Nandomas Posted February 5, 2011 Share Posted February 5, 2011 (edited) Hello everybody I acquired (actually I traded for it) this ammonoid in Denver some years ago. The label says: Hartz Range, Australia it measures 10 cm. in diameter sobsob... those are the only words, non genus, no age :phew: Someone can help me? Edited February 6, 2011 by Nandomas Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
Nandomas Posted February 5, 2011 Author Share Posted February 5, 2011 (edited) sometime the attachment doesn't work in the opening post my guess is Lytoceras Edited February 5, 2011 by Nandomas Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
Ludwigia Posted February 6, 2011 Share Posted February 6, 2011 (edited) Ooooo that's a tough one Nando. I'd lean to Lytoceras as well, but the possibilities are manifold without at least the stage or series. Hopefully one of the Aussies takes a peek here. Roger Edited February 6, 2011 by Ludwigia Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Wrangellian Posted February 6, 2011 Share Posted February 6, 2011 There is a 'Hartz Mountains' in southern Tasmania, perhaps L-Mid Triassic.. that's all I can add for now. Link to comment Share on other sites More sharing options...
Nandomas Posted February 6, 2011 Author Share Posted February 6, 2011 Thanks guys. My wife thinks it is some kind of eteromorph, because she saw something very similar from Australia with the spires more open at Munich show Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
Aramon Posted February 7, 2011 Share Posted February 7, 2011 (edited) I'm agree with your wife I vote for Australiceras from Aptian, because of the tuberculated ribs in the inner whorls. Edited February 7, 2011 by Aramon Link to comment Share on other sites More sharing options...
Nandomas Posted February 7, 2011 Author Share Posted February 7, 2011 I'm agree with your wife I vote for Australiceras from Aptian, because of the tuberculated ribs in the inner whorls. Thanks Aramon I really appreciate your help Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
Mike from North Queensland Posted February 21, 2011 Share Posted February 21, 2011 Not being an expert on ammonites and not knowing that area I cant be sure from the photo. Harts fange is in central Australia about 100 miles east of alice springs in the northern territory and is known for gemstones. but would have been part of the early cretacious sea so the ammonite may match some of the ammonites I have picked up in central Queensland. The prepped fossil is labeceras and the one in the moonstone is a Tropeum or at least that how the uni proffeser labeled them. Both these specimens have little bumps on the outter edge as the fossil curves. Do not know how helpful of confusing this will make the identification. Link to comment Share on other sites More sharing options...
Wrangellian Posted February 22, 2011 Share Posted February 22, 2011 That's a different spelling - Harts vs. Hartz -?- I can't tell for sure by the pic but it looks like Hartz on the fossil.. Link to comment Share on other sites More sharing options...
Aramon Posted February 22, 2011 Share Posted February 22, 2011 Not being an expert on ammonites and not knowing that area I cant be sure from the photo. Harts fange is in central Australia about 100 miles east of alice springs in the northern territory and is known for gemstones. but would have been part of the early cretacious sea so the ammonite may match some of the ammonites I have picked up in central Queensland. The prepped fossil is labeceras and the one in the moonstone is a Tropeum or at least that how the uni proffeser labeled them. Both these specimens have little bumps on the outter edge as the fossil curves. Do not know how helpful of confusing this will make the identification. Hello ! Your ammonites are really interesting! What do you mean by "bumps" ? I can see some tubercles on your ammonites, so they are both Autraliceras. The genus Labeceras is restricted to micromorph tripartite ammonites. Your ammonites are close to Tropeum (the external whorls are identical), but Tropeum had NEVER tubercles. In my opinion all these genera of the Lower Aptian need for a strong palaeontological revision... But the material is rather rare (as specialists are!!!). Link to comment Share on other sites More sharing options...
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