Those Dilophosaurus crests…

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.

Figure 1. Dilophosaurus skull with alternates for the maxilla (green), nasal (pink), premaxilla (gold) and lacrimal (tan) colorized. I have not yet seen the paper, so I don't know where Welles identified sutures.

Figure 1. Dilophosaurus skull with alternates for the maxilla (green), nasal (pink), premaxilla (gold) and lacrimal (tan) colorized. I have not yet seen the paper, so I don’t know where
Welles identified sutures.

 

If anyone has more valid details on this problem
please send them here.

References
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.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s