Are Acila divaricata and Acila mirabilis One Species or Two Distinct Species? Evidence from COI Mitochondrial DNA  

作　　者：ZHANG Junlong SHI Huafeng XU Fengshan SHA Zhongli 

机构地区：[1]Institute of Oceanology,Chinese Academy of Sciences

出　　处：《Journal of Ocean University of China》2014年第2期283-289,共7页中国海洋大学学报（英文版）

基　　金：supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (No.KSCX2-YW-N-0807);the External Cooperation Program of the Chinese Academy of Sciences (No.GJHZ200808);the Special Program for Key Basic Research of the Ministry of Science and Technology of China (No.2006 FY110500);IOCAS funding (Nos.2012IO060102, 2012IO060104)

摘　　要：Acila divaricata （Hinds, 1843） and A. mirabilis （Adams and Reeve, 1850） are common benthic bivalves in China. A number of researchers have proposed that the latter species is a junior synonym of the former species. Because of morphological similarities, it is difficult to distinguish these two species based on visual examination only. For better understanding of their taxon-omy, the mitochondrial CO1 gene fragments of five individuals of A. divaricata from the East China Sea and six individuals of A. mirabilis from the Yellow Sea were sequenced in this study. The phylogenetic relationships of the obtained COI sequences, together with nineteen sequences of three species of the genus Nucula, were analyzed. The pairwise intra- and inter-specific distances for the CO1 sequences ranged from 0.002 to 0.017 and from 0.128 to 0.134, respectively, and no overlap was found. Phylogenetically, A. divaricata and A. mirabilis form distinct clades and cluster into a sister to all other Nucula species. The results indicated that A. di-varicata and A. mirabilis are two distinct species. The differences in the morphology and distribution between the two species were briefly discussed.Acila divaricata(Hinds, 1843) and A. mirabilis(Adams and Reeve, 1850) are common benthic bivalves in China. A number of researchers have proposed that the latter species is a junior synonym of the former species. Because of morphological similarities, it is difficult to distinguish these two species based on visual examination only. For better understanding of their taxonomy, the mitochondrial COI gene fragments of five individuals of A. divaricata from the East China Sea and six individuals of A. mirabilis from the Yellow Sea were sequenced in this study. The phylogenetic relationships of the obtained COI sequences, together with nineteen sequences of three species of the genus Nucula, were analyzed. The pairwise intra- and inter-specific distances for the COI sequences ranged from 0.002 to 0.017 and from 0.128 to 0.134, respectively, and no overlap was found. Phylogenetically, A. divaricata and A. mirabilis form distinct clades and cluster into a sister to all other Nucula species. The results indicated that A. divaricata and A. mirabilis are two distinct species. The differences in the morphology and distribution between the two species were briefly discussed.

关 键 词：cytochrome oxidase I molecular taxonomy BIVALVIA Acila distribution 

分 类 号：S917.4[农业科学—水产科学]