Romanenko L N, Shigin A A
Parazitologiia. 1977 Nov-Dec;11(6):530-6.
The chromosomal apparatus of three species of trematodes of Diplostomum (D. spathaceum, D. indistinctum, D. mergi) and one species Tylodelphys (T. clavata) is described. It has been suggested that karyological investigations can be used for taxonomic purposes. The opinion has been expressed that the number of chromosomes in the karyotype of these trematodes plays no taxonomic role. Of great taxonomic significance are the size and morphology of chromosomes. Differences in karyotypes of trematodes belonging to different species and genera were revealed by these characters. The absence of close dependence between morphology of adult and specific peculiarities of karyotypes in species of the same genus enables in some cases the use of chromosomal apparatus as a most reliable criterion for a differentiation of close species.
描述了双口吸虫属的三种吸虫（剑状双口吸虫、模糊双口吸虫、麦氏双口吸虫）和一种泰勒吸虫（棒状泰勒吸虫）的染色体结构。有人认为核型研究可用于分类目的。有人认为这些吸虫核型中的染色体数目不具有分类学作用。染色体的大小和形态具有重要的分类学意义。通过这些特征揭示了不同属吸虫核型的差异。同一属物种成虫形态与核型特异性特征之间不存在紧密相关性，这使得在某些情况下可以将染色体结构作为区分近缘物种的最可靠标准。
