Abstract The Colombian species of the diving beetle genus Liodessus Guignot, 1939 are revised. Liodessus bogotensis Guignot, 1953 is re-described. Three higher altitude species are new to science: Liodessus azufralis sp. n., L. quillacinga sp. n. and L. quimbaya sp. n. We also introduce two new subspecies, L. quillacinga cochaensis ssp. n. and L. quillacinga cumbalis ssp. n. We delineate the species using morphological structures such as male genital structure and beetle size, shape and colour pattern. Mitochondrial cox1 sequence data provided an additional character source. All the new species occur on higher altitudes above 2700 m and were collected in shallow, exposed peatland pools and puddles, mostly in Páramo. Liodessus obscurellus (LeConte, 1852), not yet recorded from Colombia, is included into the key due to its presence in nearby Costa Rica and Ecuador. The known distribution and habitat preferences of each species are outlined briefly.

中文翻译：

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Liodessus Guignot 属的潜水甲虫，1953 年在哥伦比亚，描述了三个新物种（鞘翅目：Dytiscidae）

摘要 哥伦比亚种潜水甲虫 Liodessus Guignot 属，1939 年进行了修订。重新描述了 Liodessus bogotensis Guignot，1953 年。三种海拔较高的物种是科学界的新物种：Liodessus azufralis sp。n., L. quillacinga sp. n. 和 L. quimbaya sp. n. 我们还引入了两个新亚种 L. quillacinga cochaensis ssp。n. 和 L. quillacinga cumbalis ssp。n. 我们使用形态结构来描述物种，例如雄性生殖器结构和甲虫的大小、形状和颜色模式。线粒体 cox1 序列数据提供了额外的特征来源。所有新物种都出现在海拔 2700 m 以上的较高海拔地区，并收集在浅层、裸露的泥炭地池和水坑中，主要在帕拉莫。Liodessus blurllus (LeConte, 1852)，尚未在哥伦比亚记录，由于其存在于附近的哥斯达黎加和厄瓜多尔，因此被包含在密钥中。简要概述了每个物种的已知分布和栖息地偏好。