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Diodorus, new silesaurid from Morocco


Kammerer, C.F., Nesbitt, S. J., Shubin, N.H. 201X. The first basal dinosauriform
(Silesauridae) from the Late Triassic of Morocco. Acta Palaeontologica Polonica 
(X): xxx-xxx. doi: 10.4202/app.2011.0015

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 sistertaxon
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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