Species 125

The Borg queen was a member of Species 125.

Note: This is NOT a PC and NPC rated species.

Species 125 is the Borg designation for a species as yet unknown to the Federation outside of the Collective. However, it is likely that this species has been completely assimilated.

The Borg Queen, as of 2375, was a member of Species 125 before being assimilated, and thereby had the body of a female of this species prior to having a cybernetic body constructed for her.

There are faint horizontal lines on the Borg Queen's neck. This may either be a species characteristic or a Borg neck implant.

This information taken from http://www.memory-alpha.org/