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The oldest record of drepanosaurids (Reptilia, Diapsida) from the Late Triassic (Adamanian Placerias Quarry, Arizona, USA) and the stratigraphic range of the Drepanosauridae

Silvio C. Renesto, Justin A. Spielmann, Spencer G. Lucas
2009 Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen  

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The oldest record of drepanosaurids (Reptilia, Diapsida) from the Late Triassic (Adamanian Placerias Quarry, Arizona, USA) and the stratigraphic range of the Drepanosauridae. -N. Jb. Geol. Paläont. Abh., 252: 315-325; Stuttgart. Abstract: Previous detailed descriptions of relatively complete drepanosaurid material make it possible to recognize isolated drepanosaurid elements from other localities. The identification of isolated elements from the USA and Great Britain extended the geographical
more » ... stribution of the group and encouraged a review of Triassic collections for characteristic elements of this family. In this paper, isolated vertebrae previously described as problematic reptiles from the famous Placerias Quarry, near St. Johns, Arizona, USA are re-identified as drepanosaurids. These specimens represent the oldest occurrence of this family, which is earliest Adamanian.
doi:10.1127/0077-7749/2009/0252-0315 fatcat:cm6u7mj4knaxxj4kgx3kcszdf4
Citation

Silvio C. Renesto, Justin A. Spielmann, Spencer G. Lucas. "The oldest record of drepanosaurids (Reptilia, Diapsida) from the Late Triassic (Adamanian Placerias Quarry, Arizona, USA) and the stratigraphic range of the Drepanosauridae." Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen 252.3 (2009) 315-325