James,
I doubt that it was osculans. This species is now in the genus Austrosquilla and is reported from Victoria and Bass Strait, South Australia and Western Australia. It is not known, to my knowledge, from the York Peninsula. In fact, this entire genus seems to like cool water. A. tsangi occurs from Southern Queensland south, but that is about it. The most common Nannosquillidae that I have collected from North Queesland are Pullosquilla litoralis and P. thomassini. Both are small and rarely get more than 18 mm. Alachosquilla vicina gets up to 35 mm and is very common in this area.
Roy