Originally, Edgar Riek described two giant spiny crayfish species, firstly in 1956 E. spinosus from the upper reaches of the Hastings River, New South Wales, then secondly in 1969 E. clydensis, from a side stream of the Clyde River near Brooman, and paratypes from near Conjola, New South Wales. Morgan (1997) revised the taxonomy of (more…)