A new calanoid copepod, Allodiaptomus nongensis n. sp., is herein described based on samples collected from the Xe Lanong River (a tributary of the Mekong River), and 13 other localities in Central Laos. This is the sixth species of the genus Allodiaptomus Kiefer, 1936. The other five members in the genus were recorded from India, South China, Cambodia, Thailand, and Vietnam. The features that stand out in the new species are in the male: the right caudal ramus has a large, biacuminate, conical process proximally, and the Exp-2 of the right P5 has a hook-shaped principal spine proximally. The new species is abundant in both temporary and permanent waters, but is restricted to Savannakhet Province. This Laotian endemic copepod is referred to by local people as “Pa Khayong”, which means tiny fish. Since high densities of this copepod can be found in the dry season (December until May), A cc ep te d A rti cl e

中文翻译：

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Allodiaptomus nongensis，来自湄公河支流的一种新的桡足类（桡足类：Calanoida），以及老挝中部当地人对它的消费记录

一种新的桡足类动物，Allodiaptomus nongensis n. sp.，是根据从 Xe Lanong 河（湄公河的一条支流）和老挝中部其他 13 个地方收集的样本进行描述的。这是 Allodiaptomus Kiefer 属的第六种，1936 年。该属的其他五个成员分别来自印度、华南、柬埔寨、泰国和越南。在新物种中突出的特征是雄性：右尾支在近端有一个大的、双尖的圆锥形突起，右 P5 的 Exp-2 在近端有一个钩状的主棘。新物种在临时和永久水域中都很丰富，但仅限于沙湾拿吉省。这种老挝特有的桡足类动物被当地人称为“Pa Khayong”，意思是小鱼。