This might be Peniculauris bassi which is a very common brachiopod in the Permian Kaibab Formation. See plate 45 figures 1 and 2 in The Environment and History of Toroweap and Kaibab Formations of Northern Arizona and Southern Utah Volume 492 of Carnegie institution of Washington.…[Read more]

It is silicified. I do not know what type of sponge it is. I am looking for an expert to help.

Again it is packed away somewhere so I cannot add a scale. I believe measurements were provided. Sorry. Reference: A contribution to the invertebrate paleontology of the Texas Cretaceous: Texas Geological Survey Fourth Annual Report, pt. 2 by F. W. Craigin

I named it using the mentioned paper. I believe that measurements were provided in the data. Once again it is packed away somewhere so I cannot reshoot it with a scale. I have heard that you can add a scale next to the photo using the measurements provided.

It is packed away in a box somewhere. I am almost positive that the oral side was covered in cemented sand otherwise I would have provided a picture. Please include it in iDig with all associated data.