A new species, Noguchiphaea laotica, is described based on specimens from Lon San, Saysomboun Province, Laos. The holotype male and a paratype female are deposited in the National Museum of Nature and Science, Tokyo. This new species is allied to N. yoshikoae from northern Thailand, but differs from it in the morphology of the male cercus which is depressed centrally apically in dorsal view, and with a more robust dorsal spine at about one-third from its base. In addition, DNA analyses confirm that there are genetic differences between N. laotica and N. yoshikoae. Some observations on the ecology and behavior of N. laotica are briefly reported. http://www.zoobank.org/urn:lsid:zoobank.org:pub:44D39DC5-40A5-4F33-B951-D3AD0B5247B7

中文翻译：

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发现 Noguchiphaea Asahina 属的第三种物种，1976 – Noguchiphaea laotica sp。n. 来自老挝（Odonata：Calopterygidae）

根据来自老挝赛松本省 Lon San 的标本描述了一个新物种 Noguchiphaea laotica。正模雄性和副模雌性存放于东京国立自然科学博物馆。这个新物种与泰国北部的 N. yoshikoae 结盟，但与它的不同之处在于雄性尾蚴的形态学在背侧视图中中央凹陷，并且在距其基部约三分之一处具有更坚固的背刺。此外，DNA 分析证实 N. laotica 和 N. yoshikoae 之间存在遗传差异。简要报告了对 N. laotica 生态和行为的一些观察。http://www.zoobank.org/urn:lsid:zoobank.org:pub:44D39DC5-40A5-4F33-B951-D3AD0B5247B7