Thomomys umbrinus pullus Hall and Villa, 1948

CASTRO-CAMPILLO, ALONDRA & RAMÍREZ-PULIDO, JOSÉ, 2000, Systematics of the Smooth-Toothed Pocket Gopher, Thomomys umbrinus, in the Mexican Transvolcanic Belt, American Museum Novitates 3297, pp. 1-38 : 33

Thomomys umbrinus pullus Hall and Villa

1948. Thomomys umbrinus pullus Hall and Villa, Univ. Kansas Publ. Mus. Nat. Hist. 1: 251, type locality: 5 mi S Pátzcuaro, 7,800 ft, Michoacán. GENERAL DISTRIBUTION: Known only from the vicinity of type locality.

ACKNOWLEDGMENTS

Several colleagues and friends participated in some phase of this research. To all of them, we extend our most sincere and deep appreciation.

Dr. Michael Smolen (Texas A&M University) made valuable suggestions at the beginning of this study. Dr. Robert D. Owen generously allowed ACC to compute the statistical analyses in his Texas Tech Univ. laboratory and made interesting comments to the research. M. S. Rosa Obdulia González-Robles also made helpful comments on the interpretation of the statistical results .

Dr. Margaret Smith (UC Berkeley) helped to clear up some points and M. S. Ticul Alvarez (ENCB, IPN), brought out some aspects that permitted a better understanding of the problem. Drs. Joaquin Arroyo-Cabrales (INAH), Bernardo Villa (IBUNAM), Ismael Ferrusquía-Villafranca (Inst. Geol., UNAM), Mary Ellen Holden (AMNH), and Sydney Anderson (AMNH) gave us some literature references that enriched the study. We thank Eric M. Brothers for editing the figures. A thorough revision of the manuscript by Drs. James Patton and Sydney Anderson together with a third anonymous reviewer undoubtedly contributed to a more succinct and more understandable final version of the paper.

A careful examination of specimens was made possible by the kindness and hospitality of several curators: M. S. Ticul Alvarez at CB; Drs. Don Wilson, Michael Carleton, Richard Thorington, and other members of the staff at USNM; Drs. Guy Musser and Sydney Anderson at AMNH; Dr. Robert Timm at KU; Dr. George Baumgardner at TCWC, and Dr. Stephen L. Williams at TTU.

Technicians Juan Patiño-Rodríguez and Benjamin Vieyra-Rosas collected the specimens in the field and were helped by several students during the three years of fieldwork. Hugo Martínez-Paz, Elsa González, Beatriz Gutiérrez, and Claudia Aguilar helped us with word-processing of the Spanish version of the manuscript. Mr. Fernando Vega made the figures. Mr. Antonio H. Cabrera took care of an early draft of English version.

This research was conducted to satisfy the Ph.D. dissertation requirements of ACC. It was financed by Consejo Nacional de Ciencia y Tecnología (1253-N9203 and 400200- 5-R29117N) and Secretaría de Educación Pública (93-01-09-002-177, 94-01-09-002- 248) .