In recent years the taxonomy of Haslea has been in flux. We describe several Haslea taxa from Guam, including four new species, in light of these recent findings. Four delicate, fusiform Haslea species are described from a variety of benthic habitats on coral reefs. These species, H. fusiformis comb. nov. and H. alexanderi, H. apoloniae and H. guahanensis spp. nov. are distinguished by stria density, foramen (‘areola’) shape, and cell size from each other and from similar taxa. A key to all these taxa is provided. In addition, an arcuate species is described as Haslea arculata sp. nov. The presence of a bilayered wall is shown for all these taxa. We compare the morphology of specimens reported as H. howeana from Guam with Navicula tsukamotoi, recently described from Okinawa, and with ‘Navicula cf. howeana’ from Puerto Rico. We provide the first account of the complex cingulum of N. tsukamotoi. We conclude that our specimens match N. tsukamotoi and that H. howeana should be returned to Navicula, but we leave open the question of conspecificity.

近年来，Haslea的分类法一直在变化。根据这些最新发现，我们描述了关岛的几种Haslea类群，包括四个新物种。在珊瑚礁的各种底栖生境中描述了四种纤细的梭状哈斯利物种。这些物种，H。fusiformis梳。十一月 和亚历山大·H，亚历山大·H·阿波罗尼亚和H·guahanensis spp。十一月 彼此之间的条纹密度，孔（“乳晕”）形状和细胞大小以及与相似的分类单元之间的区别。提供了所有这些分类单元的密钥。此外，弓形物种被称为Haslea arculatasp。十一月 对于所有这些分类单元，都显示了双层壁的存在。我们比较的报告为标本形态H. howeana从关岛舟形tsukamotoi，最近从冲绳描述，并与“舟形参 来自波多黎各的howeana '。我们提供了N. tsukamotoi的复杂扣带的第一个说明。我们得出的结论是，我们的标本与冢本猪笼草相吻合，应该将豪氏假单胞菌归还给Navicula，但是我们保留了特异性问题。