Diagnoza

Closely related S. robertsoni has nine to ten dentary teeth, compared to seven to nine in S. olenkae.

Porównanie

In S. robertsoni the ventral margin of the antorbital fenestra and the ventral edge of the maxilla are almost parallel, whereas in S. olenkae they are at an oblique angle to one another (9° in smaller individuals of S. olenkae and 25° in larger individuals). In S. olenkae the squamosal is relatively deeper and the postorbital is relatively more massive than in S. robertsoni. It is likely that all of these differences may be connected to allometry. In S. robertsoni there is a horizontal ridge on the medial side of the dorsal process of the maxilla that does not occur in S. olenkae. The morphology of the tibia differentiates S. wellesi from both European stagonolepids. Stagonolepis olenkae bears a flat area on the dorsal surface of the narrow anterior process of the nasal.

Autekologia

Omnivorous

Występowanie geograficzne

Poland

Zasięg czasowy

Late Carnian

Materiały muzealne

Hundreds of isolated bones and fragments of skeletons in articulation (e.g. manus and tail)

Literatura

Desojo, J. B., Heckert, A. B., Martz, J. W., Parker, W. G., Schoch, R. R., Small, B. J., Sulej, T. 2013. Aetosauria: a clade of armoured pseudosuchians from the Late Triassic continental beds. In S. J. Nesbitt, J. B. Desojo and R. B. Irmis (eds.) Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and their Kin. Geological Society, London, Special Publications, 379.

Dzik, J. & Sulej, T. 2004. Pierwszy polski dinozaur. 80 pp, Śląskie Wydawnictwo ADAN, Opole.

Dzik, J. & Sulej, T. 2007. A review of the early Late Triassic Krasiejów biota from Silesia, Poland. Palaeontologia Polonica 64, 1-27.

Scheyer, T.M., Desojo, J.B., Cerda, I.A. 2014 Bone histology of phytosaur, aetosaur, and other archosauriform osteoderms (Eureptilia, Archosauromorpha). The Anatomical Record. 297,  240–260

Sulej, T. 2010. The skull of an early Late Triassic aetosaur and the evolution of the stagonolepidid archosaurian reptiles. Zoological Journal of the Linnean Society 158, 860–881.