A new species, Campyloneurum atrosquamatum, is described from the western Amazonian region of Ecuador to Bolivia, and from French Guiana and northeastern Brazilian Amazon. The new species belongs to the Repens Clade of Campyloneurum. Previously, it had been identified as C. coarctatum because of its similar lamina size and shape. An earlier phylogenetic study, however, resolved it as sister to C. fuscosquamatum, a species with nearly identical rhizome scales and a similar geographic distribution. We describe the new species, compare it to related species, and provide illustrations, distribution maps, and a key to similar species. A lectotype is chosen for C. coarctatum.

中文翻译：

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Campyloneurum atrosquamatum (Polypodiaceae)，亚马逊河新种

从厄瓜多尔西部亚马逊地区到玻利维亚，以及法属圭亚那和巴西亚马逊东北部描述了一个新物种，Campyoneurum atrosquamatum。新物种属于 Campyloneurum 的 Repens Clade。以前，它被确定为 C. coarctatum，因为它的叶片大小和形状相似。然而，较早的系统发育研究将其解析为 C. fuscosquamatum 的姐妹，后者是一种具有几乎相同的根茎尺度和相似地理分布的物种。我们描述新物种，将其与相关物种进行比较，并提供插图、分布图和相似物种的关键。为 C. coarctatum 选择选型。