Produced by Chris Curnow, Tom Cosmas, Joseph Cooper and the Online Distributed Proofreading Team at http://www.pgdp.net UNIVERSITY OF KANSAS MUSEUM OF NATURAL HISTORY Vol. 20, No. 1, pp. 1-45, 22 figs. February 20, 1970 A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope BY JOHN D. LYNCH UNIVERSITY OF KANSAS LAWRENCE 1970 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors of this number: Frank B. Cross, Philip S. Humphrey, William E. Duellman Volume 20, No. 1, pp. 1-45, 22 figs. Published February 20, 1970 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY THE UNIVERSITY OF KANSAS PRINTING SERVICE LAWRENCE, KANSAS 1970 A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope BY JOHN D. LYNCH INTRODUCTION Cope (1878) proposed the genus _Syrrhophus_ for a medium-sized leptodactylid frog from central Texas; in the ensuing 75 years the genus was expanded to include a heterogeneous group of frogs ranging from Texas to Peru. Taylor (1952) and Firschein (1954) limited the genus to several species of frogs occurring in Guatemala, Mexico, and Texas. Lynch (1968) provided a definition of the previously loosely-defined genus. With the exception of Taylor (1952), who treated the Costa Rican species, none of these authors dealt with the present status of the nineteen species erroneously assigned to _Syrrhophus_. These species are listed in Tables 1 and 2 with the name currently applied. Some of them are new combinations and their justifications will be published elsewhere. Gorham (1966) is the most recent author to include South American species in the genus _Syrrhophus_. Smith and Taylor (1948) recognized two species groups of the genus in Mexico, an eastern and a western group (here termed complexes for purposes of discussion), separated on the basis of the number of palmar (metacarpal) tubercles (three palmar tubercles in the members of the eastern complex and two in those of the western complex). Duellman (1958) reviewed the species of the genus occurring in western Mexico and concluded that there were five species (two polytypic). Dixon and Webb (1966) described an additional species from Jalisco, Mexico. The distributions of some species have been extended, but otherwise the western complex of species remains unchanged since Duellman's review.