SYSTEMATICS AND BIOGEOGRAPHY OF BORNEAN GECKOS OF THE GENUS CNEMASPISSTRAUCH, 1887 (SAURIA, GEKKONIDAE), WITH THE DESCRIPTION OF A NEW SPECIES

Three species of the gekkonid genus c7nernasCis, one of them new, are shown to occur on Borneo. The ranges of the species appear to hug the north-western coast of Borneo, all species being recorded from Sarawak State, East Malaysia. Such a distribution is similar to that reported for a lineage of the Dipterocarpaceae, with affinities in peninsular Malaya and the Rhiau Archipelago. It ic; thought that the present day distribution of the gekkonids may be influenced by the drainage of the ancient river basins of Sundaland which presumably stopped their disp ersal into central and eastern Borneo.