Board Thread:Naruto Discussions/@comment-3568954-20140530034624/@comment-833649-20140530051138

If you read Chapter 678, Sasuke said that another Rinnegan could cancel a previous Rinnegan jutsu, therefore Infinite Tsukiyomi is stated to be a Rinnegan jutsu. Kaguya was stated to have used Infinite Tsukiyomi and what causes the jutsu to be cast is from the third eye, which she has. The Sharingan is mentioned for the quote you put to start this topic.