Strepsodus Posted March 11, 2020 Share Posted March 11, 2020 Here are two upper Carboniferous Gastrioceras listeri Goniatites from the Lancashire coalfield (UK) which I have in my collection. I would be very interested to see other people’s Carboniferous Goniatites. Thanks, Daniel 7 Link to comment Share on other sites More sharing options...
taj Posted March 11, 2020 Share Posted March 11, 2020 Thanks for posting . I have a few , including some British specimen of the same genera . I shall find the time to make some pics ! Link to comment Share on other sites More sharing options...
Jeffrey P Posted March 11, 2020 Share Posted March 11, 2020 Some goniatites I found a year and half ago when I visited Lost Creek Dam site near Jacksboro, Texas. These are Pennsylvanian from the Finis Shale. 11 1 Link to comment Share on other sites More sharing options...
taj Posted March 12, 2020 Share Posted March 12, 2020 excellent goniatites ! here are mines . First a bunch of english ones Goniatite sp . Yorkshire Gastrioceras Carbonarium , Yorkshire then for the second pic Top :Cravenoceras Berkhi, Russian Federation, Novaia Zemlia, N. Island, Berkha Isl. Left : Goniatites multiliratus ,Oklahoma and Goniatites Choctawensis , Oklahoma Then the biggy to the right is Merocanites sp Kentucky below Indet , probably Maxigoniatites sp .from Morocco Then still to the right, up Two multiblocks from Morocco containing , among others Goniatites Lazarus, Entogonites sp.,Maxigoniatites Saourensis , Prolecanites , Calygirtyoceras,Nomismoceras , etc … below a bigger Maxigoniatites tafilaltensis Morocco To the far right a big one which was labelled agathiceras sp . middle Permian . Morocco . I have some doubt since I could not find references to permian ammonoids in the literature . Therefore I wonder if a/ origin is incorrect ( but it does certainly not look like agathiceras from Timor !) b/ might be a Carboniferous ammonoid 10 2 Link to comment Share on other sites More sharing options...
deutscheben Posted March 15, 2020 Share Posted March 15, 2020 Wow, those are all nice examples! I have 3 late Pennsylvanian goniatites, all collected from a Vermilion County, Illinois site that preserves small shelled marine fauna in concretions. I have honestly no idea what the genus or species of any of these would be, it is still something I need to research. The first one is an incomplete example that just preserves part of one whorl, but it does clearly show the sutures- in the second picture you can also see the external mold of a gastropod. The next one is extremely tiny- ~3-4 mm, and not well-preserved, but it does have an attractive purple tone. The last one is my favorite- another micro-sized one preserved with the same purple color and shine as the previous one, but in better shape- the concretion also contains a nicely detailed bivalve. 7 1 Link to comment Share on other sites More sharing options...
Missourian Posted March 25, 2020 Share Posted March 25, 2020 Some specimens previously posted in other threads (all Pennsylvanian).... Schistoceras sp. Muncie Creek Shale Kansas City metro Schistoceras sp. Winterset Limestone Kansas City, Missouri Somoholites sp. Liberty Memorial Formation Kansas City metro Preshumardites sp. Muncie Creek Shale Johnson County, Kansas Glaphyrites sp. or Eoasianites sp. Muncie Creek Shale Johnson County, Kansas 11 1 Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted March 25, 2020 Share Posted March 25, 2020 Subkargalites sp. Winterset Limestone Jackson County, Missouri Prouddenites sp. Muncie Creek Shale Kansas City metro Glaphyrites sp.? Winterset Limestone, Pennsylvanian Jackson County, Missouri ~2 mm juvenile. These are silicified fossils removed from limestone by muratic acid I'm not sure if all names are correct. 11 1 Context is critical. Link to comment Share on other sites More sharing options...
taj Posted March 26, 2020 Share Posted March 26, 2020 Wow , the baby glaphyrites is neat! Link to comment Share on other sites More sharing options...
Manticocerasman Posted March 28, 2020 Share Posted March 28, 2020 I only have Devonian specimens . Judging by the pictures it might be time for le to start looking for Carboniferous ones. they al look awesome growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
taj Posted March 29, 2020 Share Posted March 29, 2020 you have a " lot " of carboniferous trilobites over there , goniatites should not be that far ! Link to comment Share on other sites More sharing options...
Missourian Posted April 2, 2020 Share Posted April 2, 2020 Compared with ammonites, Pennsylvanian goniatites are just too rare. Context is critical. Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 6, 2020 Share Posted April 6, 2020 Those are very interesting specimens ! The Somoholites is very nice (a very uncommon genus) ! I have some representatives of the genus but only from the Permian of Timor. To taj : Probably a Carboniferous specimen indeed. To my knowledge, the Permian of Morocco is strictly continental. I have a lot of Carboniferous specimens but I did not collect them myself. Photographing them will take a little time. Pictures soon ! Link to comment Share on other sites More sharing options...
taj Posted April 6, 2020 Share Posted April 6, 2020 12 hours ago, Mare Nostrum said: To taj : Probably a Carboniferous specimen indeed. To my knowledge, the Permian of Morocco is strictly continental. Yep , I reached the same conclusion , but the vendor was adamant . Well , not a problem for me ! Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 9, 2020 Share Posted April 9, 2020 Okay guys, I’ve many Paleozoic ammonoids and here I share with you my Carboniferous specimens. I present them from the oldest to the youngest. Today I start with a small series presenting few specimens of the Tournaisian (clearly the least well represented stage in my collection). Weyerella angularia Donggulubasitao Formation Lower Tournaisian Junggar Basin, Xinjiang, China This species was part of the genus Gattendorfia until the creation of the genus Weyerella in 2006. Juveniles (First three images) have more of less circular whorls. Larger specimens have a more compressed conch with higher aperture. Muensteroceras parallelum Rockford Limestone Formation Late Tournaisian Rockford, Jackson County, Indiana 6 2 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 9, 2020 Share Posted April 9, 2020 Muensteroceras oweni Rockford Limestone Formation Late Tournaisian Rockford, Jackson County, Indiana In this specimen, the umbilicus is damaged, but appears to have been proportionally wider than in M. parallelum. The whorls are also proportionnally lower than in M. parallelum. Note the tightening of the septa towards the end of the last whorl. Muensteroceras sp. Borden Formation (Nancy Member) Late Tournaisian Rowan County, Kentucky Next time the Viséan with more specimens :--) 5 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 9, 2020 Share Posted April 9, 2020 7 hours ago, Mare Nostrum said: Muensteroceras oweni Super specimens. Looking forward to tomorrow's Visean selection. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
taj Posted April 9, 2020 Share Posted April 9, 2020 Nice collection! Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 11, 2020 Share Posted April 11, 2020 Thanks ! For the next stage, I only have faunas of three different ages from the Upper Visean. I only show one of them today, the rest of the Visean tomorrow. Maxigoniatites saourensis Mougui Ayoun Formation early Late Visean Dar Kaoua area, Tafilalt, Morocco Specimens in various kind of preservation. First an individual showing neither sutures nor shell ornaments (except constrictions and a very small area preserving the longitudinal lirae). Three specimens showing well preserved longitudinal lirae (and one with transverse growth lines). 3 2 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 11, 2020 Share Posted April 11, 2020 Two specimens with sutures well exposed. Calygirtyoceras darkaouaense Mougui Ayoun Formation early Late Visean Dar Kaoua area, Tafilalt, Morocco 5 1 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 11, 2020 Share Posted April 11, 2020 Calygirtyoceras darkaouaense + Goniatites lazarus juvenile Mougui Ayoun Formation early Late Visean Dar Kaoua area, Tafilalt, Morocco Détail of the juvenile G. lazarus with its fusiform conch which is very different from the adult morphology. Entogonites saharensis Mougui Ayoun Formation early Late Visean Dar Kaoua area, Tafilalt, Morocco Entogonites is a small genus showing juveniles whorls with tetrangular coiling. Later, the whorls develop a more common spiral coiling. Irregular coiling is known in several Paleozoic groups. The Devonian Wocklumeriaceae and Soliclymenia paradoxa show triangular whorls in juveniles and even in adults. In the Carboniferous, juveniles triangular whorls are also present in some taxa of the Orulganitidae, Welleretidae, Delepinoceratidae, and Schistoceratidae (but not Schistoceras itself). In Schistoceratids, juveniles of Branneroceras have sometimes quadrangular whorls. 5 1 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 11, 2020 Share Posted April 11, 2020 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). 5 2 Link to comment Share on other sites More sharing options...
Mare Nostrum Posted April 11, 2020 Share Posted April 11, 2020 Finally some specimens which I am not sure of the identification. Goniatites lazarus or Maxigoniatites tafilaltensis Mougui Ayoun Formation early Late Visean Dar Kaoua area, Tafilalt, Morocco These two I hesitate between Goniatites lazarus and Maxigoniatites tafilaltensis. The two species have similar proportions according to their respective diagnosis. For the first specimen, the shape of the ventrolateral saddle would rather direct me towards G. lazarus. Eoglyphioceras ergchebbiense or Beyrichoceras elabiodense Mougui Ayoun Formation early Late Visean Dar Kaoua area, Tafilalt, Morocco These two species have a similar general morphology and both have biconvex growth lines. We don't see much on the plates of the paper describing the two species. And the sutures are not illustrated because poorly known at the time. However according to the illustrations of the growth lines, the biconvex character would be more marked in E. ergchebbiense. I would tend to favor the latter species for my specimen. 4 1 Link to comment Share on other sites More sharing options...
deutscheben Posted April 11, 2020 Share Posted April 11, 2020 @Missourian, @Mare Nostrum, thanks for sharing your fantastic collections! I love to see the great variety of these less well-known cephalopods. Those juveniles with quadrangular whorls are particularly fascinating. Link to comment Share on other sites More sharing options...
grandpa Posted April 11, 2020 Share Posted April 11, 2020 4 minutes ago, deutscheben said: Those juveniles with quadrangular whorls are particularly fascinating. Yes they are! What's with those? Is this normal for this species? Link to comment Share on other sites More sharing options...
Strepsodus Posted April 11, 2020 Author Share Posted April 11, 2020 All very interesting examples- thanks for showing them. Here is my best Gastrioceras listeri block. It is from the Lancashire coal field, UK. 4 1 Link to comment Share on other sites More sharing options...
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