Board Thread:Theories and Speculation/@comment-9338136-20180716151639/@comment-32685487-20180717214425

EMS is what is referred to as the straight tomoe, there is literally no other way to put this as Madara's MS is not straight, only Izuna's MS and Sasuke's MS can be considered Straight so it comes back to the EMS and if you noticed Madara himself never called the new MS, Eternal Mangekyo Sharingan so I am thinking Madara just named the EMS, Choku Tomoe Mangekyo Sharingan and Itachi just called it the Eternal Mangekyo Sharingan.