近年来,天津口岸检疫人员在进境荷兰百合种球中多次截获穿刺短体线虫,同时发现穿刺短体线虫种群中存在尾型变异的个体与穿刺短体线虫的典型尾型截然不同。为弄清这些尾型变异个体的分类地位,本研究在形态观察的基础上,经18S rDNA基因序列比对及其系统发育分析,发现来自荷兰的HL种群中的7种变异尾型个体在分子上与穿刺短体线虫具有极高的相似性,说明这些具变异尾型的短体线虫归属于穿刺短体线虫(P.penetrans)。 In recent years, Tianjin port quarantine officers intercepted Piercea nematodes several times in the Netherlands lily bulbs. At the same time, it was found that the individuals with the trailing variation in the population of the parasite nematodes were quite different from the typical tail-type nematodes. In order to find out the taxonomic status of these tail variant individuals, based on the morphological observation, through the sequence alignment of 18S rDNA genes and phylogenetic analysis, it was found that seven mutant tail individuals from the HL population in the Netherlands The results showed that these short mutant nematodes belong to P. penetrans.