Helicotylenchus vulgaris is a plant-parasitic nematode reported from several countries in various biogeographical regions. During the survey on Helicotylenchus in Iran and the South African Plant-Parasitic Nematode Survey in South Africa, H. vulgaris was found in samples from northern and southern Iran and from two provinces in South Africa. Helicotylenchus vulgaris was identified based on morphological and molecular characteristics. The result based on the hierarchical clustering of the principal component analysis placed the South African and Iranian populations into different groups, while the British populations were put together with the Iranian populations. Besides, the phylogenetic analysis of four Iranian H. vulgaris based on 28S rDNA indicated that they group into two different clades. Median-joining network analysis using 28S rDNA grouped H. vulgaris into two different groups, with the South African (acc. nrs: HM014239 and HM014238) sequences having 65 and 67 step differences, whereas a population from Iran (MF996711) was placed in a different group. In conclusion, the results showed that variations exist among the diverse populations of H. vulgaris, as shown by both morphological and molecular characters. A detailed revision of the species is, however, should be studied using different genes.

寻常型螺旋线虫是一种植物寄生的线虫，已在多个国家的不同生物地理区域报道。在对调查螺旋线虫在伊朗和南非植物寄生线虫调查在南非，H.寻常，从北部和南部的伊朗样品和来自南非的两个省被发现。ħ Ë licotylenchus寻常基于形态学和分子特征鉴定。基于主成分分析的层次聚类的结果将南非和伊朗人口分为不同的群体，而英国人口与伊朗人口放在一起。此外，对四个伊朗人进行了系统发育分析基于28S rDNA的寻常型嗜血​​杆菌表明它们分为两个不同的进化枝。使用28S rDNA进行中位连接网络分析将寻常型嗜血杆菌分为两个不同的组，其中南非序列（序列号：HM014239和HM014238）的阶跃差异为65和67，而伊朗种群（MF996711）被置于不同的组。总之，结果表明，在形态学和分子学特征上都表明变异存在于不同的寻常型嗜血​​杆菌中。但是，应该使用不同的基因研究该物种的详细修订。