Yes this is a species of the Pterostylis alliance or as I would, in this case prefer, a Bunochilus species but that option is not currently available to us. It would always from my preference be best to have a closeup photo of a single flower both front on and from the side. The labellum of this species is triggered and if bumped will snap closed. So it is best not to do that as we need to see the labellum to get an accurate identification.