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Showing results for tags 'ctenacanthiformes'.
Found 6 results
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Any more information on the apparent Ctenacanthiform genus Pyknotylacanthus from the Early Triassic
Joseph Fossil posted a topic in General Fossil Discussion
I've recently heard about a Ctenacanthiform genus named Pyknotylacanthus from the Triassic of what is now Nevada and Idaho. The Ctenacanthiform genus consists of two species (P. spathianus and P. humboldtensis). What makes this genus so interesting is that while I've mostly heard that there is a gap in the fossil record between Permian and the Cretaceous where Ctenacanthiform fossils are recorded, this genus bridges that gap (if only by a little bit). G. Guinot, et al. (2013). Cretaceous stem chondrichthyans survived the end-Permian mass extinction. Nature -
Questions about any large and currently unnamed Ctenacanthiformes sharks known
Joseph Fossil posted a topic in Questions & Answers
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 ctenac -
I am really excited about a project we have been working on. We decided to switch our shark displays from the ones based on Geological era to a taxonomic display style. We had been considering this since we made a similar switch with our dinosaurs. It has made those programs flow more easily and i think allowed the kids to get a better understanding of the animals. We originally set our displays up as they were because we simply did not have enough material to do taxonomic displays. There were a few orders of sharks for which we had only one or two fossils and one extinct order for which we ha
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Is Cladodus part of Cladoselachiformes or Ctenacanthiformes
Joseph Fossil posted a topic in Questions & Answers
As I was recently doing some research on the prehistoric shark genus Cladodus, I came across some info that classifies the genus as a member of the family Cladoselachidae, Order Cladoselachiformes. https://en.wikipedia.org/wiki/Cladoselachidae This is somewhat confusing to me as mindat and the Paleontological Database aka fossilworks list Cladodus as a member of the family Ctenacanthidae, Order Ctenacanthiformes. https://www.mindat.org/taxon-8657177.html http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=104838 -
The impact of the Serpukhovian extinction on Ctenacanthiform diversity
Joseph Fossil posted a topic in Questions & Answers
During the early part of the Serpukhovian stage of the Mississippian period, Carboniferous era around 330 Million years, a mass extinction occurred that wiped out between 13-39% of marine genera. Stanley, S. M. (2016, October 3). Estimates of the magnitudes of major marine mass extinctions in earth history. pnas.org. Retrieved December 30, 2022, from https://www.pnas.org/doi/10.1073/pnas.1613094113 McGhee, G. R., Sheehan, P. M., Bottjer, D. J., & Droser, M. L. (2012, February 1). Ecological ranking of Phanerozoic biodiversity crises: The Serpukhovian (early Carbonif -
Largest Cladodonts found in the Bond Formation, Oglesby, Illinois
Joseph Fossil posted a topic in Questions & Answers
I've visited the Pennsylvanian Bond formation in Oglesby Illinois a few times but have only found a few cladodont teeth so far! I find a decent bit of teeth from crusher plate chondrichyans like Deltodus, but I've also heard there have been some large cladodont teeth found in the area. I'm just curious what is the largest cladodont teeth found in Oglesby Illinois?
