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I've found this abstract of a forthcoming article on J. Dzik's homepage.
It seems that, as compared with earlier informal reports, which described
_Silesaurus_ as a basal ornithopod, the author has now decided to move it back
towards the root of the Dinosauria.
Journal of Vertebrate Paleontology (in press).
A beaked herbivorous archosaur with dinosaur affinities from the early Late
Triassic of Poland
Instytut Paleobiologii PAN, Twarda 51/55, 00-818 Warszawa, Poland. e-mail:
Abstract. An accumulation of skeletons of the pre-dinosaur _Silesaurus
opolensis_ gen. et sp. n. is described from the Keuper (Late Triassic)
claystone of KrasiejÃw in southern Poland. The strata are correlated with the
late Carnian Lehrberg Beds and contain a diverse assemblage of tetrapods,
including the phytosaur Paleorhinus, which in other regions of the world
co-occurs with the oldest dinosaurs. A narrow pelvis with long pubes and the
extensive development of laminae in the cervical vertebrae place _S. opolensis_
close to the origin of the clade Dinosauria above _Pseudolagosuchus_, which
agrees with its geological age. Among the advanced characters is the beak on
the dentaries, and the relatively low tooth count. The teeth have low crowns
and wear facets, which are suggestive of herbivory. The elongate, but weak,
front limbs are probably a derived feature.