OK, here are my notes:
Acupuri --- this is NOT anything I have a sample of. Putting into Inside Wood search engine those characteristics that I can readily identify, I get only 4 hits but I know nothing about any of these woods and have no idea whether or no any of the really fit the bill. Also, small variations in the characteristics entered can make a big difference in the reported results in Inside Wood and I am not expert in using their search engine. I tried looking at the end grain of each of these four on the NCSU LUNA site with the results shown.
Chrysophyllum pruniforme --- boa (ivory coast); NCSU pics show pore multiples that appear longer than what's in your wood but I can't be sure of that because I can't see you pores clearly enough.
Chrysophyllum africanum (syn. Gambeya africana) --- longhi (central africa, congo, liberia); NCSU pics show pore multiples that appear longer than what's in your wood but I can't be sure of that because I can't see you pores clearly enough.
Dialium guianense --- dozens of weird names (Mexico & Brazil); closest match I could find but again, extended pore multiples are a possible problem
Irvingia grandifolia --- lendo (west africa); more/closer-spaced rays
One of my problems is that as good as your end grain cleanup was, it was not good enough to show the individual pores clearly and I am having to interpolate from what I see to the belief (possible wrong) that there are very frequent pore multiples. Can you send me a sample of this to clean up? That actually may not do much good since I KNOW it isn't going to match any of my samples but it's possible that I'll be able to do a better job in finding something on Inside Wood