旧大陆的猪笼草
Thomas Gronemeyer, Volker Heinrich and Stewart McPherson carried out field studies on "N. hamiguitanensis" and the other species of Mount Hamiguitan between July 22–24, 2008. The taxon was subsequently identified as a natural hybrid between "N. micramphora" and "N. peltata" in McPherson's two-volume monograph, "Pitcher Plants of the Old World", published in May 2009.