In order to study the law of sexual dimorphism of Laudakia stoliczkana,12 morphological indices were mea-sured by 24 adult specimens collected from Wensu County,Xinjiang Uygur Autonomous Region.Independent sample t-test and analysis of covariance were used.Based on the geometric morphometry,head lateral of L.stoliczkana were stud-ied.The results showed that male L.stoliczkana did not differ significantly in snout-vent length from females,and the head,appendage and tail length did not differ significantly between males and females.The axilla-groin of female L.stolic-zkana were significantly longer than that of males(P<0.05).Geometric morphometry analysis revealed that the geometry head lateral did not differ significantly between males and females.This study supports that fecundity selection is the main cause of sexual dimorphism in L.stoliczkana.Female L.stoliczkana tends to reduce the probability of offsprings being pre-dated by increasing the number of eggs with a larger axilla-groin.
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