Questions about any large and currently unnamed Ctenacanthiformes sharks known

[Joseph Fossil]

As I have been researching large ctenacanthiform sharks from North America, I've been wondering if there are any known globally that are currently unnamed. I definitely know of the large Ctenacanthiformes Saivodus stratus (found in both what is now North America and Great Britain), the large Ctenacanthiform from the Permian Kaibab formation in Arizona, and the 'Texas supershark' (a likely large species of Gilkmanius) from the Pennsylvanian Texas Graham formation (all three as larger or larger than an adult Great White Shark (Carcharodon carcharias)). 

 

But are there any large ctenacanthiformes (at least in size comparable to a modern day adult Great white shark (Carcharodon carcharias)) currently unnamed that are also known?

 

Ctenacanthiformes are known from North America, Greenland, Europe, Asia, and South America.

 

https://www.mindat.org/taxon-P34476.html

 

Even though study of Ctenacanthiformes as a whole is just starting to become more through within the past few decades, I'm wondering if anyone on the forum is aware of any currently unnamed Ctenacanthiform fossils from areas outside of North America of Great White Shark (Carcharodon carcharias)) size?

 

[DPS Ammonite]

What Kaibab Formation large unnamed Ctenacanthiform are you referring to?

 

There is a good paper on Kaibab sharks:

1. John-Paul M. Hodnett, David K. Elliott, Tom J. Olson & James H. Wittke (2012)Ctenacanthiform sharks from the Permian Kaibab Formation, northern Arizona, Historical Biology, 24:4, 381-395, DOI: 10.1080/08912963.2012.68319
    
   https://www.researchgate.net/publication/254237970_Ctenacanthiform_sharks_from_the_Permian_Kaibab_Formation_northern_Arizona

Edited January 22, 2023 by DPS Ammonite

[Joseph Fossil]

22 hours ago, DPS Ammonite said:

What Kaibab Formation large unnamed Ctenacanthiform are you referring to?

 

There is a good paper on Kaibab sharks:

1. John-Paul M. Hodnett, David K. Elliott, Tom J. Olson & James H. Wittke (2012)Ctenacanthiform sharks from the Permian Kaibab Formation, northern Arizona, Historical Biology, 24:4, 381-395, DOI: 10.1080/08912963.2012.68319
    
   https://www.researchgate.net/publication/254237970_Ctenacanthiform_sharks_from_the_Permian_Kaibab_Formation_northern_Arizona

 

@DPS Ammonite Kaibabvenator. My bad, briefly forgot the name as I haven't looked at the paper in a while.

[Joseph Fossil]

There are also a few other large Ctenacanthiforms currently unnamed I've just stumbled across.

 

There is one surprisingly from the Devonian (represented by partial Meckel's cartilage Specimen CMNH 5238) that grew up to 5 meters (16.4 feet) in length.

 

Ginter, M. Teeth of late Famennian ctenacanth sharks from the Cleveland Shale. In Morphology, Phylogeny and Paleobiogeography of Fossil Fishes; Elliott, D.K., Maisey, J.G., Yu, X., Miao, D., Eds.; Verlag Dr. Friedrich Pfeil: München, Germany, 2010; pp. 145–158.

https://www.researchgate.net/publication/350889762_CTENACANTHIFORM_SHARKS_FROM_THE_LATE_PENNSYLVANIAN_MISSOURIAN_TINAJAS_MEMBER_OF_THE_ATRASADO_FORMATION_CENTRAL_NEW_MEXICO

https://www.mdpi.com/1424-2818/15/3/318

 

 

Another is Cladodus cf C.marginatus, from the Surprise Canyon formation of the Late Mississippian stage of the Carboniferous era. It's currently represented by Tooth Specimen USNM PAL 412169, of which the tooth is around 160 mm (16 cm) wide. Could possible be the size of a medium size modern day Great White Shark when alive based on tooth size.

http://npshistory.com/publications/grca/jp-92-77-2018.pdf

 

 

I've also heard that Cladodus vanhornei and Cladodus mirabilis could reach possible medium size great white size shark size (around 10-16 feet), but I'll have to double check the sizes.