Strepsodus Posted April 11, 2020 Author Share Posted April 11, 2020 I believe this to be Dimorphoceras gilbertsoni, though the identification isn’t certain. It is from the Lancashire coal field, UK. 3 Link to comment Share on other sites More sharing options...
Johannes Posted April 11, 2020 Share Posted April 11, 2020 Goniatites fimbriatus, Lower carboniferous, Bad Grund-Quarry, Harz-Mts., Germany 5 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 11, 2020 Share Posted April 11, 2020 Great thread, everybody! Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 12, 2020 Share Posted April 12, 2020 @Strepsodus Very nice Gastrioceras ! Lancashire is well known for its goniatites, some are in an exceptional state of conservation like those of the fauna with Goniatites crenistria . @Deutscheben & Grandpa Thanks ! It’s true Paleozoic ammonoids are under represented on the web. But it is also because the deposits of these periods are very localized and less numerous than those with ammonites of the Mesozoic. Quadrangular whorls is a normal feature in juveniles of Entogonites. It probably reflects a different ecology between juveniles and adults which is not well understood. @Johannes It’s a beautiful specimen ! The sutures are magnificent and we can clearly see the reticulate ornamentation of the shell. Second Visean series : Goniatites multiliratus Caney Shale Formation (Delaware Creek Member) Late Visean Clarita, Coal County, Oklahoma Girtyoceras meslerianum Caney Shale Formation (Delaware Creek Member) Late Visean Clarita, Coal County, Oklahoma 4 1 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 12, 2020 Share Posted April 12, 2020 Platygoniatites rhanemensis Hamou-Rhanem Formation Latest Visean Gara el Itima, Morocco In the first specimen one side of the last volution is lacking allowing to see a rugose ornament named Runzelschicht (wrinkle layer) on the flanks of the dorsal whorl zone. The origin of this ornamentation (limited to a few taxa and only to the largest individuals of the species concerned), is not well known. Recently, some authors have proposed that this ornamentation could be linked to a shell thickening of the body chamber when reaching adulthood and continuing after maturity. Korn, D., Klug, C., and Mapes, R. 2014. The coarse wrinkle layer of Palaeozoic ammonoids: New evidence from the Early Carboniferous of Morocco. Palaeontology 57: 771–781. Hypergoniatites fusiger Hamou-Rhanem Formation Latest Visean Gara el Itima, Morocco 4 1 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 12, 2020 Share Posted April 12, 2020 Epicanites hamianensis Hamou-Rhanem Formation Latest Visean Gara el Itima, Morocco Prolecanites mapesi Hamou-Rhanem Formation Latest Visean Gara el Itima, Morocco 3 1 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 12, 2020 Share Posted April 12, 2020 Megapronorites itimensis Hamou-Rhanem Formation Latest Visean Gara el Itima, Morocco Next time Serpukhovian forms 3 1 Link to comment Share on other sites More sharing options...
taj Posted April 13, 2020 Share Posted April 13, 2020 Those multi bloc late visean stuff form Morocco are sure fascinating . Eolian abrasion have prepared some of them quite nicely . I may start prepping more some of them someday , when I will have time , tools and courage to do so ! Link to comment Share on other sites More sharing options...
Manticocerasman Posted September 22, 2020 Share Posted September 22, 2020 On 11-4-2020 at 12:38 PM, Mare Nostrum said: The other side with orthocone, E. saharensis, Goniatites lazarus, Nomismoceras sp. and Prolecanites sp. (the larger one) In this fossilized paella the largest ammonoids are Prolecanites sp (at the bottom of the picture) and several Entogonites saharensis. There is also a trilobite pygidium (towards the center left). The first specimen shows the begining of a spiral coiling. Here two Entogonites species : E. saharensis and to the right E. bucheri. The second species shows a more involute shell with higher whorls, and a more regular spiral coiling (a faint tetragonal coiling being only present on the third whorl). Those are great, where are they from? growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
cngodles Posted December 5, 2021 Share Posted December 5, 2021 I just pulled this Schistoceras out yesterday. I thought it was a brachiopod. I’ve found 3-4 total in 3 years of searching. Fossils of Parks Township - Research | Catalog | How-to Make High-Contrast Photos Link to comment Share on other sites More sharing options...
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