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  1. Taxonomic debate over extinct lamniformes remains a big thing, but I've noticed that it seems like there hasn't been any studies that use modern phylogenetic techniques (i.e. maximum parsimony) to resolve issues with extinct taxa (i.e. Carcharodon, Isurus, Macrorhizodus, Otodus). Is there a reason for this absence, or perhaps I simply have not come across one that already exists? I suppose it's possible that dental characteristics alone as character codes for a phylogenetic matrix may not be viable...
  2. I've been going through my shark tooth collection recently trying to refine my ids. This one here has me somewhat stumped. I had identified it as Carcharhinus priscus, but I'm not at all sure any more and am now starting to wonder if it may be a chub or great white. The first photo, which I think is the labial view, seems to fit, but what I believe to be the lingual view (2nd photo) has me confused. The tooth is from the southern German Miocene Burdigalian. Slant length 15mm. Any advice here would be appreciated.
  3. Jello5700

    Shark tooth ID

    Is this a Great White Shark tooth? Found this in Myrtle Beach, South Carolina, USA about 15 years ago and just refound it while cleaning out a desk. It is about 1.25 inches (31.75mm) long and curves back from base to tip with serrations along the edge. Thanks!
  4. Free Access pdf link: https://www.tandfonline.com/doi/pdf/10.1080/08912963.2020.1861608?needAccess=true Shimada, K., Bonnan, M. F., Becker, M. A., Griffiths, M. L. (2021). Ontogenetic growth pattern of the extinct megatooth shark Otodus megalodon—implications for its reproductive biology, development, and life expectancy. Historical Biology. Abstract: The extinct megatooth shark, Otodus megalodon (Lamniformes: Otodontidae), is known primarily from its gigantic teeth in the late Neogene marine fossil record. It is known to reach at least 14.1‒15.3 m in length, but its r
  5. Sameih

    Fossil fossils

    Hi everybody. I found this Fossil fossils and I don't know anything about can you please let me know what this Fossil fossils . Thank you .
  6. I have seen several names for megalodon all with a different genus, which is correct? Edit: Another question, is cretalamna appendiculata the ancestor of otodus obliquis? Is there anything in between those if they are related? Do we know megalodon ancestry past C. appendiculata if it is directly related to O. Obliquis?
  7. Hey everyone, Thinking about purchasing this Megalodon tooth here, but want to make sure it's authentic first! Seller says it has no restoration and was found in Southeast US. It's 5.697" long. What do you think? Thanks in advance!
  8. Colvin, G., 2011, The Presence, Source and Use of Fossil Shark Teeth from Ohio Archaeological Sites. Ohio Archaeologist 61, no. 4, pp. 26-46. https://kb.osu.edu/handle/1811/56970 https://www.academia.edu/9539090/The_Presence_Source_and_Use_of_Fossil_Shark_Teeth_from_Ohio_Archaeological_Sites Colvin, G., 2014. Shark Teeth from Ohio Archaeological Sites: An Update Based on Newly Discovered Teeth. Ohio Archaeologist 64, no. 4, pp. 55-60. https://www.academia.edu/11497086/Shark_Teeth_from_Ohio_Archaeological_Sites_An_Update_Based_on_Newly_Discovere
  9. Found several of these while digging a hole for the swimming pool in our house. It was very surprising as I found hundred of them. Can anyone tell it is century old. I took a video of my discovery too.
  10. Ludwigia

    Carcharodon hastalis

    From the album: Pisces

    Whatever it's called, Carcharodon, Cosmopoltidus or Isurus, it has a slant length of 25mm. Burdigalian OMM Early Miocene From Billafingen, Germany
  11. Ludwigia

    Cosmopolitidus hastalis (Agassiz 1843)

    From the album: Pisces

    2cm. Or Carcharodon hastalis. Or Isurus hastalis. Whatever.... Burdigalian, Miocene. Found at Billafingen, Baden-Wuerttemberg, Germany. Genus to "Isurus" hastalis is still being debated. Some call it Carcharocles.
  12. True size of prehistoric mega-shark finally revealed University of Bristol, September 3, 2020 A new study has revealed the size of the legendary giant shark Megalodon, including fins that are as large as an adult human. The open access paper is: Jack A. Cooper, Catalina Pimiento, Humberto G. Ferrón, Michael J. Benton. Body dimensions of the extinct giant shark Otodus megalodon: a 2D reconstruction. Scientific Reports, 2020; 10 (1) DOI: 10.1038/s41598-020-71387-y Yours, Paul H.
  13. I’ve heard of them being found in shark river and even big brook but I’ve never seen any there. Supposedly cape May has smaller teeth but I haven’t hunted there so I’m not sure.
  14. Desert_survivor

    Lawrence Canyon Closed

    I headed up to Lawrence Canyon last week and this is what I found. Looks like the area is finally being developed. Say bye bye to another interesting and productive San Diego site. In honor of the site, here are a few of my favorite finds from Lawrence Canyon. I'd encourage everyone to post their favorites too.
  15. Tyrannosaurus-wreck

    Teeth/Bone ID

    Hello! Last time I was here I posted about 50 pieces of barnacle which I thought were teeth. Good news is, this time I actually have teeth! I sent these in to another fossil ID place, and they identified a few of my teeth as possible lemon shark, and the 8th from the left as a possible C. hastalis. If anyone can help identify more specifically what sharks the teeth came from I'd really appreciate it!! Also, the big brown fragment on the far right in these pictures they identified as some kind of bone fragment- maybe it's a long shot but do any of you know what it could have come fr
  16. Chase_E

    Carcharodon carcharias

    From the album: Misc. Cenozoic Specimens

    Carcharodon carcharias.
  17. Chase_E

    Carcharodon carcharias

    From the album: Misc. Cenozoic Specimens

    Carcharodon carcharias.
  18. Chase_E

    Carcharodon aff. hubbelli

    From the album: Misc. Cenozoic Specimens

    This is most likely a worn Carcharodon carcharias.
  19. Chase_E

    Carcharodon carcharias

    From the album: Misc. Cenozoic Specimens

    Carcharodon carcharias
  20. Gators40

    What did I find?

    Trying to figure out what I found, can anyone help?
  21. Nugget

    What teeth is this?

    I have not measured the exact size yet but from the overall size and looks, is it possible that this teeth is from megalodon? Or just a big great white teeth?
  22. LucG

    SHARK'S JAW

    Hello, I've had a shark's jaw for quite some time now and I'm curious to know what type of shark it belonged to. Can anyone please give me some clues based on the photos I've attached? I'm a newbie and fossil neophyte. Thank you very much in advance, Luc
  23. HunterMeg

    Shark Tooth Identification Help

    Hi, I recently bought this tooth from a friend, but I am uncertain which species it belongs to. The root is very thin with great white characteristics, but the lack of serrations on the blade is more like a mako. My best guess is that it is a Giant White Shark (Charcharodon Plicatitis). It measure 2.75 inches. The last 2 photos show the tooth in comparison to a Great White tooth on the right side and a Mako Shark tooth on the left side of the tooth in question. What do you believe it is? Thank you for helping me out.
  24. Hello I have just bought through an online auction my first fossil, supposedly a Carcarodontossaurus tooth but I'm in doubt if it is real. Can you guys help me analyzing it's authenticity? Description and pictures follows below: LOCATION: Taouz, Errachidia Province, South Morocco GEOLOGICAL FORMATION: Ifezouane Formation, Red Sandstone Beds, KemKem Basin Size and weight: 50.5 mm • 1.99 in, 13g DESCRIPTION Finest grade Carcharodontosaurus tooth. It is complete, from the base to the tip. Its lateral serrations are deeply developed. This tooth has been stabilized on its surface
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