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Showing results for tags 'hexanchidae'.
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Id requested: Shark Teeth from Cadzand, NL (Eocene - Plio/Pleistocene)
ziggycardon posted a topic in Fossil ID
Hi, I recenty acquired a bulk of shark teeth found on the beaches of Cadzand, The Netherlands. I think there are around 200 - 300 shark, ray and fish teeth in the bag ranging in age from the Eocene up to the Plio/Pleistocene. A large chunk of the teeth are common species like C. hastalis, Brachycarcharias lerichei & Striatolamia macrota teeth. But there are a few I am not sure about and some I don't even a clue about, so I was hoping some people here might help me out confirm my ID. Thank you in advance! All the ray teeth in the bunch Most of the cowshark teeth in the bunch, I think all of these might be Notorynchus primigenius from the miocene & pliocene Tooth 1: 3 teeth which I believe these are upper jaw teeth of Notorynchus primigenius Tooth 2: A cowshark that looks a little different than the rest, might this be a Hexanchus griseus tooth? (Miocene/Pliocene) Tooth 3: The largest tooth of the bunch, due to it's size I am not really sure to which species it might belong, although I believe it might be a large Sand Tiger tooth. Is it an Araloselachus vorax or do Striatolamia macrota & Isurolamna affinis get this big? Tooth 4: a small tooth with large cusps, only one like it in the bunch, the preservation typical of the eocene teeth from this location so I am guessing it is Eocene in age. But I don't really have a clue for the ID Tooth 5: Galeocerdo sp? Physogaleus secundus? Galeorhinus sp? Tooth 6: I am leaning towards either Anomotodon novus or Sylvestrilamia teretidens Tooth 7: Galeocerdo sp. or Physogaleus secundus Tooth 8: Odontaspis winkleri Tooth 9: worn Physogaleus secundus Tooth 10: Physogaleus secundus? Galeorhinus sp? Tooth 11: Abdounia recticona Tooth 12: Brachycarcharias lerichei Tooth 13: Physogaleus secundus or an Abdounia sp? Tooth 14: Physogaleus secundus? Galeorhinus sp? Tooth 15: I am pretty convinced this is an Eotrigonodon serratus tooth -
Our Shark Education Program- Cows, Crows, and Goblins
fossilsonwheels posted a topic in Member Collections
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.- 15 replies
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