Jump to content
Sign in to follow this  
DD1991

New material of Acaenasuchus

Recommended Posts

DD1991

A new Triassic archosaur paper is available online:

 

Adam D. Marsh, Matthew E. Smith, William G. Parker, Randall B. Irmis & Ben T. Kligman (2020) Skeletal anatomy of Acaenasuchus geoffreyi Long and Murry, 1995 (Archosauria: Pseudosuchia) and its Implications for the Origin of the Aetosaurian Carapace. Journal of Vertebrate Paleontology DOI: 10.1080/02724634.2020.1794885

 

If anyone is new to Triassic paleontology or early archosaurs, Acaenasuchus was named by Long & Murry (1995) on the basis of material collected from the Blue Mesa Member of the Chinle Formation of the St. Johns locality in Arizona. However, Heckert and Lucas (1999, 2000, 2002) considered Acaenasuchus to be merely a juvenile of the aetosaur Desmatosuchus, but later authors (e.g. Irmis 2005, Parker 2005) rejected this argument because several morphological differences exist between the two genera regardless of the ontogenetic status of the material of Acaenasuchus. Parker (2016) had hinted at Acaenasuchus being non-aetosaurian, and the new paper by Marsh et al. recovering Acaenasuchus as sister to Euscolosuchus and Revueltosaurus in a clade with Erpetosuchidae and Aetosauria helps to shed light on what the earliest aetosaur relatives looked like, especially with respect to development of body armor.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×