Occasional Papers of the Museum of Zoology University of Michigan Annarbor, Miciiigan
OCCASIONAL PAPERS OF THE MUSEUM OF ZOOLOGY UNIVERSITY OF MICHIGAN ANNARBOR, MICIIIGAN THE SPHAERODACTYLUS (SAURIA: GEKKONIDAE) OF MIDDLE AMERICA INTRODUCTION Splzaerodactylus is one of the most speciose genera of gekkonid lizards. It is confined to the Neotropics, and the majority of its divers- ity is found in the West Indies where approximately 69 species, and an additional 74 subspecies, have been well-documented (King, 1962; Schwartz, 1964, 1966, 1968, 1977; Schwartz and Garrido, 1981; Schwartz and Graham, 1980; Schwartz and Thomas, 1964, 1975, 1983; Schwartz, Thomas, and Ober, 1978; Thomas, 1964, 1975; Thomas and Schwartz, 1966a,b). The mainland radiation was poorly understood until 1982 when Harris published his revision of South American sphaerodactyls. No comprehensive study has yet been at- tempted for Middle American forms, and it remains the last area of taxonomic confusion in the genus. The number of taxa currently recognized in Middle America is not great (10 species according to Peters and Donoso-Barros [1970], Schwartz [1973], and Smith and Taylor [1950b, 19661); however, their geographic distribution and variation, and status as species or subspecies remain to be con- vincingly demonstrated. The Middle American sphaerodactyl fauna appears to be divisible into two geographical-historical components. Most of the taxa may be thought of as belonging to an endemic group because the sister taxon *Division of Amphibians and Reptiles, Museum of Zoology, The University of Michi- gan, Ann Arbor, Michigan 48109-1079 U.S.A. 2 Harris and Kluge Orc. P~I~P):) of each species also exhibits a mainland distribution. Only two, S. arg-us Gosse (1850) and S.
[Show full text]