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Showing results for tags 'hexanchus andersoni'.
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fossilsonwheels posted a topic in Member CollectionsAfter 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.
whowat13 posted a topic in Questions & AnswersI recently acquired a small "lot" of cow shark teeth from Sacaco, Peru. In the lot was 1 cow shark tooth that measures about 1.6 inches from front to back, and was wondering if there was any occurrence known of teeth from the giant cow shark Notidanidon loozi being found there. Also, in the same lot, there were two cow shark teeth (these may be partials, but are from the leading edge of the tooth) that bear a very strong resemblance to a cow shark species that as far as I know is only found in Bakersfield, CA... Hexanchus andersoni. I would also like an opinion on any occurrence of this species in Sacaco, Peru. I can not take pictures at the moment (my camera is packed for a trip I am going on tomorrow). If anyone can either prove or deny whether these species are found there or not, I would love to hear what you think on the topic. I may be able to take pictures later (when I reach my destination). If I can, I will post them in the ID section tomorrow evening. Thank you all in advance... -Bill H.