The animal weighs  and reaches up to  long excluding the long antennae, and is similar to P. delagoae, found off South Africa, from which it may be differentiated by a number of characters including the larger number of spines.
The animal's mass and total length, excluding the long antennae, is similar to P. delagoae, discovered off South Africa, which may be distinguished by additional characteristics including a higher number of spines.