This is the only shark/ray tooth that I have seen found (i did not find it) on the Holderness.
It came from Skipsea and was found as an erratic, probably coming from the Cretaceous chalk of Bempton or Flamborough and left behind by a receading glazier many thousands of years ago.
Can someone put a name to it please?
Looks most like Ptychodus latissimus to me. A variety of this species (sometimes classified as a species in its own right), P. paucisulctaus, seems to fit.
... Although on second thoughts this variety is not known from Yorkshire (according to the book 'Fossils of the Chalk'). So I'd just stick with P.latissimus.
Thank's Dan and Quagga for your answers, although i have found sponges, echinoids, crinoides and ammonites from the cretaceous chalk as erratics on the Holderness this is the first shark/ray crushing plate I have witnessed.
I should have taked an image of the reverse because it is covered in bone.
That is a great specimen! The "bone" is without doubt the root of the shark tooth, I have collected a number of these from the chalk and all look similar to that. I agree with the ID of Ptychodus latissimus.
So-long as I have the time tomorow I will take some more images in the daylight and post tomorow evening.
Nice collection, do you have any sharks teeth from the red chalk?
As promised some images of the Ray's Plate, hope they are ok for you.
Got quite a few sponges I would like the ID for as well! but another nite I think.
Thats's brilliant, thank you for the extra images. I have not heard of a Ptychodus tooth found as an arratic before. They are scarce enough in the chalk and to have one survive like this is just incredible.
It is quite a large shark tooth so would have been near the centre of the tooth palate. For obvious reasons it is fairly worn but this has brought out the beautiful internal structure of the tooth.
Thanks again for the pictures. I will be more than happy to help with your sponges.