旧大陆的猪笼草
The type population of "N. surigaoensis" was rediscovered in 2007 by Thomas Gronemeyer and Volker Heinrich. Subsequent research by these authors led to a proposal in a 2008 issue of the German-language journal "Das Taublatt" to elevate the taxon to species level once more. This was supported by Stewart McPherson in his 2009 monograph, "Pitcher Plants of the Old World", which included an extensive morphological description of the species.