revision preference src: A similar trapping method is employed by the Sumatran endemic N. lingulata, which has a single filiform appendage positioned over the pitcher mouth. In that species the appendage is a appendage of the lid and not the peristome. <SEP> tgt: A similar trapping method is employed by the Sumatran endemic N. lingulata, which has a single filiform appendage positioned over the pitcher mouth. However, in that species the appendage is a structure of the lid and not the peristome.