Feb 7, 2025 · When the shark was alive it had probably 2 rows of teeth at the top and bottom visible. The rest was covered with a gingival tissue that protected its young teeth in formation. The more you look inside the jaw (towards the throat) the less teeth are formed. The first thing that forms on a shark tooth is enamel, so the outside.

Feb 11, 2025 · Hi everyone, I had these teeth laying around for a while now and this is my first attempt at even trying to identify shark teeth. All come from Antwerp (Miocene) or North Sea, Belgium. * Group1: Hexanchus griseus? * Group 2: Isurus spp? …

Jul 20, 2014 · Shark vertebrae tend to be preserved as just the centrum (the hockey puck-like disk) with two openings on top and two on the bottom where the hemal and neural arches were attached. The arches were cartilaginous in life and disintegrate quickly after death.

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.

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.

Aug 18, 2018 · Fossil shark teeth have been dredged up on the Gold Coast and can be found at another secret site (I don't know where it is so don't ask me haha) somewhere in SE QLD. Apart from those you can find Permian sharks like Xenocanthus in the Sydney Basin although not exactly on beaches, but they're probably as close as you'll get however.

Nov 2, 2024 · From the book on Gainesville sharks teeth (Boyd, 2016), I would call it Notorynchus primigenius and according to the book, complete ones like this are pretty rare, so well done.

Jan 10, 2016 · Shark vertebrae of different genera/species can look very similar. It is almost impossible to id a vertebra by pictures. There are a good number of physical measurements which must be taken and at least 14 vertebra features looked at.

Nov 28, 2024 · What other shark teeth do you find at this site? EDIT: is this from Ocala limestone? That is late Eocene which rules out O. obliquus, so T. twiggsensis is my guess then. Edited November 29, 2024 by Anomotodon

Jul 7, 2022 · So, in speaking to @digit, I was convinced to make a wooden sifter to replace my current PVC pipe one, and in doing so, make a guide on how! So first things first - I followed Ken’a tips and his post here from years ago: So the materials: - 4 pieces of 1”x3”x20” lumber. I …