Field of Science

Diodorus scytobrachion, A New Silesaurid from the Late Triassic of Morocco


I've had this paper in the queue for a bit as I still don't like the idea of online publishing of new taxon names at the "accepted manuscript" stage, but the knowledge of this proposed new taxon is increasingly widespead so I'll post the abstract and link here now. Silesaurids are amazingly cosmopolitan in their distribution and must have been significant members of various Triassic ecosystems, most likely filling the role later occupied by ornithischians.


I'm a big fan of the creative taxonomic name as well.


Kammerer, C. F., Nesbitt, S. J., and N. H. Shubin. In press. The first basal dinosauriform (Silesauridae) from the Late Triassic of Morocco. Acta Palaeontologica Polonica. doi: 10.4202/app.2011.0015


Abstract - Disarticulated material from the Late Triassic Timezgadiouine Formation in the Argana Basin of Morocco represents a new taxon of silesaurid dinosauromorph,
Diodorus scytobrachion gen. et sp. nov. D. scytobrachion can be distinguished from other silesaurids by the presence of anteriorly-canted teeth that decrease in size towards the anterior end of the dentary and a distinct lateral ridge running parallel to the dentary alveolar margin. In a phylogenetic analysis, D. scytobrachion is recovered as the sister taxon to the Brazilian Sacisaurus agudoensis, nested deep within Silesauridae. This new taxon provides further evidence of a near-cosmopolitan range for basal dinosauriforms in the Late Triassic and further demonstrates the disparity of dental morphologies within Silesauridae.

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