There has been alot of debate on that ,a while back when i posted them there was a big debate on this subject.
I have owned sp. catemaco and pink fenestratus.I have pink fenestratus now.
I have seen both fish side by side and this is the difference that i see(of course i am no scientist ,just my personal side by side comparison)
1.fenestratus seem to grow larger,by alot(my sp.catemaco male maxed out at 8",my fenestratus males seem to grow way larger 10"+)
2.fenestratus fry has more horizontal barring than sp. catemaco(more vertical barring)
3.sp. catemaco males seem to develop a larger hump on their head than fenestratus(none of my pink fenestratus seem to develop humps at all)
4.fenestratus seem to vary more in color than sp. catemaco
In my opinion i think sp. catemaco is a smaller less colorful race of fenestratus.
Now info from things that i have read and things that was brought up in the other thread.
1.lake catemaco has volcanic divides that may isolate fish from each othe at certain times of year(i guess water levels cut of certain parts of the lake)
2.all fenestratus come from the same lake(not sure why fish from the same lake can be so different)
3.There are a few referrences to a different race of fenestratus that can be found with a little research
4.I have copies of older paper work that refer to a different race(but they are older not sure if they were proven or disproven)
5.there are folks on this site that dispute any fish you get from don conkel(so be prepared tohave folks dis your fish you post from don,been going through that with folks on this site for a few years now)
6.the same fish is also referenced as a conkeli in several books(not officially named after don conkel,but apparently he is credited for the fish)seperate from fenestratus.
All i can say is do your own research and see what you come up with,I personally see them as a different race others may not,i base my opinion from side by side comparisions(but as i said i am no scientist and i have to trust the word of the people i buy fish from and so far don conkel has never given me any reasn to doubt what he says,all fish i have from him are top notch specimens,and i have never been dissapointed)