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LÃvia Roese Miron, Ane Elise Branco Pavanatto, FlÃvio Augusto Pretto, Rodrigo Temp MÃller, SÃrgio Dias-da-Silva & Leonardo Kerber (2019)
Siriusgnathus niemeyerorum (Eucynodontia: Gomphodontia): The youngest South American traversodontid?
Journal of South American Earth Sciences 97: 102394
doi: https://doi.org/10.1016/j.jsames.2019.102394
https://www.sciencedirect.com/science/article/pii/S0895981119304985
Siriusgnathus niemeyerorum (Eucynodontia: Gomphodontia): The youngest South American traversodontid?
Journal of South American Earth Sciences 97: 102394
doi: https://doi.org/10.1016/j.jsames.2019.102394
https://www.sciencedirect.com/science/article/pii/S0895981119304985
On Mon, Oct 21, 2019 at 8:46 AM Ben Creisler <bcreisler@gmail.com> wrote:
Ben CreislerA new paper:ÂLÃvia Roese Miron, Ane Elise Branco Pavanatto, FlÃvio Augusto Pretto, Rodrigo Temp MÃller, SÃrgio Dias-da-Silva & Leonardo Kerber (2019)
Siriusgnathus niemeyerorum (Eucynodontia: Gomphodontia): The youngest South American traversodontid?
Journal of South American Earth Sciences (advance online publication)
doi: https://doi.org/10.1016/j.jsames.2019.102394
https://www.sciencedirect.com/science/article/pii/S0895981119304985
Highlights
New specimens of the traversodontid Siriusgnathus niemeyerorum are described.
They represent the first records of S. niemeyerorum outside its type-locality.
The studied sites are assigned to the Riograndia Assemblage Zone, Norian.
S. niemeyerorum may be the youngest known South American traversodontid so far.
Abstract
Traversodontidae is a less inclusive clade of cynognathian cynodonts that lived during the Triassic. Recently, a traversodontid from the southern Brazilian Triassic beds was described -- Siriusgnathus niemeyerorum -- based upon specimens found exclusively in its type-locality. No absolute age or index fossils have been reported for this locality, which prevents an accurate biostratigraphic correlation. In the present contribution, we describe the first specimens of S. niemeyerorum found outside its type-locality, comprising skull portions excavated from outcrops in southern Brazil assigned to the Caturrita Formation (upper portion of the CandelÃria Sequence), Upper Triassic (Norian), Riograndia Assemblage Zone. As a result, we provide an updated biostratigraphic framework and suggest a Norian age for the type-locality of S. niemeyerorum, which, accordingly, possibly comprises the youngest South American traversodontid, pending additional geochronological studies in order to properly evaluate this hypothesis.