Body shape differentiation among mitochondrial-DNA lineages of Zacco platypus and Opsariichthys bidens (Cyprinidae) from the Chang Jiang and Xi Jiang river drainage areas in southern China (In English)

摘要

In this study I examine body shape differences among mitochondrial-DNA lineages of two cyprinid species; Zacco platypus and Opsariichthys bidens across the Chang Jiang and Xi Jiang rivers in southern China. A recent description of the phylogenetic structure of these two species based on mitochondrial-DNA data suggested several lineages within these two taxa (Zacco A-D and Opsariichthys 1-5). A geometric morphometric technique was used to examine if these mitochondrial-DNA lineages differ in body shape. Three of the four mitochondrial-DNA lineages distinguished in Z. platypus were included in the body shape analysis. Results showed that two of the three comparisons between Z. platypus lineages differed in body shape. Three of the five lineages of O. bidens described by mitochondrial-DNA analysis were analyzed and the results showed that all three lineages differed in body shape. Hence the different mtDNA lineages are in a large part reflected in body shape differences among lineages, suggesting that the mitochondrial-DNA lineages might correspond to different species [Acta Zoologica Sinica 52(5): 948 – 953, 2006].