Macintosh HD not visible / deleted in Disk Utility, cannot re-install Lion

Hi
Any help for the following? Excuse the unclear terminology
MBA 2011, trying to do a clean install of either Lion or Yosemite.  I erased the 'Macintosh HD' in disk utility in preparation for this, but something went awry during the process and it seems to have actually deleted the 'parent' drive (i.e. the SSD which sometimes has the manufacturers name).  So if I go into disk utility via ctrl+r the hard drive does not appear at all - totally gone.  I try to do an internet reinstall of Lion, there is nowhere to install it; and if I try to reinstall Yosemite from a bootable USB I have the same problem.  I checked the condition of the hard drive prior to this, it was fine, and I have checked the hardware using the ctrl+d on boot and this also indicates that there are no problems with the drive - so I reasonably sure the hard drive isn't actually fried.
So...where has it gone? And how to I get it back so that disk utility can see it and I can actually reformat it etc etc??

Boot the MBA OPTION + COMMAND + R.  The resulting display should be a revolving globe.
By following the directions, you will be connected to the Apple servers and should be able to install the original OSX that the MBA came with (Lion).
A solid Internet connection will be required.
Ciao.

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