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Plesiosaurs from the Kem Kem Group


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Praefectus

https://www.sciencedirect.com/science/article/pii/S0195667122001744

 

Plesiosaurs from the fluvial Kem Kem Group (mid-Cretaceous) of eastern Morocco and a review of non-marine plesiosaurs

Georgina Bunker, David M. Martill, Roy Smith, Samir Zourhi, Nick Longrich

 

 

600763565_KemKemPlesiosaurs.JPG.7554b5ee861fc922963dfa27518ab3c0.JPG

Leptocleididae indet., shed teeth from the Kem Kem Group, Morocco.

 

859119789_KemKemPlesiosaurs2.JPG.d2e6fe8ccd8ea21c1cdc61ddf8dcc4f7.JPG

 

Unfortunately paywalled. Send me a message if you want the pre-proof PDF. 

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Troodon

Photo of the teeth 

Characteristics :

-Sigmoidal curvature

-Not very large if you look at the scale bar.

-Weakly recurved to hooked

-Homodont Dentition

-Thin enamel carinae

-Anterior carina cutting edge absent at base

-Sinuous enamel ridges on mesial, lingual and distal surfaces. 15-20 per tooth 

 

600763565_KemKemPlesiosaurs.7554b5ee861fc922963dfa27518ab3c0(1).JPG.2e1928e8e06b7e0d6ab9db6b8a4e4c5a.JPG

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IsaacTheFossilMan

Neat stuff. Have they described any new species from the area?

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Topics merged.

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Troodon
2 hours ago, IsaacTheFossilMan said:

Neat stuff. Have they described any new species from the area?

 

No just identified as the Kem Kem plesiosaur

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pachy-pleuro-whatnot-odon

It's interesting to see how all of the teeth illustrated here, as well as those in my collection (here and here), two additional teeth I've seen on Instagram, @Runner64's one and even @Jaimin013's near immaculate specimen all have damage to the tooth apex. Makes you wonder what they were eating, as certainly not all plesiosaur species have such consistent apical damage to their (mostly I'd even say they don't)...! :headscratch:

 

Also, I still need to read the article to check their sample size, but I do think there's a bit of positional variation in these teeth, as one of my specimens is decidedly broader and flatter...

 

Still, very cool to finally have a publication on this rather enigmatic plesiosaur species! :D

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Troodon
11 minutes ago, pachy-pleuro-whatnot-odon said:

Also, I still need to read the article to check their sample size

 

Screenshot_20220722-134643_Drive.jpg.d849da0d95a1c7b0add4db92f395cdad.jpg

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Troodon
34 minutes ago, pachy-pleuro-whatnot-odon said:

positional variation in these teeth, as one of my specimens is decidedly broader and flatter.

 

Until we see a dentition they described it as homodont so the teeth should have a similar morphology.   Need to keep an open mind to multiple species including one from a marine environment.

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pachy-pleuro-whatnot-odon
2 hours ago, Troodon said:

Until we see a dentition they described it as homodont so the teeth should have a similar morphology.   Need to keep an open mind to multiple species including one from a marine environment.

 

True. At the same time, however - considering the fragmentary record in the Kem Kem and the anisodont to heterodont dentition of most other plesiosaur (sensu lato) genera - it wouldn't be entirely unexpected if this new plesiosaur would also show some morphological variation in its dentition. But since this is only a seminal study, I guess only time will tell...

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