Revised February 15, 2016 with the deletion of the putative sister taxa, Megapnosaurus, which did not nest with Dilophosaurus when finally put to the test in the large reptile tree today.
Sometimes it is easy to see the sutures on a skull.
Sometimes, not so easy. That’s the case with Dilophosaurus (Welles 19454) an early theropod dinosaur with a partial skull that is cracked in so many places, the skull sutures that create the crest are camouflaged. So some alternates are proposed here (Fig. 1) without seeing the original paper, unfortunately.
If anyone has more valid details on this problem
please send them here.
Welles SP 1954. New Jurassic dinosaur from the Kayenta formation of Arizona”. Bulletin of the Geological Society of America 65 (6): 591–598. doi:10.1130/0016-7606(1954)65[591:NJDFTK]2.0.CO;2.