The past 2-3 years have seen a surge in discoveries of new Nepenthes species in this region, particularly in the highlands of Phillippines, which is turning out to be a bubbling hot spot. Examples include
N. gantungensis, N. hamiguitanensis,
N. leonardoi and N. palawanensis and
N. attenboroughii previously mentioned here.
The newest addition to the list is
Nepenthes robcantleyi , which incidentally was known in the trade for some time and in fact was already rather famous prior to its formal describtion, being featured in horticulture shows like that in Chelsea and Singapore - albeit as "
Black truncata".
2 forms were on display during the recent show here, a red form ....


...... and a darker form, which was how the name "
Black truncata" came about.
It was previously believed to be a highland form of the
N. truncata (shown below), differing in the wider peristome (the wings at the rim of the pitchers). However, the paper also stated several differences .... if you are keen take a look at
François 's interesting entry.
This new species was confined to a mountain in Mindanao, and is feared extinct in the wild as its habitat had been destroyed - such a scenario is so prevalent its a cliche to mention it nowadays.
Its closest relative is
Nepenthes veitchii shown below, a more wide-ranging species from Borneo, although the pitchers are much smaller. Too close if you ask me.

Ref: Nepenthes robcantleyi sp. nov. (Nepenthaceae) from Mindanao, Philippines, Nordic J. Bot. 29: 2 (1-5; fig.). 2011