nope, the noxter are an invention for the Fleet Operations universe

also they have added some creatures to their swarm which are know from star trek episodes (for example the macro virus from voyager)
The breeder (the basic unit, some kind of starbase if you want so) produces larvas, which can evolve to most units and 'stations'. some units or Ästations' can evolve to other organisms, too, but the larva is the basic of all

yep, similar to the zerg from Starcraft
They harvest dilithium and tritanium like most other races