Known only from the Goulburn River system in central Victoria, on the Murray-Darling Basin side of the Great Dividing Range. Found only in a small upland area extending along the south-eastern portion from the Delatite River system in the north-east, southward to the upper reaches of the Goulburn River near Woods Point, and then westward to a hybrid population in the Sunday Creek system near Mount Disappointment, just north of Melbourne, at an elevation between 400-1600 m asl. Now extirpated in the lower Rubicon River (Rubicon), Gaffneys Creek (A1 Mine Settlement), Whitehouse Creek (NE Marysville), and Mountain Creek (Kinglake) (Ref. 98815).