Jump to content
  • Acanthodes boyi


    Images:

    hauyn888

    Taxonomy

    Spiny shark

    Kingdom: Animalia
    Phylum: Cordata
    Class: Acanthodii
    Order: Acanthodiformes
    Family: Acanthodidae
    Genus: Acanthodes
    Species: Acanthodes boyi

    Geological Time Scale

    Eon: Phanerozoic
    Era: Paleozoic
    Period: Permian
    Epoch: Cisuralian
    International Age: Sakmarian

    Stratigraphy

    Meisenheim Formation
    Jeckenbacher Subformation

    Biostratigraphy

    Heimkirchen- Niederkirchen Horizon

    Provenance

    Collector: C. Pest
    Acquired by: Field Collection

    Dimensions

    Length: 45 -50 cm

    Location

    Niederkirchen" Hörnchen"
    Heimkirchen, Niederkirchen
    Rhineland-Palatinate
    Germany

    Comments

    Accompanying fauna:

    Orthacanthus senckenbergianus (Lebachacanthus colosseum)

    Aeduella blainvillei

    Apateon sp.

    Acanthodes palatinensis

     

     

    Paläontologische Zeitschrift

    Heidke, Ulrich,

    November 1993, Volume 67, Issue 3–4, pp 331–341| 

    Studien überAcanthodes. 4.Acanthodes boyi n. sp., die dritte Art der Acanthodier (Acanthodii: Pisces) aus dem Rotliegend (Unterperm) des Saar-Nahe-Beckens (SW-Deutschland)

    I edited the Westrichus  because I got information, that this is not a Werstrichus krätschmeri. Mr Kratschmer himself told me when I showed him the fossil in July 2017, that this must be Acanthodes boyi. 




    User Feedback


    I_gotta_rock

    Posted

    Looks like an imprint. What are we looking at here?

    Share this comment


    Link to comment
    Share on other sites

    Hi I_gotta_rock......What do you mean - looks like an imprint? I don´t understand your question!?

    The skull of the fish, the head is folded backwards over the body ....

    Share this comment


    Link to comment
    Share on other sites

    Miocene_Mason

    Posted

    47 minutes ago, hauyn888 said:

    Hi I_gotta_rock......What do you mean - looks like an imprint? I don´t understand your question!?

    The skull of the fish, the head is folded backwards over the body ....

    She probably just didn't see the fossils (it can take a moment to see) and just saw the "imprint" which is the prep around the outline of the fish. 

    Share this comment


    Link to comment
    Share on other sites

    I_gotta_rock

    Posted

    2 hours ago, WhodamanHD said:

    She probably just didn't see the fossils (it can take a moment to see) and just saw the "imprint" which is the prep around the outline of the fish. 

    Yep. No I see it. Had to look at it from the right perspective.

    Share this comment


    Link to comment
    Share on other sites

    sixgill pete

    Posted

    Can some prep work be done to better expose this fossil? It would make it easier to be seen and used as an aide for identification.

    Share this comment


    Link to comment
    Share on other sites

    I think it looks fine? Its just because the head is folded back on its body. And that the bones have turned into a dust towards the back. I don't think theres any more prep work that can be done, won't make it look any better.

    But awesome fossil! You have such an amazing and world class collection. :wub:

    Share this comment


    Link to comment
    Share on other sites

    Thanks a lot for all your posts.

    Acanthodes and Westrichus are - like sharks - also a cartilaginous fish, the only real mineral ones are the fin spines, these are mostly found in the rock also isolated ...- preparing these fishes is really difficult, because there is only a little bit more than nothing to prepare......Normally our permian fossils are black (carbon), but this is" white" and the fossil-material is glued together with the clay-sediment infact of heating by lava. This fossil here is very good and complete. One of the best präparators and collector for german permian fossils -Mr. Kraetscher says:  

    Quote: "Acanthodier (Stachelflosser) This is a very ancient cartilaginous group which splits off the Agnathen (Kieferlose). Their first proven representatives are known since the lower Silur approximately 415 million years ago, the last lived up to the (Elasmobranchier sharks) in the middle Silur, separated from the agnathenes separately from the Agnathen, a group consisting of a dandruff armor from small cubes to diamond shaped scales and the cartilaginous skeleton , The scales show a sculpted enamel surface, and the primitive Acanthodians and Elasmobranchians can only be separated from the Silurian to the lower part by the inner structure of the scales Enstachel, in each case on the two dorsal fins, all Acanthodieres show a fin stick in front of all fins. The skin scaling developed among the Elasmobranchiern to a large variety of highly complex, smallest bone teeth. Acanthodians, on the other hand, formed these scales into small cubes with a smooth surface. Furthermore, a part of the skin scaling in the "sharks" wandered into the mouth and formed the teeth. In the Acanthodians, only a few, miserable teeth are known in individual Devonian species. All the other Acanthodians were probably toothless.
        Here in the Saar-Palatinate Rotliegend, Lower Perm, there is predominantly the last known genus Acanthodes. A few years ago, the Author nor the second genus, Westrichus. This is distinguished by a long float seam on the abdomen opposite Acanthodes (short fin). In his publication "Revision of the Acanthodians (Acanthodii: Piesces) of the South-West Saar-Nahe Basin" (26 pages, 22 Fig., 2 tables), Dr. U. Heidtke published a detailed scientific study of all data known up to 2010 , (In the middle of the POLLICHIA Bad Dürkheim 2011)
      The acanthodians here in the Rotliegend belong in principle to the frequent fossils. However, it is usually only the short-lived 5-10 cm large animals (or their own species) to find, but these in part to thousands. Largely grown individuals of the individual species of about 40 to 80 cm belong to the largest rarities. There are only about 50 individuals of this size class to this day. Most of them are only half preserved and in a bad state of preservation."

     

    ....with this information, maybe you can see the fossil better. Perhaps tomorrow I will take some new pics at daylight.
     

    Share this comment


    Link to comment
    Share on other sites

    sixgill pete

    Posted

    @hauyn888 Thanks for your explanation of this fossil and the species. This is a remarkable fossil, thanks for adding it to the collections section.

    Share this comment


    Link to comment
    Share on other sites

    here

     

    Of course I recognize the good intentions of the author of this post , but there are some of us here who have a slight dislike of referral to

    paywalled articles, while not mentioning the fact that it is paywalled.

     

    Neues Jb (etc)isn't exactly an open access publication.

     

    Most German paleontological publications(Geologica Saxonica among the pleasant exceptions) are paywalled.

    Hauyn's citation leaves something to be desired,but I'm thorougly convinced it is an honest attempt at enlightening

    us , and I don't know how much of a language barrier is possibly in the way here.

    and : Thoroughly nice acanthodid, Hauyn, wish I had it:D

     

    more on "sharkish" Paleozoic fish

     

    brazeaurslae20152210.full.pdf

    riytps.jpg

    Share this comment


    Link to comment
    Share on other sites

    @doushantuo thanks for further informations and the discussion....there is a lot.....

    what do you mean .....language barrier....do you feel, that we have one? .....Not really.

    I posted the Quote of Mr. Krätschmer, because... because I greatly appreciate him as a scientist preparer with his knowledge of the Rhineland - Palatinate Rotliegend. Only a few people have probably found more fossils from the Palatinate, prepared, held in hands and seen as he .... but read for yourself : www.permfossil.de.

    And I believe that a forum like fossilforum.com can only grow and develop with the mutual exchange of information, on a personal level, and also in the new media - from the laity,non- professinal through the specialist, to the studied geoscientist.

     

    Share this comment


    Link to comment
    Share on other sites



    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now

×
×
  • Create New...