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  1. L.S., Pecopterid fossils from the Piesberg (Lower Saxony, DEU) are notoriously difficult to ID because the preservation does usually not show the venation (e.g., Josten 1991; PDFs of text and atlas volume). As a group, the pecopterids have also undergone quite substantial taxonomical revisions in the last few years based on material from other localities; not in the least from Mazon Creek (Illinois, USA). This makes identification of my Piesberg-pecopteris a rather daunting endeavour. Perhaps someone on TFF who has experience with the Mazon Creek pecopterids and most current nomenclatural changes would be willing to take a stab at them for me? Images can be enlarged by clicking on them. If photos of specific details are required, let me know and I'll do my best to provide them (but note that venation is often simply not preserved very well). Thanks in advance for any ID suggestions or tips you can provide. Kind regards, Tim Specimens TKTW0048 (left; "Spiropteris sp.") and TKTW0049 (right) Specimen TKTW0542 Specimen TKTW0651 - I'm not even sure this is a pecopterid... Specimen TKTW0826 (left) and TKTW0827 (right) Specimen TKTW1004 Specimen TKTW1078 (left), TKTW1079 (middle) and TKTW1082 (right) - all from same slab of rock (related?) Specimen TKTW1099 - "Spiropteris sp." but what kind of pecopterid is in the foreground? Specimen TKTW1099 - note fertile pinna on the right
  2. Samurai

    Another Broken Paraconularia sp.

    From the album: Missouri Conulariids

    Another broken specimen weathered from the rock. I always find these jellyfish fascinating whenever they present themselves.
  3. Samurai

    Broken Paraconularia sp.

    From the album: Missouri Conulariids

    A lot of my conulariid finds tend to be broken at or near the tip of the apex, even before the attachment which is typical of other conulariid specimens. I am not sure if it is a plane of weakness, a common feature when the animal dies, or simple predation, but when I collected this specimen from the Paola limestone the lower half was missing from the rest of the slab, despite being an almost clean fracture.
  4. I would like to share a beautiful and possibly important crinoid in my collection from the Pennsylvanian Holdenville Formation of Oklahoma, USA. This specimen is best identified as Plaxocrinus sp. aff. P. dornickensis as originally described by Harrell Strimple in his 1961 paper "Late Desmoinesian crinoid faunule from Oklahoma", and confirmed by Pennsylvanian crinoid expert Peter Holterhoff. It was prepared masterfully by Mike Meacher. It is a member of the family "Pirasocrinidae", which is a prevalent group of crinoids especially in the Pennsylvanian. They are characterized by a low, saucer-shaped cup with three anal plates, axillary first primibrachials and various spinosity on the arms, and most notably a prominent highly-specialized "umbrella-like" anal sac that terminates as a platform of plates surrounded by a circlet of laterally-projecting spines. Aside from simply wanting to show off one of my favorite fossils, there are a couple of reasons I think sharing this publicly could be useful. First off, articulated pirasocrinids are generally very rare in the fossil record, especially of this genus. It is thought that these crinoids had weak sutures between plates which made them highly-vulnerable to disarticulation. The vast majority of remains are found as loose anal/brachial spines and occasional calyxes, as shown below. https://snr.unl.edu/data/geologysoils/fossils/nebrinverthughes.aspx Likely because of this, formal descriptions and pictures of pirasocrinid crowns are scarce in the literature and it is difficult to find public references on what articulated specimens look like, especially of how the spines of the arms and anal sac are configured. Though on my specimen the arms are not 100% complete all-around, enough is preserved to describe the full structure of the arms and the nature of the spinose primibrachials. Moreover, the exceptionally-preserved and prepared anal sac shows nearly the full extent of its articulation. Note the couple of near-complete brachial and anal sac spines, whose extraordinary lengths exceed the width of the calyx. The second reason this specimen could be important is more specific. In Strimple 1961, Plaxocrinus sp. aff. P. dornickensis was described on just a single specimen; the calyx shown below: Atypically for the genus, this calyx has a very smooth outline owing to flat, non-bulbous basals and nonimpressed, almost imperceptible sutures. Strimple concluded this species to be closely-related to but not conspecific with true Plaxocrinus dornickensis (which is a slightly older species than the Holdenville fauna, according to Dr. Holterhoff); hence the "aff." in the identification. Essentially, as far as formal description in the literature is concerned, the full crown of this crinoid is unknown. I have also not personally seen any other confirmed crowns of this species from the Holdenville Formation. All-in-all, this specimen could be quite significant for showing the previously-unknown arms and anal sac of Plaxocrinus sp. aff. P. dornickensis on an articulated crown, which might help further its description.
  5. JamieLynn

    A Fossil A Day.....

    A Fossil A Day....keeps the blues away! Or something like that... I started an Instragram account (jamielynnfossilquest) and am posting a fossil a day, so I figured I should do that on here, to REAL fossil enthusiasts! I'm a few days behind, so I will start out with a few more than one a day but then it will settle down to One Fossil (but I will admit, I'll probably miss a few days, but I'll double up or whatever.) I'll start with Texas Pennsylvanian era, but will branch out to other locations and time periods, so expect a little of everything! So enjoy A Fossil A Day! Texas Pennsylvanian Fossils: Nautiloid Agathiceras ciscoense Brachiopod Neochonetes acanthophorus Trilobite Ditomopyge sp. Gastropod Straparollus sp. Bivalve Astartella vera Cephalopod Brachycycloceras sp, Brachiopod Cleiothyridina orbicularis
  6. JurassicMeasures

    Fossil Sites in Western PA?

    Greetings, I’ve recently gotten back into prospecting fossils and I’m looking for some suggestions on sites to visit in western Pennsylvania. I frequently visit Ambridge PA to find fern and Calamite fossils from the Mahoning fm and would like to find more. I also would like to find fossils of early Permian (tetrapods, plants, or invertebrates). I hear that Washington county (south of Pittsburgh) has some great spots and would like to know if it were true. I also would like to show some of my findings from Ambridge as well. Note: I’d like this to be suggested places not just western PA but West Virginia and eastern Ohio as well.
  7. I have a fossil fern (seed fern?) from Kentucky for which I have finally been able to acquire readable close ups of the leaf structure. Members of the Forum have previously been very generous with their advice; however the image was not sufficiently detailed in order to make more definitive suggestions. Various suggestions are that it is possibly a cyclopteris, a neuropteris ovata, or a macroneuropteris scheuchzeri specimen. However, the leaf structure appears to be more robust than images of these types of fossils. With the closeups hopefully a more definitive answer can be found. Suggestions are welcome. The 1st image is of the entire specimen including a neuropteris leaf (disregard the cyclopteris label). The fossil of interest is in the upper right. The remaining images are closeups. Thank you in advance for any suggestions.
  8. Missourian

    Backyard Trip

    My folks have a nice lake behind their house. It is relaxing to spend a warm evening watching a heron spear fish or geese fight each other. Or watch silt slowly fill the lake bed. Across the street, a housing developer stripped off a bunch of soil down to the bedrock, but ran out of money before building on the land. This has resulted in some significant erosion and sedimentation in the lake, but this cloud does have a silver lining. I soon noticed a thick bed of shale exposed on the hill. So it was only a matter of time until I make the short trip to the top. The hill, with exposed shale, can be seen on the right. No, I did not hunt that day. A few weeks ago, I drove up there and poked around the Pennsylvanian strata. The Island Creek Shale is the first bed encountered: There are thin beds of calcareous sandstone within. Oh look, ripple marks: And trace fossils: I've found fusulinids and brachiopods where the shale thins several miles to the south.
  9. Collector9658

    Mooreoceras nautiloid cephalopod

    From the album: Pennsylvanian fossils

    Phylum: Mollusca Class: Cephalopoda Order: Orthocerida Family: Pseudorthoceratidae Genus: Mooreoceras
  10. I’ve been air scribing this piece out and I figured it was a Mooreoceras. However, the ridge going up the front is something I haven’t seen on this species. Is it just squashed a bit? It’s a pointed oval in shape. The length is nearly 3 inches.
  11. I am going to start adding some images of my favorite finds which I call Collection Pieces. Identifications range from maybe, probably to most likely. I've only started to seriously collect over the past year. I've spent a great deal of time studying and learning Geology, as a hobby. I am located in Western Pennsylvania. At first, a map of the area. Anything in bright yellow is the Glenshaw Formation. The Ames Limestone layer exists between the Glenshaw and the Casselman Formations, which is the Orange color on the map. I have yet to explore the Ames Limestone, so I've only found fossils that exist in the marine zones below the Ames. Second and Third, are Metacoceras. The Fourth photo is of another Metacoceras. The id is slightly less likely as I can only see a few of the rounded spines. But I'm pretty sure it is one. Coming up next is a Mooreoceras that I found just this past weekend. I maintain everything on a website, that is listed in my profile. Thank you! Clint
  12. I am attaching images of Pennsylvanian seed ferns that were identified by the collectors. The fossils from Kentucky were generally found in the shale around closed down coal mines on family farms. Hopefully these images may assist others in identifying their specimens. Comments/suggestions/corrections are welcome and I also would appreciate specimen identification beyond the genus level for many of the specimens. The first image is of a Pennsylvanian alethopteris specimen from eastern Kentucky: Pennsylvanian alethopteris from eastern Kentucky. Pennsylvanian cyclopteris (upper right) and macroneuropteris specimens from eastern Kentucky. Pennsylvanian eusphenopteris specimen from eastern Kentucky. Pennsylvanian mariopteris specimen from eastern Kentucky. Pennsylvanian Pecopteris plumosa specimen from Upper Silesia in Poland. Pennsylvanian pecopteris specimen from eastern Kentucky. Pennsylvanian sphenopteris specimen from eastern Kentucky. Pennsylvanian crenulopteris specimen from Mazon Creek, Illinois. A helpful Forum member suggested this could be crenulopteris acadica. This last Pennsylvanian specimen is from Mazon Creek, Illinois identified by one individual as Lobatopteris lamuriana and in addition a helpful Forum member suggested that it is possibly a diplazites unita.
  13. I have found that illuminating photos of cordaites fossils are relatively hard to come by. Hopefully these images will help to rectify the situation. Photos 1 and 2 are of a Cordaites borassifolus Sternberg fossil from the middle Pennsylvanian in Upper Silesia, Poland. I suspect that it is of the trunk and the nice, very fine striations are clearly evident in the close up (Photo2). Photos 3and 4 are of cordaites leaf specimens from the Mazon Creek area that was identified by both helpful Forum members and me. The close up of the Mazon Creek specimen (photo 4) clearly agrees with the literature in that they are strap like leaves, they do not have a prominent central vein and they do have equal, equally spaced veins. The Mazon Creek leaves also appear to be on a branch and sigillarius leaves apparently do not. Photos 5 and 6 are of a fossil from SW Pennsylvania that I have identified as a cordaites fossil. As with the Mazon Creek specimen, it is strap like, it has no prominent central vein and the veins are equal and equally spaced. The quality of the close up in Photo 6 is not the best and you might have better luck enlarging Photo 5.
  14. I have 4 Pennsylvanian stigmaria specimens of which only one was specifically identified as a lepidodendron by the collector. I am hopeful that others might have useful suggestions in terms of better identifying the others. The 1st image is of a Pennsylvanian lepidodendron stigmaria specimen from Kentucky. This is my nicest one because not only is it better identified, it also illustrates rootlets and buttons. Image 2 is of another Pennsylvanian stigmaria from Clintonville, Pennsylvania. This appears to be the most common type of stigmaria that I have seen. Would anyone have suggestion/possibilities that would better characterize this specimen? Images 3 and 4 are a Pennsylvanian stigmaria with a heavily degraded label. Image 4 is a closeup of the specimen in image 3. I was able to decipher parts of the label and it was apparently collected near Middlesboro, Kentucky. The rootlet scars on this specimen are much less three dimensional that the rootlet scars on the specimen in image 2. There may be a comment on the label about the rootlet scars having a spiral character. Would anyone be better able to characterize this specimen? Image 5 is of another Pennsylvanian stigmaria from Kentucky. It has many similarities with the specimen depicted in image 2. I also have one very heavily weathered stigmaria from Oklahoma that is very similar to the ones depicted in images 2 and 5; I didn't think it was worth uploading an image. Comments and suggestions about the others would be appreciated.
  15. Lucid_Bot

    Carboniferous Worm?

    Hello, I found what looks like a worm on a block of limestone too large for me to split. So I took a picture of it. It is about 4 cm. The limestone is Carboniferous, Pennsylvanian and from the Glenshaw Formation. Thanks for the help!
  16. I am attaching images of calamite and annularius specimens in my collection. Because their appears to be some debate among the experts on the relationships between calamites and sphenophyllum and asterophylloides, I am also including images of these specimens. I would welcome comments, suggestions or corrections from viewers. Further species identification would also be appreciated. Image 1 is of a Mesocalamite specimen that was among other Pennsylvanian fossils from Kentucky. Image 2 is of another Pennsylvanian Calamites from Kentucky. Image 3 is of a Pennsylvanian Calamites specimen from Alabama. Images 4 and 5 are Pennsylvanian Annularia leaf specimens from Mazon Creek IL. Image 6 is a Pennsylvanian Annularia radiata specimen from the Westwalian A & B, Lower Silesian in Poland. The contrast between the fossil and the underlying rock is so poor that I did alter the exposure settings in order to better view the fossil. Image 7 is of a Pennsylvanian Sphenophyllum specimen from Mazon Creek IL. Image 8 is of a Pennsylvanian Sphenophyllum cuneifolium specimen from the Westwalian A & B, Baszkirian, Lower Silesian in Poland. Again, because the contrast was so poor, I altered the exposure in an effort to obtain a better picture. Image 9 is of a Pennsylvanian Asterophylloides specimen from eastern Kentucky.
  17. I have 2 Pennsylvanian fossils from Mazon Creek. They have previously been identified as crenulopteris and lobatopteris lamuriana. Presumably the crenulopteris specimen is a seed fern; however, I am unsure about the lobatopteris lamuriana specimen. Presumably the lobatopteris was once labeled as a pecopteris so is it still considered to be a seed fern? Any information or suggestions would be greatly appreciated. The first image is of the lobatopteris specimen, The next image is of the crenulopteris specimen.
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