Chapter 1 Why Is It Important to Continue Studying the Anatomy, Physiology, Sensory Ecology, and Evolution of Howler Monkeys?

Chapter 2 Fossil Alouattines and the Origins of Alouatta : Craniodental Diversity and Interrelationships

Chapter 3 The Taxonomy of Howler Monkeys: Integrating Old and New Knowledge from Morphological and Genetic Studies

Chapter 4 Cytogenetics of Howler Monkeys

Chapter 5 Hybridization in Howler Monkeys: Current Understanding and Future Directions

Chapter 6 Morphology of Howler Monkeys: A Review and Quantitative Analyses

Chapter 7 Hematology and Serum Biochemistry in Wild Howler Monkeys

Chapter 8 Endocrinology of Howler Monkeys: Review and Directions for Future Research

Chapter 9 The Howler Monkey as a Model for Exploring Host-Gut Microbiota Interactions in Primates

Chapter 11 An Ontogenetic Framework for Alouatta : Infant Development and Evaluating Models of Life History

Chapter 12 The Sensory Systems of Alouatta : Evolution with an Eye to Ecology

Chapter 13 Production of Loud and Quiet Calls in Howler Monkeys

Chapter 14 Function of Loud Calls in Howler Monkeys

Chapter 15 New Challenges in the Study of Howler Monkey Anatomy, Physiology, Sensory Ecology, and Evolution: Where We Are and Where We Need to Go?