And one without the typo...

Do we know the locality and horizon of the Helsinki specimen?

formally→formerly*
my bad English kill me

This is the official publication, and it is still in press(pre-proof). But I'm very honoured to be a part of this paper and contribute my modest efforts.
All these living things above are photographed by me.
www.sciencedirect.com/science/arti...

And there are a large number of animals from different ecological niche coexisted here in the Longdan locality during the Early Pleistocene. Eventually, the most of the fauna disappeared with violent climate change event.
Here's a chart of the Landscape reconstruction. 6/

Combining all known informations and previous work achievements, we can see the palaeoenvironmental at the northwestern corner of the Tibetan Plateau during the Early Pleistocene is more likely a moist, mosaic of environments (including massifs, grasslands, woodlands). 5/

Although there are still more evidence is needed for verification and support, we believed that Postschizotherium is a semi-aquatic (or hydrophilic, at least) clade of Hyracoidea. This is very different from their living relatives, which is better at climbing on land. 4/

which is the first nearly complete cranium of this genus. The cranium has cylindrical orbits, protruding strongly laterally, with an elevation that surpasses the frontal surfaces. Protrude eyes are very common in semi-aquatic animals, such as the Hippopotamus 3/

Recently, a newly discovered pliohyracid cranium (which been refered to Postschizotherium cf. intermedium) indicated something more about this enigmatic clade of Giant Hyrax. The Cranium was found from Longdan locality, Gansu, China. 2/