Bennetittales were first identified by Engler in 1892 as separate from Cycadales .
Bennetittales were first then further were differentiated into the two groups Cycadeoidaceae and Williamsoniaceae by Caruthers .
Bennetittales were first identified by Engler in 1892 as separate from Cycadales , and then further were differentiated into the two groups Cycadeoidaceae and Williamsoniaceae by Caruthers .