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South American occurrences of the Adamanian (Late Triassic: Latest Carnian) index taxon Stagonolepis (archosauria: aetosauria) and their biochronological significance
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ABSTRACT-Aetosaur fossils from the Upper Triassic Ischigualasto Formation of Argentina formerly assigned to Aetosauroides scagliai Casamiquela and Argentinosuchus bonapartei Casamiquela are reassigned to Stagonolepis robertsoni Agassiz (small specimens) and S. wellesi (Long and Ballew) (larger specimens). Numerous features of the skull, vertebral column, appendicular skeleton, and particularly the armor, of these Argentinian aetosaurs are identical to those of Stagonolepis and differ from oth...
Related newspaper, magazine, and journal articles from HighBeam Research
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Early dinosaurs found in Argentina.
Science News
; Early dinosaurs found in Argentina Just what makes a dinosaur a dinosaur? Fifteen years ago, paleontologists thought they had a clear answer, but fossil finds since then have muddied the issue. One of the problems, says researcher Paul C. Sereno from the University of Chicago, is that scientists
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DINOSAURS Finds reshape the family tree
The Boston Globe
; work in Nova Scotia and other cutting-edge research around the world are featured in a four-part PBS television series, "The Dinosaurs!" It starts Nov. 22, at 8 p.m. (Ch. 2) and continues for three nights. At the foot of the Andes in western Argentina there is a huge parched canyon whose steep
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