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Found 17 results

  1. Sonickmonx

    Lamniform Shark Vertebra

    From the album: Sonickmonx's South Carolina Finds

    I love finding Lamniform vertebra and this is my largest and nicest.
  2. Mikrogeophagus

    Cretoxyrhina vraconensis

    From the album: Pawpaw Formation

    Cretoxyrhina vraconensis, Tarrant Co. Albian, Cretaceous Dec, 2022 Originally had this down as Leptostyrax macrorhiza, but decided Cretalamna appendiculata was a better match after having a second look (lack of wrinkling on labial surface). Edit: Apologies for changing so much. I did a little more research, and it appears that Cretoxyrhina vraconensis is a much better ID.
  3. Mikrogeophagus

    Serratolamna koerti

    From the album: Eocene

    Serratolamna koerti, Burleson Co. Lutetian, Eocene Mar, 2023 I ended up having to take an unexpected trip to A&M this weekend to pick up my brother. Took a quick hunt at the bridge as usual and picked around the fishy layer. I'm so used to finding fingernail sized teeth, I flipped when I wiggled this out. It is now the biggest lamniform in my collection, measuring 40 mm. It's a shame it's worn, but that is to be expected as most of the vertebrate material is reworked at the site.
  4. Mikrogeophagus

    Squalicorax baharijensis

    From the album: Pawpaw Formation

    Squalicorax baharijensis, Tarrant Co. Albian, Cretaceous Feb, 2023 Squalicroax baharijensis on the basis of broad neck and well developed serrations (?). Could be wrong with the serrations. If they are "poorly developed", S. pawpawensis would be the better ID.
  5. Mikrogeophagus

    Serratolamna cf. S. caraibaea

    From the album: Ozan Formation

    Serratolamna cf. S. caraibaea, Travis Co. Campanian, Cretaceous Oct, 2022 Serratolamna is a genus you don't typically associate with the Ozan, but they have been found in the Middle Campanian of West Texas and compare well with these two. These teeth exhibit doubled cusplets and an apparent nutrient groove, a combination not typically seen in other genera of this time and place.
  6. Mikrogeophagus

    Cretalamna catoxodon

    From the album: Grayson/Del Rio Formation

    Cretalamna catoxodon, Denton Co. Cenomanian, Cretaceous Jan, 2023
  7. siteseer

    Parotodus?

    Here's an odd one. I think it's a Parotodus that might be the species, P. oligocaenus, which I have read is valid - something to talk to David Ward about. I bought this around the mid-90's as part of a small lot of teeth from the Suwannee River, Florida. I wasn't sure what it was at the time and Parotodus wasn't an in-demand genus like it is now. The dealer thought this and the other teeth washed out of the Ocala Limestone (Late Eocene). I lost track of this tooth and thought I might've traded it somewhere down the line but found it with another tooth from the same site in a zip-lock in a different box. It measures just over 1 1/8 inches. It looks like some Oligocene Parotodus I've seen. @fossilselachian @MarcoSr @isurus90064 @sixgill pete @Al Dente @sagacious @Northern Sharks
  8. siteseer

    Squalicorax review

    This thread was inspired by Sander's excellent review of his collection of Squalicorax teeth. I have started getting some of my Squalicorax specimens together and a few have been photographed already to provide additional visual references for collectors. I will try to show teeth chronologically (Albian teeth first, then Cenomanian...) from early in the evolution of the genus and on to the time of its last representatives. I start with the two oldest Squalicorax teeth in my collection - a pair of specimens from the Upper Albian-age Pawpaw Formation, Motorola site, Tarrant County, Texas. The first tooth is S. pawpawensis (10mm along the mesial edge) and the second is S. priscoserratus (just over 10mm along the mesial edge).
  9. readinghiker

    Help on this unknown lamniform?

    Hopefully, this will be the last time I post on this fauna until I announce the finished publication! I had originally identified this as a cretodus, but after reviewing Everhart and Welton, I am having very serious doubts as to the validity of this ID. The teeth are both labially and lingually striated. The lingual striations look totally different than the pattern found on the scapanorhynchids. The teeth have accessory cusplets, sometimes two on a side. The base of the teeth are more robust than that of scapanorhynchids, too. As you can tell by the photos, even the worn teeth have pronounced striations. Any help at to identifying these teeth to genus (maybe even species?) level would be wonderful! Thanks!
  10. Hello to all guys!!!, I would like to ask again for help in the ID of some teeth. I´ve been searching in a local university's museum for teeth of the original strata (Upper Paleocene), and I have found a very interesting set of boxes containing a bunch of different teeth, all labeled as "Scapanorhynchus sp.", maybe existing a missidentification. The question would be if any of you guys can ID the pieces and how to differentiate the Scapanorhynchus sp. from Striatolamia striata or Sylvestrilamia teretidens, the options I´m leaning for the ID of the teeth. I would also like to check if you guys @will stevenson , @MarcoSr or @bthemoose have any info about it. You guys are awesome!! The ruler is a 1mm step grid, and I'll try to order them from anterior to posterior (I am aware that each one can be of different taxa), all of them have a stronger or weaker folded surface in lingual side. Any help or info is welcome, thanks guys!!! and greetings from Chile. 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) Finally, this one has the weakest folding:
  11. I live near the western edge of Henderson County in Texas. It's a fairly flat area with few outcrops of any kind exposed, and even when they are, they aren't very fossiliferous. The county just west of me is Navarro County, and it does actually have some formations that hold fossils. But I haven't had much luck finding anything in Navarro County. I keep looking, since it's so close. I did a long hike down a Navarro County creek yesterday. For most of the day, it looked like another of those trips where I just don't find anything. But one thing I've learned about fossil hunting is that even after hours of unproductive searching, it only takes one small spot to make you end up bringing home some cool stuff. Yesterday, I eventually found that small spot. The area I hunted is Wolfe City formation. I just didn't have any luck finding anything in the gravel bars in the creek, or in the outcrops themselves. But I did stumble on an outcrop that had some fossils in the mud just below it. For those who enjoy "Find the fossil", here are some in situ photos. That pick is small. The handle is about 55 mm long.
  12. Chase_E

    Lamniform unindent.

    From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    Lamniform unindent. If you have an idea of the ID please let me know.
  13. Chase_E

    Lamniform unindent.

    From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    Lamniform unindent. If you have an idea of the ID please let me know.
  14. Chase_E

    Lamniform unindent.

    From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    This is a parasymphyseal of some kind. If. you have any ideas, please let me know.
  15. From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    Pseudoscapanorynchus aff. compressidens. I believe this specimen is a symphyseal. Unfortunately the specimen is broken cleanly in half.
  16. Hello everyone, I was wondering what the Maximum size for a late Cretaceous Cretalamna was? I have this tooth from Mississippi which clocks in at 1 29/32” (with root chipping), and can’t find much information as to the largest size that the genus reached in the Cretaceous.
  17. Tony G.

    Squalicorax kaupi

    Collected in gravel in the North Sulphur River near Ladonia, Tx.
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