Material collected between 1994 and 2020 in the Philippines, covering most main islands like Luzon, Mindoro, Palawan, Negros, Cebu, Leyte, and Mindanao and some smaller islands, substantially increased our knowledge of Labiobaetis Novikova & Kluge in this archipelago. Only three species were previously reported: L. molawinensis (Müller-Liebenau, 1982) and L. sumigarensis (Müller-Liebenau, 1982) from larvae and L. boettgeri (Ulmer, 1924) from adults. Eighteen new species have been identified using a combination of morphology and genetic distance (COI, Kimura 2-parameter). They are described and illustrated based on their larvae and a key to all species in the Philippines is provided. The total number of Labiobaetis in the Philippines has increased to 21 species. Additional diversity of Labiobaetis based on molecular evidence only is presented as Molecular Operational Taxonomic Units (MOTUs) without description. The interspecific K2P distances in the Philippines are between 15% and 27%, the intraspecific distances are usually between 0% and 3%. The total number of Labiobaetis species worldwide is augmented to 144.

中文翻译：

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菲律宾Labiobaetis Novikova＆Kluge的成功故事（Ba蝶，Baetidae），并描述了18个新物种

1994年至2020年之间在菲律宾收集的材料，涵盖了吕宋岛，明多洛岛，巴拉望岛，内格罗斯岛，宿雾，莱特岛和棉兰老岛等大多数主要岛屿以及一些较小的岛屿，极大地增加了我们对该群岛对Labiobaetis Novikova＆Kluge的了解。以前仅报道了三种：幼虫的莫拉林乳杆菌（Müller-Liebenau，1982）和苏门加尔乳杆菌（Müller-Liebenau，1982）和成年的乳杆菌L. boettgeri（Ulmer，1924）。结合形态和遗传距离（COI，木村2参数）已鉴定出18个新物种。根据它们的幼虫对它们进行描述和说明，并提供了菲律宾所有物种的关键。菲律宾的Labiobaetis总数已增加到21种。仅基于分子证据的Labiobaetis的其他多样性以分子操作分类单位（MOTU）的形式提供，没有描述。菲律宾的种间K2P距离介于15％和27％之间，种内距离通常介于0％和3％之间。全世界的Labiobaetis物种总数增加到144。