Platyhypnidium riparioides at Cullaloe LNR

New one for me I think, but not sure if it was picked up during the BBS meet. Growing on a rock in the burn in the middle of the reserve it is slightly flattened in appearance with the tips especially having a squashed bud-like appearance. This batch bore sporophytes which had already lost their caps. External peristome teeth seem to be 16 double" teeth, and black.