Pedram Majid, Pourjam Ebrahim, Atighi Mohammad Reza, Panahandeh Yousef
Department of Plant Pathology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.
J Nematol. 2015 Jun;47(2):148-52.
Heterodorus youbertghostai n. sp. is described and illustrated based on morphological, morphometric, and molecular data. The new species was found in two geographically distant points in northwestern Iran and is characterized by having angular lip region, separated from the rest body by a constriction, body length of 1,432.5 to 1,751.3 µm, odontostyle length of 24 to 28 µm, rod-like odontophore, 37.0 to 42.5 µm long, lacking flanges at base, double guiding ring at 14 to 16 µm distance from anterior end, pharyngeal bulb comprising 40% to 48% of pharynx, intestine usually containing green material, female reproductive system amphidelphic with less divided short uterus, specific structure of pars distalis vaginae, bluntly conical tail, dorsally convex and ventrally flat, with rounded tip and saccate bodies in ventral side. The new species comes more close to H. conicaudatus and H. irregularis by its morphology and morphometric characters. Compared to former, it has remarkable difference in vulva position and tail characters, and compared to the latter, it could be separated by shorter body, posteriorly located vulva, wider lip region, and longer tail. In phylogenetic analyses using partial sequences of 28S rDNA D2-D3, the new species formed a fully supported clade with several isolates of H. brevidentatus, prevalent in Iran. The other nordiid taxon, Enchodorus dolichurus, already reported from Iran, was also sequenced for the same genomic region and included in phylogenetic analyses.
基于形态学、形态测量学和分子数据，对尤伯特异矛线虫新种进行了描述和图示。该新种在伊朗西北部两个地理上相距遥远的地点被发现，其特征为唇区呈角状，与身体其他部分由缢缩隔开，体长1432.5至1751.3微米，口针长24至28微米，口针杆状，长37.0至42.5微米，基部无凸缘，双导环距前端14至16微米，咽球占咽的40%至48%，肠内通常含有绿色物质，雌性生殖系统为双子宫型，子宫短且分支少，阴道远端部分结构特殊，尾部钝圆锥形，背面凸起、腹面扁平，顶端圆形，腹侧有囊状体。从形态学和形态测量学特征来看，该新种与圆锥异矛线虫和不规则异矛线虫更为接近。与前者相比，其阴门位置和尾部特征有显著差异；与后者相比，可通过较短的身体、位于后部的阴门、较宽的唇区和较长的尾部进行区分。在使用28S rDNA D2 - D3部分序列进行的系统发育分析中，该新种与伊朗常见的几种短齿异矛线虫分离株形成了一个得到充分支持的分支。另一种已在伊朗报道过的北欧线虫类群——长异矛线虫，也对同一基因组区域进行了测序并纳入系统发育分析。
