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Found 71 results

  1. Gastropod- Clathospira?

    As with my other posts so far, I should preface this post by saying that the Paleozoic, marine ecosystems, and invertebrates are not generally my primary expertise, so I apologize if I am wildly off base or asking stupid questions. Sadly, I did not find this specimen myself, and so I do not have any particularly useful information on age or location. It was left in a desk drawer along with a collection of other invertebrate fossils, most (if not all) of which are Paleozoic in age. Based on some web-surfing, I came up with a possible identification of Clathospira that is probably completely wrong. Here are the pictures. Thank you in advance for your time and input.
  2. Orthocone nautiloids

    I should preface this post by saying that the Paleozoic, marine ecosystems, and invertebrates are not generally my primary expertise, so I apologize if I am wildly off base or asking stupid questions. Sadly, I did not find these specimens myself, and so I do not have any particularly useful information on age or location. They were left in a desk drawer along with a collection of other invertebrate fossils, most (if not all) of which are Paleozoic in age. I have several different specimens of orthocone nautiloids, and I would love to know if anyone can refine that identification further. To make the situation more difficult, the siphuncle is only preserved in one of the specimens so far as I can tell (first set of photos below). For this specimen, the diameter of the nautiloid is ~3.5 cm (depending on exactly where it is measured), the inner diameter visible on top and the diameter of the siphuncle on the bottom are 4 mm, and the outer diameter is 8 mm. Here are the pictures. Thank you in advance for your time and input. Specimen #1: Specimen #2:
  3. Arms race

    The single figure in this one i found hugely enjoyable. H must just about be the Pixarest(new adjective!!!) cephalopod around fenchelsarsiacephalopoaBiodiversi_MARmon_and_new_sp.pdf About 300 Kb
  4. Strange paleocene mollusc

    What is this strange mollusc? I found it in a creek in the Acquia Formation in Maryland, just outside of DC. In case the photos don't make it clear, this appears to be cylindrical, with a flat base, opening up to a flower-like, open crown. Any thoughts on what it is or how to prep it? Thanks, Matt
  5. mussel man,or:the art of science

    Scientific accuracy in the depiction of zoological specimens????????? Who cares NB :52 Mb!!!!!!!!! NB two: forget P**te*s* edit, hours later: maybe ,approximately two centuries later,I'm not doing Chenu any favours. However,"natural history" was practiced AND perceived differently in previous centuries. The degree of exaggeration/embellishment might differ from specimen to specimen
  6. Are these correctly identified?

    I am hoping I have these correct: #1 - Pleuromeris decemcostata #2 - An oyster, but which one? #3 - A bivalve - Unio?
  7. Portuguese gastropods ID needed

    Hello guys. These gigantic gastropods (?) were found 30 years ago near Lisbon. In a dry river. Not too much geological information to provide. The green mineral was found adjacent to the specimens. The three specimens where meters apart ones from the others. They have a brown/orange/white mineral associated in some parts. Can anyone help with the ID, please? Thanks in advance, Miguel P.S.: the Calymenid is just part of the same collection and it is, of course, from Morocco. No relation with the other fossils.
  8. classical observations

    Thought it would be nice to post an oldie(1922)** yakowecolinteractgastropcrinoidZoolAnzc1922_0291-0294.pdf The author "leans towards" Simroth's theory that commensalism (and/ or mutualism)evolved from "parabiosis*",because the gastropod can sometimes be found attached to the crinoid stele . *apparently:the simple phenomenon of attachment,without connotations about causes or substrate preference . The frequent (obligatory,almost?)co-occurence of the fossils is explained by the life-long interaction itself: when the crinoid dies,the gastropod dies. (probable naticid gastropod boreholes can be found on some "infested" crinoids) The attachment scar of the gastropod are concentric,the gastropod aperture has an excentric location,to keep the aperture covering the anal aperture of the crinoid. The erosion/(resorption?) of the anal proboscis may be due to the gastopod Small circular depressions are tentativel attributed to early ontogenetic failed predation attempts by juvenile gastropod **and I am aware of the more recent literature on this subject havent read yet
  9. functional anatomy of Stylommatophora

    I liked it,but that's no guarantee you will schileyshiley.pdf I've included some illustrated taxa in the tags. It's write-protected so I can't post any outtakes
  10. gastropods do have a price

    unreservedly recommended by me Pricecolumelgastrop(BUSYCON)functmorphconchbiomineralizBull.pdf
  11. Please help us identify the fossil in the picture. It was found near Fernie, British Columbia, Canada.
  12. Publication Request

    Hello all This year I joined the Paleontological Society to have access to the Journal of Paleontology however their archives only go back to 1980. I am looking for a PDF of the following: Valentine, James W. 1959. Pleistocene Molluscan Notes. I. The Bay Point Formation at Its Type Locality Journal of Paleontology, Vol. 33, No. 4 (Jul., 1959), pp. 685-688 Thanks in advance Mike
  13. Small items on a brachiopod shell

    In the Winterset Limestone of the Kansas City Group (Pennsylvanian) there is a section that is thick with Composita brachiopods. On one of these I found the tiny (around 1 mm) items in the pictures. Any help with their identification would be appreciated. Russ
  14. Mollusc plus trilobite

    A mollusc Sinuites plus a free cheek of a trilobite. Any thoughts about the trilobite in question? Thanks in advance, Miguel
  15. old literature

    here it is
  16. cephalopod mineralogy

    mutcleth-isorthocn.pdf The remarks about biomechanics I found informative,but that 's just me. No outtakes,because it 's just SEM pix. Journal credibility:huge!
  17. growing pains?

    the article dogammonoid-shellion.pdf the criticism: landmgrowth-rhythms.pdf outtake:
  18. Taphonomy, quantitative, cephalopoda

    category:awesome This might be extremely useful when read conjointly with the work of Sixto-Lopez. Nautilus rules!!! Why read this? Because of its rigorous and fairly exhaustive treatment of the data,and the great illustrations,of course
  19. Molphyl of Floridan gastropod

    There are those among us who are interested in Floridan Molluscan paleontology. The following ,then ,seems logical enough. snail
  20. Hello, This was collected in Israel from a Campanian site. It is a flint rock. Any help would be highly appreciated. It is as indicated 25 mm in height. Thank you very much in advance, Oz
  21. Sorry about the slight blur around the edges on the photos. I had to much sun light peeping into my prepping shed. I've attached a relevant PDF for the location of the find as well. Goniatites species unknown at present ( any further help would be great ) Description: Fossil Goniatites collected from the Carboniferous Limestone, of Early Carboniferous age from the Cowlow Nik Goniatite Bed in Cowlow Nik, west of Castleton, Derbyshire (Midland England). Period: Carboniferous (Early), Carboniferous Limestone Rock: Carboniferous Limestone The Palaeoecology of the Goniatite Bed at Cowlow Nik, Castleton, Derbyshire, UK. PDF
  22. Poleumita globsa1b.jpg

    From the album Fossil in Matchboxes

    Gastropod Poleumita globosa (Animalia, Invertebrata, Mollusca, Gastropoda) Description: Specimen of a fossil gastropod, Poleumita globosa, collected from the Wenlock Limestone, Much Wenlock, and Salop, UK. It is from the Silurian period (443 - 418 million years ago)

    © D&E

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