1993年,J·H·亞當、C·C·威爾科克和M·D·斯溫(M. D. Swaine)描述了一個新物種,其命名為沙勞越豬籠草。[5]學者基於籠蔓尾分叉和籠蓋上表面外圍的絲狀附屬物將其與姆魯山豬籠草區分開來。他們還比較了姆魯山豬籠草與其自然雜交種葉片中酚類化合物的分布。但他們並未具體說明研究植株數量和重複次數的多少。[4]因此也有學者質疑這個自然雜交種的存在。[24]查爾斯·克拉克寫道學者在描述沙勞越豬籠草時認為「這樣的研究不容易進行重複實驗」。[4]儘管這個自然雜交種很可能存在,但沙勞越豬籠草的描述也很可能是基於姆魯山豬籠草的下位籠標本得出的。[4]
Smythies, B.E. 1965. The distribution and ecology of pitcher-plants (Nepenthes) in Sarawak. UNESCO Humid Tropics Symposium, June–July 1963, Kuching, Sarawak.
Bauer, U., C.J. Clemente, T. Renner & W. Federle 2012. Form follows function: morphological diversification and alternative trapping strategies in carnivorous Nepenthes pitcher plants. Journal of Evolutionary Biology25(1): 90–102. doi:10.1111/j.1420-9101.2011.02406.x
Collins, N.M. 1980. The distribution of soil macrofauna on the west ridge of Gunung (Mount) Mulu, Sarawak. Oecologia44(2): 263–275. doi:10.1007/BF00572689
Hanbury-Tenison, A.R. & A.C. Jermy 1979. The Rgs Expedition to Gunong Mulu, Sarawak 1977-78. The Geographical Journal145(2): 175–191. doi:10.2307/634385
Nerz, J., A. Wistuba, C.C. Lee, G. Bourke, U. Zimmermann & S. McPherson 2011. Nepenthes nigra, a new pitcher plant from Central Sulawesi. In: McPherson, S.R. New Nepenthes: Volume One. Redfern Natural History Productions, Poole. pp. 468–491.
Meimberg, H. & G. Heubl 2006. Introduction of a nuclear marker for phylogenetic analysis of Nepenthaceae. Plant Biology8(6): 831–840. doi:10.1055/s-2006-924676
Jay, M. & P. Lebreton 1972. Chemotaxonomic research on vascular plants. The flavonoids of Sarraceniaceae, Nepenthaceae, Droseraceae and Cephlotaceae, a critical study of the order Sarraceniales. Naturaliste Canadien99: 607–613.
Som, R.M. 1988. Systematic studies on Nepenthes species and hybrids in the Malay Peninsula. Ph.D. thesis, Fakulti Sains Hayat, Universiti Kebangsaan Malaysia, UKM Bangi, Selangor Darul Ehsan.
Clarke, C.M., U. Bauer, C.C. Lee, A.A. Tuen, K. Rembold & J.A. Moran 2009. Supplementary methods. Biology Letters, published online on June 10, 2009.
Hazebroek, H.P. & A.K. bin Abang Morshidi 2002. A Guide to Gunung Mulu National Park: A World Heritage Site in Sarawak, Malaysian Borneo. Natural History Publications (Borneo), Kota Kinabalu.
Meimberg, H., A. Wistuba, P. Dittrich & G. Heubl 2001. Molecular phylogeny of Nepenthaceae based on cladistic analysis of plastid trnK intron sequence data. Plant Biology3(2): 164–175. doi:10.1055/s-2001-12897
Meimberg, H., S. Thalhammer, A. Brachmann & G. Heubl 2006. Comparative analysis of a translocated copy of the trnK intron in carnivorous family Nepenthaceae. Molecular Phylogenetics and Evolution39(2): 478–490. doi:10.1016/j.ympev.2005.11.023