02057 - Premium Quality Large 1.11 Inch Cretaceous Pterosaur Tooth
02057 - Premium Quality Large 1.11 Inch Cretaceous Pterosaur Tooth 02057 - Premium Quality Large 1.11 Inch Cretaceous Pterosaur Tooth

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02057 - Premium Quality Large 1.11 Inch Cretaceous Pterosaur Tooth

$63.50

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Species
Coloborhynchus moroccensis, Mader and Kellner 1999
Age
Upper Cretaceous, Cenomanian stage, (~96 Million Years)
Location
Taouz, Kem Kem Basin, South Morocco
Formation
Aoufous Formation, Kem Kem Basin, Red Sandstone Beds
Size
28.2 mm   •    in
Weight
1 g   •    oz
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Description

The tooth is preserved in all its original length. It does not have any restoration or reparation. Without doubt, finding teeth of this species with intact tip and enamel is a very complex task nowadays.

The teeth with strong and vivid fossilization colors such as red, orange and black come from small paleochannels composed by thin layers, in the intermediate and upper stratigraphic levels (Red Sandstone Beds), from the Aoufous Formation (Kem Kem Basin, South of Morocco). The lithology of this body of sediment is characterized by the dominance of sandstones (also known as arenites) and fluvial gravel, of siliceous nature. Sometimes large concentrations of iron oxide are present, and then a small sample of that is usually present at the base of the tooth. These mineralizations are responsible for the wide range of beautiful reddish color tones, slowly drawn during millions of years via fossil-diagenetic processes. The complicated sedimentarian architecture of the layers where most large vertebrates are found makes the excavation methodology a real challenge. Sometimes the local miners have to excavate long tunnels that follow the distribution of the fossiliferous layer.

The pterosaurs dentition rests in the Upper Cretaceous in North Africa are relatively common among the fauna which got preserved from those ecosystems around 100 million years ago. However, only two different pterosaur taxons have been described. Mader & Kellner (1999) (Full reference: B. J. Mader and A. W. A. Kellner. 1999. A new anhanguerid pterosaur from the Cretaceous of Morocco. Boletim do Museu Nacional - Geologia 45:1-11) described the Coloborhynchus moroccensis species, belonging to the Anhangueridae family, which lived at the middle of the Cretaceous (between the Albian and Cenomanian stages, about 105 million years ago). Remains have been discovered in Morocco. Another alternative combination in the nomenclature of this taxon is Siroccopteryx moroccensis.

Phylogeny: The descriptors of Siroccopteryx placed this genus in the family Anhangueridae, sensu Kellner. David Unwin, however, indicated in 2001 that it was a species of Coloborhynchus, then he called it as C. moroccensis and being a member of the Ornithocheiridae. This has been controversial. In the same year, Michael Festnacht suggested it was more similar to Anhanguera due to the wide end of the snout. In 2009, Kellner considered that Siroccopteryx, Coloborhynchus clavirostris and Uktenadactylus probably formed together a clade within Anhangueridae. [This last paragraph is from Wikipedia - License: Attribution-ShareAlike 3.0 Unported]

The type specimen is: LINHM 016, a partial skull (Anterior part of upper jaw with teeth). Its type locality is Beg'aa, west of Hamada du Guir, which is in a Cenomanian fluvial sandstone in the Kem Kem Formation of Morocco.

For more rigorous scientific information, see also Martill and Unwin 2011, Rodrigues and Kellner 2008, Unwin 2001 and Unwin 2003.
Despite the amount of teeth of this genus than have been discovered, there is still a lot to be discovered about the paleoecology of this flying piscivorous.

On the other hand, recently Ibreahim et al., 2010, described a new genus and species of pterosaur, belonging to the Azhdarchidae family, and found in the same fossiliferous locations of the Moroccan Cretaceous. This new species was named Alanqa saharahica. (Full reference: N. Ibrahim, D. M. Unwin, D. M. Martill, L. Baidder, and S. Zouhri. 2010. A new pterosaur (Pterodactyloidea: Azharchidae) from the Upper Cretaceous of Morocco. PLoS One 5(5):e10875)

The different Geological Formations that make up the orography of the Cretaceous in the South East of Morocco have been mostly treated in an undifferentiated and not too accurate way by collectors, by Paleontology aficionados and by fossil dealers.

Historically, fossils dealers from all around the world have identified the dinosaur pieces from this sector as belonging to the Tegana Formation. However, in a formal way, most of the last published studies refer to other nomenclature in the description of the units and formations of the Lower and Upper Cretaceous.

That's why next we include an interesting link where the Aoufous Formation and the Ifezouane Formation are described, making reference to their age, geological history, sedimentology, stratigraphy and vertebrate assemblage. It includes a brief explanation of the stratigraphic concepts that have been established formally until today in the studies of this sector of Morocco.

This way, the precise stratigraphic understanding of the origin of the rests, as well as the sedimentological analysis, enables a better paleoecologic characterization of the environments where this amazing dinosaur assemblage lived. 

Link: Aoufous Formation

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