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Book Chapter

Doswelliidae: A Clade of Unusual Armoured Archosauriforms from the Middle and Late Triassic

By
Hans-Dieter Sues
Hans-Dieter Sues
Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, MRC 121, PO Box 37012, Washington, DC 20013-7012, USA
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Julia B. Desojo
Julia B. Desojo
Sección Paleontología de Vertebrados, Museo Argentino de Ciencias Naturales “Bernadino Rivadavia”, Av. Ángel Gallardo 470, C1405DJR, Buenos Aires, Argentina
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Martín D. Ezcurra
Martín D. Ezcurra
GeoBio-Center, Ludwig Maximilian-Universität, Richard-Wagner-Strasse 10, D-80333 Munich, Germany
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Published:
January 01, 2013

Abstract

Doswelliidae is a clade of armoured non-archosaurian archosauriform reptiles more closely related to Archosauria than are Proterosuchidae, Erythrosuchidae and possibly Euparkeria capensis. It is currently known from the late Middle Triassic (Ladinian) of Germany, the late Middle to early Late Triassic (Ladinian–Carnian) of Argentina and Brazil, and the Late Triassic (Carnian–Norian) of the USA. To date, two unambiguous synapomorphies diagnose Doswelliidae: (i) osteoderm ornamentation coarse, incised, and composed of central regular pits of subequal size and shape, and (ii) osteoderms with anterior articular lamina. Five taxa are currently recognized: Archeopelta arborensis, Doswellia kaltenbachi, Doswellia sixmilensis, Tarjadia ruthae and a new taxon from Germany. Based on skeletal features and occurrence, doswelliid archosauriforms may have had a semi-aquatic mode of life.

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Contents

Geological Society, London, Special Publications

Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and their Kin

S. J. Nesbitt
S. J. Nesbitt
University of Washington, USA
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J. B. Desojo
J. B. Desojo
Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’, Argentina
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R. B. Irmis
R. B. Irmis
Natural History Museum of Utah, USA
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Geological Society of London
Volume
379
ISBN electronic:
9781862396395
Publication date:
January 01, 2013

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