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Found 124 results

  1. ID for this shark

    Hi there! This is my first post at Fossil Forum, hope this information could help in getting some help to identify this fossil. It was found at a quarry in Vallecillo, Mexico (northeast part, less than 100 kms from Laredo, Texas). The fossils found here belong to the the Vallecillo member from the Agua Nueva formation, aparently from late Cenomanian to early Turonian. The full length including the separate vertebrae is aproximately 29 inches or 74 centimeters. The longest tooth is aproximately 1.4 centimeters long. I was only able to post a single picture, hope it helps.
  2. Ammonite hunt in Northern France

    We are back from a very windy fieldtrip to Cap blanc Nez in France. The wind covered a lot of the rocks with sand and sea foam ( https://en.wikipedia.org/wiki/Sea_foam ) which made fossil hunting rather difficult. We were helped by a local collector in the morning who guided us through the Turonian deposits of this site where we rarely colect, here we got 2 big ammonites. One of them was a Mamites nodosoides, this species as been on my wishlist for a while, so I am very happy with it In the afternoon we prospected the Cenomanian side. her we found the usual Mantelliceras and Scloenbachia ammonites. The prospecting site: ( we did see the coast of the UK on the other side of the channel ) Some of the ammonites we found: The Mammites: pictures of the prepped specimens will follow during the next week.
  3. Rudist ?

    Hi, a friend of mine told me he found some Placentyceras in a place where the geologic ages go from the Albian to the Turonian-Santonian, but most of the stratas of that place are Cenomanian. I believe this fossil is not an ammonite, but rather an Oyster or a rudist. I mostly think about Requienia or Toucasia. The geologic file mention the name of Toncasia bayleia. Do you know if Toncasia is a synonym of Toucasia and do you think i'm right thinking this is a rudist ? Lenght : 7 centimeters.
  4. This saturday the tides were ideal for a whole day of prospection at the foot of the chalk cliffs near Calais. We got there early in the morning when the water was going away from the cliffs. At the parking we were greeted by a veteran collector from this location, he took us along to the northern part of the site in search of big Turonian ammonites. A first for us since we've only collected more to the south in the cenomanian deposits. With his help we did find a couple of ammonites including a big specimen. around 1pm after lunch we parted ways and we went to the southern part of the site in search of cenomanian fossils, most of the beach was covered in sand, making it harder to find some decent boulders on the beach to break open. but the usual Schloenbachia and Mantelliceras ammonites did show up. we ended the day with dinner in a local tavern before heading back home whit a new load of fossils to clean and prepp. A Lewisceras Ammonite: A large Ammonite, I still have to prepp and Id it propperly: the extraction of the large ammonite: A nice find from Natalie: under the sand on the beach Albian deposits are present, but not visible, from time to time som fossils from those banks are washed out deeper in the sea and washed ashore. She found a nice Hoplites ammonite lying around on the beach: more pictures of the area: Schloenbachia varians: Mantelliceras specimens in situ: part of the fossils that made it back home: Pictures of prepped specimens will follow later
  5. Isastrea oblonga (Fleming 1827)

    From the album Slices

    6x3cm. Silicified coral from the area around Tisbury, Wiltshire, UK, known as the "Star Coral". Tithonian, Late Jurassic Portland Group.
  6. Kansas pliosaur skull

    Just got a new paper from ResearchGate It basically describes the dentition morphology of Megacephalosaurus eulerti, a pliosaur from the Turonian Carlile Shale of Kansas. The paper also looks at general aspects of M. eulerti cranial anatomy. The study is based on a beautiful skull housed at the Fort Hays Museum of Natural History (see below). Madzia, D., Sachs, S., & Lindgren, J. (2018). Morphological and phylogenetic aspects of the dentition of Megacephalosaurus eulerti, a pliosaurid from the Turonian of Kansas, USA, with remarks on the cranial anatomy of the taxon. Geological Magazine, 1-16. Abstract of the paper: Megacephalosaurus eulerti is a large macropredatory plesiosaur representing one of the last members of the diverse pliosaurid clade Brachaucheninae. The taxon was established upon a nearly complete skull including the mandible and fragments of the postcranial skeleton originating from the lower middle Turonian (Upper Cretaceous) of Kansas, USA. Owing to its age, reasonable completeness and its state of preservation, M. eulerti bears important anatomical details regarding the last brachauchenines. Here we assess the dentition of the taxon, compare the teeth to those of other thalassophonean pliosaurids and comment on the utility of these results for inferences of the phylogenetic relationships of the last brachauchenines. Additionally, we provide remarks on the cranial anatomy of M. eulerti, revise character scores of this taxon used in current phylogenetic studies and address the phylogenetic relationships within Brachaucheninae. Parsimony analyses, aimed to test different char- acter sampling and tree-search strategy, inferred only a single unambiguous synapomorphy uniting a clade formed by mid- to Late Cretaceous brachauchenines: presence of subcircular rather than subtrihedral/trihedral cross-sectional shape of the teeth. Still, the last brachauchenines (Brachauchenius and Megacephalosaurus) can be roughly characterized by a switch from anisodont to subisodont dentition and reduction of their tooth count. Nevertheless, the overall knowledge of the origin, phylogenetic relationships and distinguishability of brachauchenine pliosaurids remains poor and represents a subject for further extensive studies and modifications in taxon and character sampling. For those who want it, I can send it by email to them
  7. During april i and a friend had the oportunity to spend a few days hunting in cretaceous of Normandy, hunting for echinoids. Day one : We drove from brittany through Le Havre to Saint Jouin de Bruneval and Antifer Cape. (3 hours and a half) We let the car on the beach parking lot and hiked south on the peeble shore looking for fossils in the boulders on the beach. The cliff is cenomanian with a bit of albian at the bottom. You have to look carefully on rocks surface for the familliar spherical shape. I found about 20 urchins but thats about it. No shark tooth, just a poorly preserved ammonite (mantelliceras) and a few rhynchonellas At some point we noticed tide was coming back faster than expected, most likely because of the wind pushing the water back. We had to quicken the pace, and made our way through the slippery covered with algae rocks. We finally managed our way back to the car and took the road to Fécamp where we had booked an hotel for the next 2 nights. some finds of the day : Crassiholaster subglobosus : Crassiholaster subglobosus : Cyclothyris difformis : See the all hunt gallery here http://www.thefossilforum.com/index.php?/gallery/album/2849-haute-normandie-april-2018/ or on my flickr : https://flic.kr/s/aHsmiwWft6
  8. Micraster decipiens - 5

    From the album Haute normandie - April 2018

    Micraster decipiens : a cretaceous echinoid from Saint-Pierre en Port
  9. Micraster decipiens - 4

    From the album Haute normandie - April 2018

    Micraster decipiens : a cretaceous echinoid from Senneville sur Fécamp
  10. Micraster decipiens - 3

    From the album Haute normandie - April 2018

    Micraster decipiens : a cretaceous echinoid from Senneville sur Fécamp
  11. Micraster decipiens - 2

    From the album Haute normandie - April 2018

    Micraster decipiens : a cretaceous echinoid from Senneville sur Fécamp
  12. Micraster decipiens - 1

    From the album Haute normandie - April 2018

    Micraster decipiens : a cretaceous echinoid from Saint-Pierre en Port
  13. Kingena elegans group

    From the album Haute normandie - April 2018

    Kingena elegans : a cretaceous brachiopod from Senneville sur Fécamp
  14. Kingena elegans

    From the album Haute normandie - April 2018

    Kingena elegans : a cretaceous brachiopod from Senneville sur Fécamp
  15. Echinoids : best from the april 2018 hunt

    From the album Haute normandie - April 2018

    Last hunt from Normandy cretaceous : best of echinoids
  16. From the album Haute normandie - April 2018

    Last hunt in cretaceous from Normandy : the whole loot
  17. Echinocorys gravesii - 2

    From the album Haute normandie - April 2018

    Echinocorys gravesii : an echinoid from Normandy cretaceous.
  18. Echinocorys gravesii - 1 -2

    From the album Haute normandie - April 2018

    Echinocorys gravesii : an echinoid from Normandy cretaceous.
  19. Echinocorys gravesii - 1 - 1

    From the album Haute normandie - April 2018

    Echinocorys gravesii : an echinoid from Normandy cretaceous.
  20. Indet shark tooth

    From the album Haute normandie - April 2018

    Indet shark tooth from Normandy cretaceous.
  21. Hello everyone, Tomorrow I'll be going for a day-long field trip to the Turonian chalk of Northern France - but I won't be going to the usual Cap Blanc Nez. Rather, I'll be going to a small exposure of chalk in a forest (near Hesdin). Last time I went, I didn't find much (apart from a few bryozoan fragments and a piece of a cidarid spine) - though I hope that this time, I'll find more material.. I plan to also take a few chalk nodules for me to work on back at home, and potentially find more fossils. I hope that what I find will be able to serve as some sort of "comparative research material" for my MKFRP project. Bucket list: -Echinoderm remains of any kind (except holothuroid or irregular echinoid) -Shark tooth -(I know it's a long shot, but hey) Coniasaur remains I'll of course post a report on TFF after the field trip. Best, Christian
  22. Oyster of Peru

    Famous Oyster fossil from Cajamarca, Peru. Cajamarca is where the Inca imperor Atahualpa was made prisoner by Francisco Pizarro.
  23. Texas, a short while back

    I liked the uncluttered format of this pic,decided to post it
  24. I thought this might be something that would be interesting enough for someone to take a stop a Penn Farm one of these days. Penn Farm in Cedar Hill State Park is a very historic and tranquil place in the rolling hills along the Eagle Ford/Austin Chalk contact that is a much loved attraction in the DFW area. I have been going to Penn Farm since I was a very young child, but in April of 2017 I went there with fossils on my mind. In Febuary I had found an ammonite on a rock used to support the door to a cellar (FIG. 37) but had not looked closely at any of the nearby rocks used as stepping stones. As I was going through Penn Farm enjoying the scenery and sights I also scrutinized any rocks that I saw. When I came upon the New Penn Farm House (see map in FIG. 1) I studied the rocks used as stepping stones and started finding both the gracile and robust forms of Collignoniceras woollgari scattered all over many of the rocks with two rocks in particular having the most specimens. It seems that all of the C. woollgari specimens are just impressions. Not sure why. I have since gone back and studied the rocks closer and have identified them as being from the local Kamp Ranch subunit based on the fauna and matrix type. On the rocks, I have found C. woollgari plates, oyster hash, and on the rock first shown in FIG. 25 I found what appears to be some type of shark tooth. I have also looked more closely at the specimen on one of the rocks used to support the door to a cellar that is right next to the stepping stones and I am pretty sure that it is a very large robust C. woollgari. HGMS’ book Texas Cretaceous Ammonites and Nautiloids does say that C. woollgari can have diameters of 200 mm which would place this specimen well within that range, but it is still the largest specimen of this species that I have seen in person if it is indeed C. woollgari. In July, I talked to a couple park rangers about the rocks and they told me that they were aware of them and that when the Penn family originally build the house in 1876 they specifically chose the rocks with fossils on them. It shows the hardiness of the matrix that these rocks have been trampled upon for 142 years and the fossils are still in decent shape. I know I wouldn’t be able to say the same for the Austin Chalk. Here are the pictures. They were taken on Wednesday, April 18, 2018. A ruler is included in many of the photos for scale. FIG 1: Map of Penn Farm.
  25. Plesiosaur from Morocco

    A revisit to a poorly understood Plesiosaur, Thililua longicollis from the Lower Turonian of Goulmima morocco. No mention of formation but have to believe its the Akrabou Formation of the Kem Kem beds http://rsos.royalsocietypublishing.org/content/5/3/172177 @-Andy- @LordTrilobite @Seguidora-de-Isis
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