[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Theropod teeth from Lower Cretaceous of Sauerland, Germany



From: Ben Creisler
bcreisler@gmail.com


Note that one of the teeth was discovered back in 2011 and announced
in German news sources as "Dromaeosaurus":


http://dml.cmnh.org/2011Jul/msg00124.html

http://www.lwl.org/pressemitteilungen/mitteilung.php?urlID=24845#.UpFr_MQ_sbk


The same tooth is pictured and identified now as Coelurosauria indet.,


"The isolated tooth LWL Mn Ba 14 is a coeluosaurian premaxillary or
anterior dentary tooth. The DSDI of 1.1 is not typical for most
dromaeosaurids, but more similar to basal tyrannosauroids such as
Eotyrannus (Sweetman 2004). The lingual deflection of the mesial
denticle row is apparently rare, but represents no characteristic
feature in any phylogenetic analysis (e.g. Turner et al. 2012). A
theropod tooth with similar characters to those of LWL MN Ba 14 was
described by Zinke (1998) from the Upper Jurassic of Portugal as cf.
Dromeosaurus sp. Amiot et al. (2010) report a premaxillary or anterior
dentary tooth with a similar character from the Aptian-Albian of China
as Dromeosauridae indet. Similar features have been observed on teeth
of Dromeosaurus albertensis from the Upper Cretaceous of North America
(Currie et al., 1990) and on teeth of tyrannosauroid theropods from
the late Cretaceous of Asia (Brusatte et al. 2012)."

On Sat, Nov 23, 2013 at 6:47 PM, Ben Creisler <bcreisler@gmail.com> wrote:
> From: Ben Creisler
> bcreisler@gmail.com
>
> A new online paper:
>
> Klaus-Peter Lanser & Ulrich Heimhofer (2013)
> Evidence of theropod dinosaurs from a Lower Cretaceous karst filling
> in the northern Sauerland (Rhenish Massif, Germany).
> Paläontologische Zeitschrift (advance online publication)
> DOI: 10.1007/s12542-013-0215-z
> http://link.springer.com/article/10.1007/s12542-013-0215-z
>
>
> Theropod dinosaur teeth from a Lower Cretaceous karst filling in
> Devonian reef limestone (Massenkalk) located near the village of Balve
> on the northern margin of the Rhenish Massif, Germany, are described.
> Palynological evidence indicates that the karst filling took place
> during the Late Barremian to (Early) Aptian time interval.
> Palaeontological excavations carried out during several years at the
> Balve locality yielded remains of various animal groups, including
> sharks, amphibians, turtles, crocodiles, pterosaurs, herbivore
> dinosaurs, and, rarely, mammals. Of particular interest is an
> assemblage of different theropod dinosaur teeth, which has been
> characterized with the help of dental comparative morphometry. Based
> on these analyses, the teeth material from the Balve excavation can be
> assigned to five morphological groupings including dromaeosaurid and
> tyrannosauroid theropods. Morphological comparison of the theropod
> dinosaur teeth record with finds from other fossil localities in
> western and northwestern Europe of similar age shows clear
> similarities, but also some distinct differences.