. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Flores-Víllela, Smith & Chiszar: The History of Herpetological Exploration in Mexico 323. Fig. 7: Routes traveled by Grismer, 1975-1994, collecting herpetozoans in Baja California. From Grismer (1994). Re- produced with permission of the author. Coahuila This state has received little attention with few excep- tions, as for example in the Cuatro Ciénegas Basin and the southern and northern borders. No over-all summary of work there has appeared. Perhaps the
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Flores-Víllela, Smith & Chiszar: The History of Herpetological Exploration in Mexico 323. Fig. 7: Routes traveled by Grismer, 1975-1994, collecting herpetozoans in Baja California. From Grismer (1994). Re- produced with permission of the author. Coahuila This state has received little attention with few excep- tions, as for example in the Cuatro Ciénegas Basin and the southern and northern borders. No over-all summary of work there has appeared. Perhaps the earliest major study was the report by Schmidt & Owens (1944) on the collections of Ernest G. Marsh in 1938-1939 in northern Coahuila. Fugler & Webb (1956) reported the collections by a field party from the University of Kan- sas at two localities in southern and central Coahuila, near Parras and Carolina Canyon, east of San Antonio de las Alazanas. More recently Ernest A. Liner and col- leagues have collected in northern Coahuila, particularly in the vicinity of Melchor Múzquiz, Boquillas del Car- mén, La Linda, Cuesta de Encantada (these last three on the Sierra del Carmén), and the Serranías del ButTO (Liner et al. 1977, 1993). To our knowledge no local group is making any effort to explore the herpetozoans of that state. However, Arturo Contreras Arquieta and David Lazcano of Universidad Autónoma de Nuevo León are making collections in some parts of Coahuila. The many widely isolated mountain ranges and sand dunes of the state may well harbor more unknown, endemic taxa than any other area of the country. Nuevo León This is probably the best-explored of the northern bor- der states of the country. Many students from the Uni- versidad Autónoma de Nuevo León have explored the entire state. Aseff-MartÍNEZ (1967) reported explora- tions in the central part of the state; Velasco-Torres (1970), explorations in the northern part of the state; and TreviÑO
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