As deforestation and fire move forward over pristine vegetation in the Amazon, many species remain undiscovered and may be threatened with extinction before being described. Here, we describe two new species of Utricularia (Lentibulariaceae) collected during recent fieldwork in an area of white-sand vegetation in the eastern Amazon Basin named Campos do Ariramba. Further herbarium revision revealed that both species were first collected over 60 years ago in the same area, remaining unnamed until now. The new species, named U. arirambasp. nov. and U. jaramacarusp. nov., are placed in U. sect. Aranella and U. sect. Setiscapella, respectively. We provide full descriptions, illustrations, photographs, a distribution map, and taxonomic discussion for both species. Additionally, we provide a preliminary list of Lentibulariaceae from the Campos do Ariramba. Both new species are assessed as Vulnerable, however, yet known only from a few collections each, highlighting the urgency and importance of fieldwork and taxonomic revisions in the Amazon biogeographic region in order to provide essential data for the conservation of both known and still unknown biodiversity.

中文翻译：

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亚马孙白沙生态系统的隐藏生物多样性：巴西帕拉州的两个独特的Utricularia（Lentibulariaceae）新物种

随着森林砍伐和大火在亚马逊河原始植被上蔓延，许多物种仍未被发现，可能在灭绝前受到威胁。在这里，我们描述了在最近的田野调查期间在亚马逊东部盆地东部白沙植被地区收集的两个新的伞形科（Lentibulariaceae），名称为Campos do Ariramba。植物标本室的进一步修订表明，这两个物种都是60年前在同一地区首次采集的，直到现在仍未命名。新物种，命名为U. arirambasp。十一月 和U. jaramacarusp。十一月。，放置在美国教派中。阿拉内拉和美国教派。Setiscapella。我们提供了这两个物种的完整描述，插图，照片，分布图和分类学讨论。另外，我们提供了Campos do Ariramba中的虎杖科的初步清单。两种新物种均被评估为易危物种，但是，每个物种仅从少数几个物种中获知，这突出表明了亚马逊生物地理区域的实地考察和分类学修订的紧迫性和重要性，以便为保护已知和仍未知的生物多样性提供必要的数据。