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Found 5 results

  1. Skin? Hoof? Fat and Bone? Help..

    Ok, last one I promise. I have found a few pieces of these fossil bone fragments with an odd type of material attached to them. Rather odd texture, sort of bumpy. My first thought was some type of skin or hoof. I am puzzled. Any ideas? Found in Post oak creek, Grayson Co. Texas Lower Austin, upper Eagle Ford Gulf series.
  2. Hello, I found this beauty in Post Oak Creek last week; and I have absolutely no Idea what this vertebrae could be from. I am used to finding various shark/fish verts in the creek, but nothing such as this. Help! Post oak creek is in Sherman, Tx. Cretaceous, Gulf Series - Upper Eagle Ford, Lower Austin Group. I'll attach more pics below
  3. In late February I went to a site in the Middle/Upper Santonian stage of the Bruceville Chalk Marl Formation, Austin Group, in Ellis county, Texas. While at the site I found a few inoceramids, possibly an anaptychus, and a chunk of rock that looks like it could have mollusk grazing traces on it. Then today I was organizing my collection and picked up the rock with the possible grazing traces. While I was handling the rock I happened to look at the bottom of it and spotted a small Squalicorax sp. tooth, my first tooth from the Santonian. It is 11 mm long and is pretty complete, with the left side of the root being exposed. I am not sure about the right side of the root, but it may still be there under the matrix. I have been trying to put it to a species. From looking through Welton and Farish’s book as well as elasmo.com the most likely candidates seem to be the two paleo-buckets S. “falcatus” and S. “kaupi,” and the species S. lindstormi. I am not terribly familiar with fossil shark teeth, so I am very curious what the more informed members of this forum can say about what species this could be. I am also wondering if the first picture could be of mollusk grazing traces. Would it be a good idea to try to prep it out further? And if so, what would a good strategy be with chalky/marly matrix? FIG 1: Possible mollusk grazing traces on the top of the rock. FIG 2. FIG 3.
  4. This heteromorphic species is characterized by an open plain spiral shape with slightly rursiradiate ribs and 3 sets of tubercles, 2 sets of ventrolateral tubercles, and 1 set of ventral tubercles. The whorl section is compressed and does not have constrictions in United States specimens but does have constrictions in many European specimens. The distance between ribs is roughly the same as the width of a rib. As far as I know, there are only two species reported for this genus, with the other being Phlycticrioceras rude from the late Santonian of France (Kennedy 1995). P. trinodosum is the only species reported in Texas. This species has two distinct forms, with the more commonly found robust form having a lower rib index and the less commonly found gracile form having a higher rib index, both being found at the same stratigraphic level. This possibly indicates very definite sexual dimorphism within this species, perhaps with the robust form being female and the gracile form being male. This particular specimen is a robust form with a rib index of roughly 3 1/2, but some gracile specimens of this species have been known to have a rib index of up to 8. (Emerson 1994). The highest rib index of a P. trinodosum specimen that I have found is 7 on a fragment of a very mature gracile specimen. That specimen (seen here) shows very weak ventrolateral tubercles, probably due to it being the gracile form since I have found multiple robust specimens of about the same maturity that have very clearly defined ventrolateral tubercles. P. trinodosum shows considerable variation in ornamentation between forms. It was broken in two when it separated from the rock shown in the last photo, with its outer whorl being shown in the 4th and 5th photos. The outer whorl is 53mm long, and at the top where the whorl height is measurable, it is 16mm. You can see in the photos of the main part of the specimen, the impression of where its outer whorl once was. The complete specimen would be about 65-70mm in diameter if its outer whorl was still connected. Mine shows a bit of pathology in some places, with two examples being the large gap in between two ribs shown in the 4th and 5th pictures, along with two ribs being very close to each other, which is shown in the 2nd picture. Here are a few references, with the hyperlinked references being underlined. The first 4 references that I have hyperlinked are open access, while the 5th is not open access but can be obtained online without having to request the text from the authors. The 6th reference has to do with the species Phlycticrioceras rude, the only other species in this genus. I have added additional links to sources with information about this paper due to the fact that it is not open access and must be requested. The 7th and 8th references are not open access and are not hyperlinked because I cannot find any way to obtain them online. The last hyperlink is an open access stratigraphic reference for the Austin Chalk and has no information about this genus. When applicable and needed, I have put the relevant pages for information, plates, and text figures at the end of references: Ulrich Kaplan und William James Kennedy (1994). Ammoniten des westfälischen Coniac. Geologie und Paläontologie in Westfalen, Heft 31, 155 S. Pages 53, 54; Tafel 37, Figures 2-4, 9-15 on pages 142, 143; Tafel 43, Figure 3 on pages 154, 155. Zdenek Vašíček (1990). Coniacian ammonites from Štíty in Moravia (Czechoslovakia). Sbornik geologickych ved, Paleontologie 32, Pages 163-195. Pages 177, 179; Plate VI with its explanation is on page 193. Young, K. (1963). Upper Cretaceous Ammonites from the Gulf Coast of the United States. University of Texas, Publication 6304, 373 pp. Pages 45, iv, 39, 47, 371; P. sp. cfr. douvillei on pages 45, iv, 23, 26, 29, 371; Plate 4, figures 2, 3 on pages 150, 151; Plate 11, figure 2 on pages 168, 169; text figure 7 f, h on pages 156, 157. W. J. Kennedy (1984). Systematic Paleontology and Stratigraphic Distribution of the Ammonite Faunas of the French Coniacian. Palaeontological Association, London, Special Papers in Palaeontology, No. 31. Pages 136, 137; Plate 32, figures 4, 11 on pages 140, 141; text figure 42E on pages 146, 147. David L. Clark (1963). The Heteromorph Phlycticrioceras in the Texas Cretaceous. Journal of Paleontology, Vol. 37, No. 2, pp. 429-432. W. J. Kennedy, M. Bilotte and P. Melchior (1995). Ammonite faunas, biostratigraphy and sequence stratigraphy of the Coniacian-Santonian of the Corbieres (NE Pyrenees). Additional links to information concerning this paper can be found here and with the species Phlycticrioceras rude, listed here. Kennedy, W.J. and Cobban (1991). Coniacian Ammonite Faunas from the United States Western Interior. Palaeontological Association, London, Special Papers in Palaeontology, No. 45, 96pp. Barbra L. Emerson, John H. Emerson, Rosemary E. Akers and Thomas J. Akers (1994). Texas Cretaceous Ammonites and Nautiloids. Paleontology Section, Houston Gem and Mineral Society, Texas Paleontology Series Publication No. 5, 438 pp. Pages 285, 286, 388, 422. Ulrich Andrew S. Gale, William James Kennedy, Jackie A. Lees, Maria Rose Petrizzo and Ireneusz Walaszczyk (2007). An integrated study (inoceramid bivalves, ammonites, calcareous nannofossils, planktonic foraminifera, stable carbon isotopes) of the Ten Mile Creek section, Lancaster, Dallas County, north Texas, a candidate Global boundary Stratotype Section and Point for the base of the Santonian Stage. Acta Geologica Polonica, Vol. 57, No. 2, pp. 113-160. The 1st, 2nd, 4th and 8th papers also contain information on the genus Tridenticeras which is found in the Austin Chalk alongside P. trinodosum, just in case anyone is interested in that genus as well. A big thanks to DPS Ammonite. This is my first post to 'Collections' and he helped me get it all straight.
  5. Skin? Please help ID

    Ok, this fossil has me puzzled. It was found in Bois D Arc creek in Bonham; Fannin Co. Texas. Forgive me for not knowing much of the geological info on Fannin Co. Texas, but I think it's in the Austin Group, Late Cretaceous. This piece looks like skin. Veining in sections, and a complex structure all the way through. About 1 1/4" long.
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