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Found 32 results

  1. 9/28/19 Trip

    From the album Post Oak Creek

    I found less stuff than last time, but I found a nice centrum and a shard of a mosasaur tooth. A couple teeth grouped with Scapanorynchus may be Serratolamna sp.
  2. Moroccan Squalicorax pristodontus

    Are all these three Moroccan shark teeth all Squalicorax pristodontus? Is there any other Squalicorax Sp. found there?
  3. Squalicorax sp.

    From the album Post Oak Creek

    Squalicorax teeth, likely curvatus and kaupi. Scale bar = 1 cm. Collected 6/21/19.
  4. Squalicorax kaupi

    From the album Sharks

    Two nice S. kaupi teeth.
  5. Extinct Sharks

    Hi everyone. Here i will show two genus of extinct Sharks such as 1.Squalicorax and 2.Cretoxyrhina. If someone is interested,let know Thanks for your time, Darko
  6. I found this tiny Squalicorax tooth yesterday at Ramanessin Brook (Monmouth County, NJ Cretaceous). It's interesting to me because it appears to have a mesial heel (notch) that I've seen on other species of the shark but doesn't have a nutrient groove (which I believe disqualifies it from being Pseudocorax) so I'm trying to figure out what it is. Also, I don't believe Squalicorax bassanii is known from this location but I could be wrong. Thanks! -Frank
  7. I personally own a 1,57" (4cm) Squalicorax tooth from Morocco and was wondering how large they could get. What is the biggest Squalicorax tooth you guys have ever seen or own?
  8. After the Hybodontids, our program starts to transition toward the modern sharks. We introduce lamniform sharks and the cow sharks. We will not be able to spend much time at all on the Cow and Crow Sharks. They only get a brief introduction and a look at the teeth. Squalicorax is an important species for us even though we do not spend a lot of time on it. The students in first few classes we do presentations for will be going home with Squalicorax teeth from Morocco. We would like to spend more time on the Cow sharks eventually but we only have one tooth to show them and we will have to edit content to free up space for them but I will work on that down the road. The primary focus in this section is Scapanorhynchus. The first shark art Carter did was a Goblin and we do give them a lot of time in the presentaton. They look cool and have been around for a long time. We present the kids with a nice assortment of teeth and some cool science. The teeth were important adaptations for catching fish and the snout had the ampullae of Lorenzini for sensing changes in the electro magnetic fields around them. We compare this to the modern hammerhead which we do not cover in the program but gives the kids a sense of how the adaptations of hammerheads work. We also talk about fin structure and being able to tell they were slow swimmers. The extend-o-matic jaw is another adaptation we cover with this species. I am happy with the fossil representations for now though I really want to add more Cow Shark fossils at some point and Anomotodon would also be a good addition. The fossils for the presentation.. Pic 1 Hexanchus andersoni from STH. I know H. andersoni should chronologically fit later but Cow Sharks fit here and this is the only one we have for now. Pic 2- Squalicorax pristodontus from Morocco. This is our largest Squalicorax tooth. The kids will get these teeth to take home so while we do not spend a lot of time on them, the teeth are very important to the program. Pic 3- Scapnorhynchus texanus and Scapanorhynchus puercoensis. Our nice little Goblin Shark display with some of our best teeth. Two of the texanus teeth are over 1.5 inches and the puercoenisis teeth are uncommon I believe and pretty super cool.
  9. I’m very excited by the most recent addition to my shark tooth collection, this chunk of Cretaceous matrix from the Cretaceous deposits around Dallas, Texas. I can see at least 17 squalicorax teeth, 6 Ptychodus teeth and two other unidentified species, plus several other root lobes protruding our, undoubtedly still attached to the blades that are buried within the rock. There are also a few bits of bone scattered throughout. I wonder how so many teeth of so many species could gather and fossilize together in such a way. Side one
  10. I have a question for you all pertaining to a Squalicorax kaupi tooth that I found while hunting with Frank at Ramanessin brook this past summer. I have hunted in thebrooks a fair number of times over the years and have collected a good amout of Squalis in that time. The tooth in question has a feature that I have not seen on any of the other teeth that I have found. Located on the mesial side of the root lobe there are serrations. I wouldn't really call this a cusp per se. I assume that this could be a feature that could very easily be worn off by the nature of being tumbled in the brooks. I have not seen, heard mention of, or read anything about this feature in the past. So my question is, has anybody else seen this, or could this hold some scientific value?
  11. Asking for more squalicorax help

    I have done some more research on the squalicorax that I posted about a few weeks ago. I ended up examining 886 teeth or fragments thereof. Of these, 79 showed a fossilization process in which the serrations (and sometimes the whole cusp) was covered with a white mineral. 48 were so worn that sometimes the serrations could barely be made out. 254 were too small or fragmented to be of any use (which does not preclude that they were of the same species as the rest). The remaining 632 all had the ornamentation that is so unusual. They can be found only on the labial side of the cusp (forgive my previous posts saying that they were on the lingual side...a stupid mistake on my part), and the majority are on the mesial edge of the cusp, although a smaller percentage have the ornamentationon the distal edge, and even fewer have them on both. . There are three types of ornamentation, the least common being a horizontal band below the top of the cusp. The second type consists of a small circular indentation, and can be found anywhere on the serration. The most common is a vertical triangle, with the apex of the triangle towards the top of the serration. I have no clue as to whether this is due to ontological heterodonty, sexual dimorphism, placement within the jaw, or something else. If anybody could check their S. falcatus examples (the closest that these teeth resemble), or any other Coniacian squalicorax, and see if this ornamentation is found beyond the fauna I am working on. I have corresponded with Mike Everhart (Oceans of Kansas), and this is new to him. All help will be greatly appreciated! I will post two pictures here, then two more immediately after. Thanks again! Randy
  12. After stuffing my face into tons of scientific articles on Late Cretaceous Lamniformes, I decided that I'd want to draw some sharks. Here's a drawing of the two infamous sharks of the Niobrara Formation Cretoxyrhina mantelli and Squalicorax falcatus as partners-in-crime. I've made the Cretoxyrhina ≈6-7 meters and the Squalicorax ≈2 meters. As 2 meters would be the same size as a very tall 6'6" human, you could imagine the Squalicorax as the tallest ordinary human and see how much bigger Cretoxyrhina is. I've always felt like Squalicorax would commonly accompany predators like Cretoxyrhina to "help" strip bare the latter's kill (Crow sharks are indeed inferred by scientists as opportunistic feeders or scavengers), almost as if Ginsus had them as little cronies. Also, the common name Crow Shark sounds somewhat similar to crony. Now what if we started a new nickname for Squalicorax as a crony? That would be hilarious and maybe realistic. EXTRAS
  13. Squalicorax Tooth

    From the album North Sulphur River

  14. Brooks of NJ

    Been going to the brooks of NJ for over a year now so once I go through my phone I’ll post some more pics on top of my better finds from there. Today I was fortunate to meet @Trevor and do a little hunting with him. Thanks for showing me some new spots and techniques. Didn't have the best of days but went home with quite a few. Not quite sure what this is. I think it might be a part of a ghost shrimp but could be a concretion. Hopefully @Trevor will post his finds from today in here. All are more than welcome to share experiences and their trips in here also. Thanks for looking - Paul
  15. In late February I went to a site in the Middle/Upper Santonian stage of the Bruceville Chalk Marl Formation, Austin Group, in Ellis county, Texas. While at the site I found a few inoceramids, possibly an anaptychus, and a chunk of rock that looks like it could have mollusk grazing traces on it. Then today I was organizing my collection and picked up the rock with the possible grazing traces. While I was handling the rock I happened to look at the bottom of it and spotted a small Squalicorax sp. tooth, my first tooth from the Santonian. It is 11 mm long and is pretty complete, with the left side of the root being exposed. I am not sure about the right side of the root, but it may still be there under the matrix. I have been trying to put it to a species. From looking through Welton and Farish’s book as well as elasmo.com the most likely candidates seem to be the two paleo-buckets S. “falcatus” and S. “kaupi,” and the species S. lindstormi. I am not terribly familiar with fossil shark teeth, so I am very curious what the more informed members of this forum can say about what species this could be. I am also wondering if the first picture could be of mollusk grazing traces. Would it be a good idea to try to prep it out further? And if so, what would a good strategy be with chalky/marly matrix? FIG 1: Possible mollusk grazing traces on the top of the rock. FIG 2. FIG 3.
  16. New paper on Squalicorax

    New paper out on Albian-Turonian Squalicorax from Australia, including three new species. https://www.tandfonline.com/doi/full/10.1080/03115518.2018.1462401
  17. NSR Binge

    Hi y’all, I’ve been hurting for some good fossil hunting since moving to Memphis and as luck would have it a job put me within 3 hours of NSR. Not to mention the water level reports from last week that I’ve been salivating over. So I hopped in the car and managed to get out and hunt last Friday, Saturday with 2 friends, and Monday.(Sunday I went to Post Oak due to weather lol). Water is still pretty high in most areas and some serious water hiking had to be done to get to the bars. I went in twice and my buddy went all the way in. Most areas where I hunted were undisturbed and fresh for the picking.
  18. Squalicorax ???

    I have recently purchased an associated Squalicorax tooth set from Gove county, Kansas. It is Coniacian in age. However, I have no idea what species it is. These teeth are too gracile for S. falcatus and S. baharijensis. Looks a little bit like S. volgensis, however teeth are too large for it. Any help will be very appreciated.
  19. Eutrichiurides prep

    Recently acquired this piece of rock with some jaw segments, vertebra and teeth in it along with a squalicorax tooth. What is the best way to prep it for display? Should I just leave it alone?
  20. Crow Shark

    A nice example of a Campanian aged S. pristodontus. Though not as large or as nicely preserved as many of the Maastrichtian examples, a nice tooth.
  21. Squalicorax kaupi

    Found in phosphate-rich chalk layer of the Late Cretaceous.
  22. Squalicorax

    Found in Morocco. Late cretaceous in age. Specimen is almost complete.
  23. Squalicorax

    This fossil is around 70 million years old. It's 2.25 cm in height. Specimen is 100% percent complete.
  24. Shark Tooth: Squalicorax???

    Hello there! I recently purchased this tooth. It comes from Khouribga, Morocco (Maastrichtian stage)... It looks like a Squalicorax, but I'm not sure. Help? Thanks a lot, Max
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