sentences: acuminata" has been found associated with "Nanahughmilleria lanceolata", "Hardieopterus lanarkensis", "Eusarcana obesus", "Parastylonurus sigmoidalis", "Carcinosoma scorpionis" and "Erettopterus bilobus" and "S. stylops" have been found associated with "Nanahughmilleria pygmaea", "Eusarcana salteri", "Hardieopterus megalops", "Erettopterus brodiei", "Erettopterus gigas", "Hughmilleria banksi", "Eurypterus cephalaspis" and "Pterygotus ludensis".