THE NORTHWARD SHIFT IN CHINA WATERS OF THREE ELLOBIID SPECIES FOUND IN THE YELLOW SEA(GASTROPODA,ELLOBIIDAE)
During investigations on the intertidal zone of the Yellow Sea(2020～2023),several ellobiid gastropods were sampled.Morphological observations of the specimens suggest that they represent three species,including Ellobium chinense(Pfeiffer,1855)and Pythia cecillii(R.A.Philippi,1847)from Yancheng in Jiangsu,and Laemodonta exaratoides Kawabe,1992 from Qingdao in Shandong,and Dalian in Liaoning.Of them,Laemodonta exaratoides Kawabe,1992 is a species new to China.In this study,the specimens were described and illustrated based on shell morphology.The systematic position of Laemodonta exaratoides Kawabe,1992 was clarified by reconstructing the Bayesian phylogenetic tree based on two mitochondrial(COI,16S rRNA)and nuclear(H3)genes.Ellobiidae is a group distributed mainly in the tropical and subtropical seas.In China,only Ellobium chinense was reported to spread northward to the southern Yellow Sea.The three ellobiid species recorded in this study shows that the number of ellobiids in the Yellow Sea is constantly increasing and their distribution range has significantly expanded northward.This phenomenon may be related to the continued increase in the seawater temperature of the Yellow Sea caused by global warming.The results expand diversity knowledge of molluscs from Chinese waters,and provide new information for better understanding of the distribution expansion of molluscs under the background of climate change.
万方数据
维普
