Atopkin D.M., Shedko M.B., Sokolov S.G., Zhokhov A.E.
В издании Molecular Phylogenetics: contributions to the 3-d Moscow International Conference
Год: 2012 Страницы: 115
Genus Aspidogaster (Aspidogastrea) contains 14 species, parasitize on freshwater bivalves and some fishes, and distributed in Asia, Africa, Europe and North America. There are two species recognized in Russia, described firstly in Europe: A. limacoides Diesing, 1834 and A. conchicola Bare, 1827. The last one detected for Russian Far East, firstly described as A. amurensis Achmerov, 1956. In adjacent areas there are another two species, A. ijimai Kawamura, 1913, described from Japan and noted for China and A. chongqingensis Wei, Huang et Dai, 2001, which was noted for China. First attempt to genotype Aspidocaster species using molecular technique was made in 2010 by Chinese researches. There was pointed that A. limacoides, detected in China, was closely related with A. chongqingensis and the last one was recognized as synonym of A. limacoides. Also validity of A. ijimai in China was showed. However, there were no species from typical locations, included in analysis and some taxonomical problems still need to be resolved. In the present study first molecular data for A. limacoides and A. conchicola from european locations were obtained. Our results showed an obvious differentiation between specimens of A. limaciodes from Europe and China. A. limacoides therefore can not be recognized yet in Far East and China. A. chongqingensis (syn. A. limacoides) is a valid Chinese species. Further studies of morphology and life cycle of this species are needed. Specimens of A. conchicola from Europe, Russian Far East and China were in the same cluster and showed obvious correspondence between genetic differentiation and geographical distribution. This result possibly indicates of Far Eastern origin of A. conchicola fauna. However further investigations are needed to resolve this problem with regard to synonymy of A. conchicola and A. amurensis. Japanese species A. ijimae from Amur River was identical to A. ijimai from China. Thus it is a first notification of A . ijimai in Russia.
