date: September 2025
• Publisher: Independently Published
• Length: 84 Pages
• Weight: 0.27 lbs.
• Dimensions: 0.2" x 6.0" x 9.0"