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Showing results for tags 'gilkmanius'.
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Help identifying a large fossil Ctenacanthiform Shark tooth from Late Pennsylvanian rocks in Illinois
Joseph Fossil posted a topic in Fossil ID
Sometimes it could be accurately said a fossil hunting trips most intriguing finds are discovered after bringing the fossils home. That's exactly what happened after my Sunday/August/19/2023 trip with @Tales From the Shale at some Late Pennsylvanian rock formations in Illinois. Lots of brachiopod, bryozoan, and pretty awesome Chondricthyan teeth were found on this trip. But it was at home that I accidentally uncovered a pretty remarkable find I would like help getting a Proper ID for. On Wednesday around 10:00PM EST, I decided to break open with a pretty large hammer so- 2 replies
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- pennsylvanian illinois
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Here are some more specimens which I quite frankly am scratching my head as to their identify! I'm also wondering if anyone can give a Proper ID for them? Unknown Specimen 1: Unknown Specimen 2: Unknown Specimen 3:
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On Sunday, I finally went again the Mazon Creek and later a Bond Formation rock formation of Pennsylvanian age, around 300 Million Years ago, in Braidwood, Illinois and Oglesby, Illinois with three friends after some scheduling adjustments. The trip was awesome and we collected a pretty impressive fossil haul. At Mazon Creek, We mainly hunted for fossils around the shores of local power plant cooling pond (which despite apparently having water temperatures that day of 100 degrees Celsius, still had a decent amount of birds resting on-top). We saw also a large rock pile
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- bond formation
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To really start the summer off well, I went recently to a Bond Formation rock formation of Pennsylvanian age, around 300 Million Years ago, in Oglesby Illinois with a few friends. The trip was overall good, though I almost fell off the rocks a couple times. It was a bit hot but overall I think I got a decent amount of fossils for the day. I found a decent amount of Crinoid stem fossils, of which here are a few of them: Found lots of what I think are Chondricthyian teeth (Chomatodus, Gilkmanius, etc.). But I would like help identifying them!!!
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- pennsylvanian
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The Chondricthyans (including the sharks and rays) have been around and keeping the ocean's ecosystems healthy for about 420 Million Years. Today, in celebration of this, I've decided to do a little fun post and list the eight times in Earth's history truly massive chondricthyans have emerged. Hope you all enjoy!!! The First is the Devonian, where there is at least one confirmed fossil (CMNH 5238) of a large currently unnamed Ctenacanthiform shark that reached lengths of 4.2-5 meters (13-16 feet) in length. https://www.mdpi.com/1424-2818/15/3/318 The
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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 -
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 -
Saivodus striatus and the Graham formation Gilkmanius: Which one was bigger?
Joseph Fossil posted a topic in Questions & Answers
The Ctenacanthiformes are an impressive group of prehistoric sharks, emerging in the Devonian period before surviving the two Devonian extinction events that gave rise to the Carboniferous. During the Carboniferous, the Ctenacanthiformes diversified rapidly, even becoming some of the Carboniferous Oceans Apex Predators. But of all the members of this impressive (yet almost unknown to the general public) group, two species stand out as especially impressive and awe inspiring - Saivodus striatus and the Graham formation Gilkmanius (this species currently doesn't have a name yet). Du- 3 replies
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