I don't see it on the list of creatures that cannot be impregnated by the bug, its size and drag weight of 600 would suggest it can be, but after a couple of pheromones attempting we decided to use our last one on a diplo instead which after some issues we finally managed to get it to impregnate just before the timer ran out but it was lower level and has a lower Drag weight of 575.
I'd still like to use our Paracer for the next tame, but only if it can be confirmed that it can work on them obviously.