I think that this may be an area that is just at the present time unresolved. There is at least one guy who is doing research on Monstera. there nay also be others, to try and revise the genera. I don;t think there has been a revision of the genus since when? The 1970's? I think Dr. Thomas Croat was/is working on a revision and has enlisted these younger scientists to help with the field work so perhaps in the future there will be more data available. I myself tend to stay away from stuff like this, people who do not know exactly what they have are selling what they think is one thing and it may not really be that, and the amount of $$ that is being asked is just too much to not be certain. I am sure this happens in Australia as well....people are selling hybrid plants as species and people who do not know the difference buy them and then it turns out they don;t have what they thought they were buying. I think this is happening with all the genera
