ABSTRACT. Results are presented on species richness and distribution of the crustacean fauna obtained by iXingu Project expeditions along the middle and lower Xingu River during low and high water seasons primarily from 2013-2014, prior to the completion of the Belo Monte dam complex. The checklist includes the parasitic and decapod crustacean species surveyed in the Xingu River from the mouth of its tributary, the Iriri River, to its confluence with the Amazon River. With the addition of records from the scientific literature, a total of 32 species representing 18 genera in eight families are known to occur in the middle to lower Xingu basin: four species of fish lice, family Argulidae, four parasitic isopods, families Corallanidae (1 species) and Cymothoidae (3), 13 decapod crabs, families Pseudothelphusidae (5) and Trichodactylidae (8), and 11 decapod shrimps, families Sergestidae (1), Euryrhynchidae (3), and Palaemonidae (7). Seventeen species are recorded for the first time from the Xingu basin, highlighting the importance of focused sampling of decapods and other crustaceans in major sub-basins of the Amazon. The lower Xingu, below the Volta Grande rapids, held the most diversity with 19 species. The Volta Grande rapids (between Altamira and the lower Xingu) and the middle Xingu above Altamira exhibited 17 and 15 species, respectively. Based on comparisons to other Amazon and South American river basins, the middle and lower Xingu River supports a remarkably high diversity of decapods.

中文翻译：

---

来自巴西帕拉州贝洛蒙特大坝综合体上下新古（亚马逊盆地）中下游的寄生和十足目甲壳类动物的注释清单

摘要。在贝洛蒙特大坝综合体建成之前，主要是在 2013 年至 2014 年的低水季和高水季期间，iXingu 项目沿新古河中下游探险获得的甲壳类动物群的物种丰富度和分布结果。该清单包括在新古河从其支流伊里河河口到与亚马逊河汇合处调查的寄生和十足目甲壳类动物物种。加上科学文献的记载，在新谷盆地中下游共发现有8科18属32种：鱼虱4种、鱼虱科、寄生等足类4种、珊瑚科（1种) 和 Cymothoidae (3)，13 只十足目螃蟹，Pseudothelphusidae (5) 和 Trichodactylidae (8)，和 11 种十足目虾，Sergestidae (1)、Euryrhynchidae (3) 和 Palaemonidae (7)。新谷盆地首次记录了 17 种物种，突出了对亚马逊主要子盆地中十足目动物和其他甲壳类动物进行集中采样的重要性。位于 Volta Grande 急流下方的新谷下游拥有最多的多样性，有 19 个物种。Volta Grande 急流（在阿尔塔米拉和下新谷之间）和阿尔塔米拉上方的中新谷分别展示了 17 和 15 种。根据与其他亚马逊河流域和南美河流域的比较，新谷河中下游支持着非常丰富的十足类动物。强调对亚马逊主要亚流域中的十足目动物和其他甲壳类动物进行集中采样的重要性。位于 Volta Grande 急流下方的新谷下游拥有最多的多样性，有 19 个物种。Volta Grande 急流（在阿尔塔米拉和下新谷之间）和阿尔塔米拉上方的中新谷分别展示了 17 和 15 种。根据与其他亚马逊河流域和南美河流域的比较，新谷河中下游支持着非常丰富的十足类动物。强调对亚马逊主要亚流域中的十足目动物和其他甲壳类动物进行集中采样的重要性。位于 Volta Grande 急流下方的新谷下游拥有最多的多样性，有 19 个物种。Volta Grande 急流（在阿尔塔米拉和下新谷之间）和阿尔塔米拉上方的中新谷分别展示了 17 和 15 种。根据与其他亚马逊河流域和南美河流域的比较，新谷河中下游支持着非常丰富的十足类动物。