Summary A new root-knot nematode, parasitizing Robusta coffee in Dak Lak Province, Western Highlands of Vietnam, is described as Meloidogyne moensi n. sp. Morphological and molecular analyses demonstrated that this species differs clearly from other previously described root-knot nematodes. Morphologically, the new species is characterized by a swollen body of females with a small posterior protuberance that elongated from ovoid to saccate; perineal patterns with smooth striae, continuous and low dorsal arch; lateral lines marked as a faint space or linear depression at junction of the dorsal and ventral striate; distinct phasmids; perivulval region free of striae; visible and wide tail terminus surrounding by concentric circles of striae; medial lips of females in dumbbell-shaped and slightly raised above lateral lips; female stylet is normally straight with posteriorly sloping stylet knobs; lip region of second stage juvenile (J2) is not annulated; medial lips and labial disc of J2 formed dumbbell shape; lateral lips are large and triangular; tail of J2 is conoid with rounded unstriated tail tip; distinct phasmids and hyaline; dilated rectum. Meloidogyne moensi n. sp. is most similar to M. africana, M. ottersoni by prominent posterior protuberance. Results of molecular analysis of rDNA sequences including the D2–D3 expansion regions of 28S rDNA, COI, and partial COII/16S rRNA of mitochondrial DNA support for the new species status.

中文翻译：

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一种新的根结线虫，Meloidogyne moensi n。sp. （线虫：根结线虫科），寄生于越南西部高地的罗布斯塔咖啡

总结 一种寄生在越南西部高地达乐省罗布斯塔咖啡中的新根结线虫被描述为根结线虫。sp. 形态学和分子分析表明，该物种与其他先前描述的根结线虫明显不同。在形态学上，这个新物种的特征是雌性身体肿胀，后部有一个小的突起，从卵球形延伸到囊状；会阴纹具有光滑的条纹，连续和低背弓；侧线在背侧和腹侧条纹的交界处标记为微弱的空间或线性凹陷；不同的噬粒；无皮纹的外周区域；可见且宽的尾端被条纹同心圆环绕；女性的内侧唇呈哑铃状，略高于外侧唇；雌性管心针通常是直的，带有向后倾斜的管心针旋钮；第二阶段幼鱼（J2）的唇区没有环；J2的内侧唇和唇盘呈哑铃状；侧唇大且呈三角形；J2的尾巴是圆锥形的，尾尖圆润无条纹；明显的噬粒体和透明质；扩张的直肠。根结线虫 sp. 通过突出的后部突起与 M. Africana、M. ottersoni 最相似。rDNA 序列的分子分析结果，包括 28S rDNA、COI 和线粒体 DNA 的部分 COII/16S rRNA 的 D2-D3 扩展区，支持新物种状态。J2的尾巴是圆锥形的，尾尖呈圆形，无条纹；明显的噬粒体和透明质；扩张的直肠。根结线虫 sp. 通过突出的后部突起与 M. Africana、M. ottersoni 最相似。rDNA 序列的分子分析结果，包括 28S rDNA、COI 和线粒体 DNA 的部分 COII/16S rRNA 的 D2-D3 扩展区，支持新物种状态。J2的尾巴是圆锥形的，尾尖呈圆形，无条纹；明显的噬粒体和透明质；扩张的直肠。根结线虫 sp. 通过突出的后部突起与 M. Africana、M. ottersoni 最相似。rDNA 序列的分子分析结果，包括 28S rDNA、COI 和线粒体 DNA 的部分 COII/16S rRNA 的 D2-D3 扩展区，支持新物种状态。