Aug 2, 2020 · Bull shark (Carcharhinus leucas): Dusky shark (Carcharhinus obscurus): With respect to 3, the ranges of the two extant lemon shark species (see below from Ebert 2013) are very different. If the fossil species had the same range as the extant two species, where your teeth were found would be a good help in the teeth id.

Apr 20, 2024 · Hey all, Here are four teeth from the Gault Formation, Albian stage of Folkstone, Kent, UK. Am I correct that the left two teeth are Dwardius siversoni? The right two teeth have somewhat relatively bigger cusplets and they are more round. Could they be Dwardius or possible Cretoxyrhina sp.? I not...

Aug 30, 2016 · If you have the entire shark the distinction between the two is much easier to see. I have a number of Carcharhinus jaws that I'm not 100% sure on the id. If you buy a shark jaw on e-bay, there is a good chance that it is misidentified especially if the jaw comes from a seller in Vietnam. Marco Sr.

Oct 30, 2024 · My assumption was that lamniform sharks didn't really take off until the steady decline of the old Jurassic era regime like ichthyosaurs and plesiosaurs (pliosaurs) into the Cretaceous that were eventually devastated by the Cenomanian-Turonian (OAE 2) extinction.

Jun 17, 2015 · Ocean City Maryland is not near any outcrops of verte-fossiliferous sediment that I can think of. A large and deep excavation in downstate Delaware exposed a lot of Miocene vertebrate fossils but generally speaking the middle of the delmarva peninsula only has some very small low exposures on the eastern shore of the chesapeake along some rivers. the Choptank …

Nov 11, 2024 · 11-15 - Worn shark teeth, likely odontaspidid 16 - Likely geological, but could be a particularly worn crocodile tooth. 17 and 21 - Look fossiliferous. Heterodontus cf. lerichei? Worn batoid tooth plates? 18-20 - More worn shark teeth, again likely odontaspidid 22 - Definitely a tooth of some description. Trichiurus sp.?

Nov 10, 2024 · I found this along the Shark River in New Jersey - is it a very worn shark tooth (no enamel) or merely a suggestive rock? It even has what resembles a cusplet on one side. Also pictured are a couple other teeth fragments from the same area for comparison. Any help would be appreciated!

Aug 6, 2024 · From what I can see in your pictures, you might have found some Carcharhinus (requiem shark) teeth, but I'm not entirely sure. The larger, more curved ones might belong to the Hemipristis (snaggletooth shark), and the smaller, triangular ones could be from a Sand Tiger shark. The other pieces look like eagle ray teeth and maybe some other fish ...

Jul 6, 2011 · Yes, you can find Cretaceous-age teeth in quite a few parts of Montana. I have no exact locality data but consider the following:

Dec 12, 2024 · Na pierwszy, bardzo starty ząb wybrałbym Otodus obliquus. Drugi ząb, ten większy po lewej na trzecim zdjęciu, może należeć do Jaekelotodus robustus.