It is either A. amphimuta or major.
I am inclined to think it is A. major for the following reasons, but could be wrong.
The postdiscal spot in space 1b is usually a V with both arms roughly of equal length in amphimuta.
In major it is a L or J with one arm shorter.
A. major appeared to be much the commoner of the 2 spp.
TL Seow