Looks more like L. dorsigera to me as well. L. thayeri has a backwards extension of the midlateral spot upwards to the dorsal fin at an angle that appears to be missing in the OP shots. Also, they don't have the dorsal edging that L. dorsigera do. It does look very much like a young L. dorsigera when you find them in stores before they settle down, which comparing it's colors at that time to the bright breeding colors of course wouldn't look right. Having kept both species, I'd lean L. dorsigera pending more settled in pics, but it's missing the main physical diagnostic of L. thayeri.
That's a good point about the lack of an extension to the midlateral spot. I thought that might have been a consequence of the faded colors, but perhaps not. The yellowish cast of the photo may also be a bit deceiving. I'd like to see better pics when the pattern is more pronounced. You may very well be correct. Is L. curviceps out of the picture for that matter? I assume the vertical bars on the rear flank disqualify that possibility?