: Amphibians and Reptiles of the Rainforests of Southern El Petén Guatemala by Duellman William Edward - Amphibians Guatemala Petén (Department); Reptiles Guatemala Petén (Department) Animal; Animals-Wild-Reptiles and Amphibians

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PAGE INTRODUCTION 207 Acknowledgments 208

DESCRIPTION OF AREA 208 Physiography 209 Climate 209 Vegetation 209

GAZETTEER 210

THE HERPETOFAUNA OF THE RAINFOREST 211 Composition of the Fauna 212 Ecology of the Herpetofauna 212 Relationships of the Fauna 217

ACCOUNTS OF SPECIES 218

HYPOTHETICAL LIST OF SPECIES 246

SUMMARY 247

LITERATURE CITED 247

INTRODUCTION

Early in 1960 an unusual opportunity arose to carry on biological field work in the midst of virgin rainforest in southern El Pet?n, Guatemala. At that time the Ohio Oil Company of Guatemala had an air strip and camp at Chinaj?, from which place the company was constructing a road northward through the forest. In mid-February, 1960, J. Knox Jones, Jr. and I flew into El Pet?n to collect and study mammals, reptiles, and amphibians. While enjoying the comforts of the fine field camp at Chinaj?, we worked in the surrounding forest and availed ourselves of the opportunity to be on hand when the road crews were cutting the tall trees in the forest, thereby bringing to the ground many interesting specimens of the arboreal fauna. We stayed at Chinaj? until late March, with the exception of a week spent at Toocog, another camp of the Ohio Oil Company located 15 kilometers southeast of La Libertad and on the edge of the savanna. Thus, at Toocog we were able to work both in the forest and on the savanna. In the summer of 1960, John Wellman accompanied me to El Pet?n for two weeks in June and July. Most of our time was spent at Chinaj?, but a few days were spent at Toocog and other localities in south-central El Pet?n.

Acknowledgments

I am grateful to L. C. Stuart of the University of Michigan, who made the initial arrangements for our work in El Pet?n, aided me in the identification of certain specimens, and helped in the preparation of this report. J. Knox Jones, Jr. and John Wellman were able field companions, who added greatly to the number of specimens in the collection. In Guatemala, Clark M. Shimeall and Harold Hoopman of the Ohio Oil Company of Guatemala made available to us the facilities of the company's camps at Chinaj? and Toocog. Alberto Alcain and Luis Escaler welcomed us at Chinaj? and gave us every possible assistance. Juan Monteras and Antonio Alda?a made our stay at Toocog enjoyable and profitable. During our visits to southern El Pet?n, Julio Bol?n C. worked for us as a collector, and between March and June he collected and saved many valuable specimens; his knowledge of the forest and its inhabitants was a great asset to our work. Jorge A. Ibarra, Director of the Museo Nacional de Historia Natural in Guatemala assisted us in obtaining necessary permits and extended other kindnesses. To all of these people I am indebted for the essential parts that they played in the completion of this study.

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