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#1
10-18-2010, 07:45 PM
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Ok, this is a toughy. If there are definite polyps growing at the top of each of the bumps on the top surface and definite polyps growing at the tips of each of the bumps on the growth edge then I'd lean more towards a. efflo (acropora tend to grow from their polyps where as monti's tend to extend their edges or tips without growing from a definte corallite). Here's an acro with a similar growth for but you can see the corallites which the "bumps" grow from (link). There are a few acros that can start growing like what you have, A. solitaryensis is one of them.
If the growth edge is relatively polyp free and the top surface has polyps growing between the bumps (verruculli I think they're called?) then it's definitely a montipora of some sort, though god knows what kind. Could be m. undata, but I don't think it is. Could be a Ly Seng? I think you might just have to narrow it to which family it's from first. Do you have an info like where it's from, how long you've had it (how old is it), etc that could help us narrow it down? 
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#3
10-18-2010, 09:31 PM
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I don't think it's an undata..I had one and this one doesn't look like it at all. But having said that...I have no clue what it could be...just know it's not m. undata.
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75 gallon with 20 gallon sump in the works. R. Bacchiega. Tattooer I didn't smack you, I simply High Fived your face. I've got so much glue on my pants it looks like a Friday night gone horribly wrong.
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#5
10-18-2010, 10:01 PM
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I had a tyree true Undata...I'll try and find a picture of it...but the polyp structure/layout doesn't look the same...
poor photo: 
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75 gallon with 20 gallon sump in the works. R. Bacchiega. Tattooer I didn't smack you, I simply High Fived your face. I've got so much glue on my pants it looks like a Friday night gone horribly wrong. Last edited by Rbacchiega; 10-18-2010 at 10:03 PM. Reason: edit to add photo
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#7
10-18-2010, 10:23 PM
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Well, from what you have said I am positive it's a montipora, however, I'm pretty convinced that's not a m. undata. The two things that give that away are:
- the growth edge: m. undata has a smoother growth edge. Granted this can change depending on flow conditions but it general yours is too "gnarly" to be undata. -The verrucae are too shallow and the corralites are too even and regular and are not fused into ridges, which is one of the identifying features of undata (and m. danae for that matter, which is commonly confused for undata) Most of the time when you find picture of m. undata on the net, it's not actually undata... just kinda looks like it or they're really just making their best guess. Montipora are probably the hardest to ID as there is so much variation not just within the species but with external stresses as well. And, without a geographical location it's almost impossible. You might have to wait for it to grow up a bit and see what it does or just settle with the fact that it's a sexy mystery monti. Or you can send me a frag and I can "take a closer look"  .
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