I received this in a swap.
The trader said it is Lepismium houlletianum: http://davesgarden.com/guides/pf/go/97922/
I disagree and think it may be epiphyllum anguligar: http://davesgarden.com/guides/pf/go/113650/
But the lobes are not as deep as anguligar.
Help with ID
I do believe you are correct. As far as the deep angularity of the leaves, young leaves do not seem to be as deep as older ones in my opinion.
I agree I have one plant that has 3/4 different shapes of angles
I think it is a Ric-Rac cactus as well. Check in Plant Files.....
It is in the Orchid cactus family.
These have the alternating "bumps" on the stalks....There is another kind where the ric-racs are opposite each other....
VERY easy to root from stem cuttings......OR--a whole section of the plant, should one break off....
The blooms are beautiful!