• Victor Perez posted a new activity comment 3 weeks ago

    3 weeks ago
    3 weeks ago

    Shark tooth on the left is a sand tiger (genus Carcharias). On the right is a Turritella gastropod (snail).

    • Might be Carcharias or Odontaspis reticulata but would need to see the other side of the tooth to make sure.

  • Victor Perez posted a new activity comment 3 weeks, 3 days ago

    3 weeks, 3 days ago
    3 weeks, 3 days ago

    C. cuspidatus is the appropriate name. There’s something in the rules of taxonomic nomenclature about masculine vs feminine suffixes. I had a conversation with Bretton Kent about this somewhat recently.

  • Victor Perez posted a new activity comment 3 weeks, 3 days ago

    3 weeks, 3 days ago
    3 weeks, 3 days ago

    Your previous comment now makes sense. I’m going through these in reverse chronological order. In the recent review of the sharks of Calvert Cliffs, Bretton Kent (@bkent) refers to Carcharias reticulatus. Is that equivalent to Odontaspis reticulata?

  • Victor Perez posted a new activity comment 3 weeks, 3 days ago

    3 weeks, 3 days ago
    3 weeks, 3 days ago

    There was a post-doc on the project that wrote a paper changing the genus to Physodon, but it was never really accepted by the scientific community.

    • Unfortunately there are researchers who try to change genera or species simply for little or no valid reason other than to get published.

      • In Microsoft picture manager which came with Office 2010, you can easily adjust pictures, change brightness and contrast and rotate or flip them. Other image editors can do the same but are usually more complicated to use.

  • Victor Perez posted a new activity comment 3 weeks, 3 days ago

    3 weeks, 3 days ago
    3 weeks, 3 days ago

    Hey @bill-heim I’m confused what you want me to observe or change here? I have it identified at Carcharias (could add that it’s Carcharias cuspidatus)

  • Victor Perez posted a new activity comment 4 weeks, 1 day ago

    4 weeks, 1 day ago
    4 weeks, 1 day ago

    Your tooth is from a requiem shark, genus Carcharhinus.

  • Victor Perez posted a new activity comment 1 month ago

    1 month ago
    1 month ago

    It’s not a tortoise spur. It may be a process off of a vertebra but I can’t really say much with certainty on this one.

  • Victor Perez posted an image in the group Group logo of BookwormsBookworms from the myFOSSIL app 1 month ago

    1 month ago
    1 month ago

    Did you know Steve Irwin’s son, Robert Irwin, is a fossil enthusiast? He has a book series called Robert Irwin Dinosaur Hunter!

  • Victor Perez posted an image in the group Group logo of Paleo PicsPaleo Pics from the myFOSSIL app 1 month ago

    1 month ago
    1 month ago

    A small fern (Dicroidium) from a Triassic site in Australia. Unfortunately, the carbon compression was partially separated from the rock so it did not remain intact after the photo. #fossil

  • Victor Perez posted a new activity comment 1 month ago

    1 month ago
    1 month ago

    Scratch that, there’s a paper that reassigned them to either Nododendron or Townroviamites

  • Victor Perez posted a new activity comment 1 month ago

    1 month ago
    1 month ago

    I don’t think it’s Cordaites. The site is Triassic. I think the horsetails are more likely Phyllotheca australis

  • Victor Perez posted a new activity comment 1 month, 2 weeks ago

    1 month, 2 weeks ago
    1 month, 2 weeks ago

    Yes, they all appear to be sand tigers.

  • Victor Perez posted a new activity comment 1 month, 3 weeks ago

    1 month, 3 weeks ago
    1 month, 3 weeks ago

    Looks like there are serrations, so I would say likely either Carcharhinus (requiem sharks) or Galeocerdo (tiger shark)

  • Victor Perez posted a new activity comment 2 months ago

    2 months ago
    2 months ago

    It’s a stingray dental plate, family Myliobatidae.

  • Victor Perez posted a new activity comment 2 months ago

    2 months ago
    2 months ago

    Looks like a sand tiger shark, likely the genus Carcharias. Can’t really say anything about the age without knowing where it was found.

  • Victor Perez posted a new activity comment 2 months ago

    2 months ago
    2 months ago

    Hi @charli-higgins, you are in the right ball park in thinking it’s a bullshark. This is an upper tooth from a shark in the genus Carcharhinus. Many species of Carcharhinus have similar teeth, so I don’t think we can say which species unfortunately.

  • Victor Perez posted a new activity comment 2 months, 1 week ago

    2 months, 1 week ago
    2 months, 1 week ago

    It’s a lower tooth of Hemipristis serra (extinct snaggletooth shark).

  • Victor Perez posted a new activity comment 2 months, 2 weeks ago

    2 months, 2 weeks ago
    2 months, 2 weeks ago

    Tortoise spur

  • Victor Perez posted an update in the group Group logo of Bruce’s Paleo-TutorialBruce’s Paleo-Tutorial 2 months, 2 weeks ago

    2 months, 2 weeks ago
    2 months, 2 weeks ago

    We’ve been asked to do the inquiry lesson using fossil kits for pre-service Elementary school teachers again. There are three classes: one on Monday, on Thursday, and on Friday. Ideally, we will have at least 2 presenters per class. Please fill out this Doodle Poll to indicate your availability to help with this classroom visit.…[Read more]

  • Victor Perez posted a new activity comment 2 months, 2 weeks ago

    2 months, 2 weeks ago
    2 months, 2 weeks ago

    The first two are pieces of fossil bone that I can’t quite identify. The last photo is of a horse tooth and an astragalus (ankle bone).

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