A new species of Lepidodermella (Gastrotricha: Chaetonotida: Chaetonotidae) is described from two streams in northwestern Oregon, U.S.A. This is the fourth species of freshwater gastrotrich reported from the Pacific Northwest region of the United States. The dearth of reports appears to be due more to a lack of study rather than a lack of gastrotrichs. Lepidodermella squamata is one of the species already reported from the Pacific Northwest, and occurs sympatrically with the new species described here. No other members of the genus have been reported from the Pacific Northwest. Three species of Lepidodermella have been reported previously from North America. The genus includes one marine species and 14 freshwater species. Lepidodermella weissi, new species, brings the number of freshwater species to 15 and can be distinguished from other freshwater members of the genus by the following characters: absence of parafurcal spines, absence of transverse anterior ventral plates, head width of less than 40 μm, head with five lobes, pharynx length 44 μm or less, adhesive tube length of 5 μm or more, more than 35 scales per middorsal column, presence of seven or fewer posterior midventral columns of scales, presence of a pair of posterior ventral plates, and the presence of several columns of spined scales between the ventral ciliary bands and the smooth scales of dorsum and sides.

在美国俄勒冈州西北部的两条溪流中描述了一种新的鳞皮藻（Gastrotricha：Chaetonotida：Chaetonotidae）。这是美国太平洋西北地区报告的第四种淡水胃动物。报告的缺乏似乎更多是由于缺乏研究而不是缺乏胃菌素。Lepidodermella squamata是太平洋西北部已经报道的物种之一，与这里描述的新物种同域发生。太平洋西北部没有报告该属的其他成员。三个品种的Lepidodermella已经从北美先前报道。该属包括一种海洋物种和 14 种淡水物种。魏氏鳞皮菌, 新种, 使淡水种的数量达到 15 种，可以通过以下特征与该属的其他淡水成员区分开来：没有旁棘，没有横向前腹板，头部宽度小于 40 μm，头部有五个裂片，咽长 44 μm 或以下，粘管长度 5 μm 或以上，每个中背柱超过 35 个鳞片，存在 7 个或更少的后中腹鳞柱，存在一对后腹板，并且存在腹侧睫状带与背部和侧面的光滑鳞片之间的几列带刺鳞片。