howard_l Posted October 31, 2012 Share Posted October 31, 2012 A few weeks ago I reported on this Forum that I found the Nautiloid Genus Solenocheilus in area I had not found it before in the lower Mississippian of far northeastern Kentucky. I had found the same genus in abundance further southwest. I had determined the identification of the genus from an old publication which described Solenocheilus kentuckiensis, (Hyatt, 1893) and included plates that were exact matches to what I have found. I am still 99% sure what was described is what I found but it was described over a 100 years ago. I was rechecking some of my identifications and I found recent publications were indicating that Solenochilus (spelled without the (e) after the h) was considered to be restricted to the Pennsylvanian (which I have also found specimens in the Pennsylvanian of southeastern part of KY). I have found other older publications indicating Solenocheilus spelled with an (e) was considered Mississippian (Lower Carboniferous for our European members). The recent literature indicates that Solenochilus (with out an (E)) is Pennsylvanian preceded by Acanthonautilus (upper Mississippian), which had a prominent lateral spines extending from the umbilical area, which made it look like wings. What I found does not have the wings. Going further back to the proper time period (lower Mississippian) there are two more ancestors to Solenochilus, Aipoceras and Asymptoceras. Aipoceras looks similar but the inner whorl is not the same. That brings me to Asymptoceras which is the right age, linage and appearance. So what I have been finding and what was described here in Kentucky 100 years ago as Solenocheilus kentuckiensis is probably Asymptoceras sp. That is assuming that Solenochilus with or with an (e) is definitely restricted to the Pennsylvanian. If anyone knows about any papers that might clear this up please let me know. Photos 1 & 2 Solenocheilus kentuckiensis??? (Asymptocers sp.?) L.Miss. Age, Rowan CO. KY. Photos 3 & 4 Solenocheilus kentuckiensis??? (Asymptocers sp.?) L. Miss. Age, Rowan CO. KY. Photos 5 & 6 Solenocheilus kentuckiensis??? (Asymptocers sp.?) L. Miss. Age, Lewis CO. KY. Photos 7 & 8 Solenocheilus kentuckiensis??? (Asymptocers sp.?) L. Miss. Age, Madison CO. KY. Photos 9, 10, & 11, Solenchilus sp. Magoffin bed Penn. Age, Floyd CO. KY. 1 Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Herb Posted November 1, 2012 Share Posted November 1, 2012 Nice one! That from Hazard? "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
howard_l Posted November 1, 2012 Author Share Posted November 1, 2012 No the last three picks are from Floyd Co. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Herb Posted November 3, 2012 Share Posted November 3, 2012 I have one from the Magoffin near Hazard. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
Missourian Posted November 4, 2012 Share Posted November 4, 2012 Does the siphuncle 'hug' the outer part of the whorl in any of your specimens? That's how I identify Solenochilus in the Pennsylvanian here. 1 Context is critical. Link to comment Share on other sites More sharing options...
howard_l Posted November 4, 2012 Author Share Posted November 4, 2012 Yes, it is very prominent in the lower Mississippian specimens but I think it is a feature of Aipoceras and Asymptoceras as well as Solenocheilus. The picture of the Pennsylvanian age Solenocheilus you can see the siphuncle sticking out at the top outside of the nautiloid. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Missourian Posted November 4, 2012 Share Posted November 4, 2012 Solenocheilus you can see the siphuncle sticking out at the top outside of the nautiloid. I thought I was seeing one in the first image, but I wasn't sure it wasn't a compression fracture. In any case, that is a nice little collection of nautiloids. Context is critical. Link to comment Share on other sites More sharing options...
howard_l Posted November 5, 2012 Author Share Posted November 5, 2012 I just wish there was more information on Mississippian Nautiloids, most of it was publised before I was born. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Herb Posted November 8, 2012 Share Posted November 8, 2012 There's might not be too many of them out there to write a book about. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
howard_l Posted November 8, 2012 Author Share Posted November 8, 2012 I have 5 or 6 genus of nautiloids at least in Madison Co. alone. Rowan Co. has at least 4 or 5 that are completely different and Lewis CO has some. That doesn’t include potential areas in Western KY. The older publications did studies in Michigan, Arkansas and Alaska. It would make someone a great dissertation; I wish I had the time and resources to do it. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Herb Posted November 9, 2012 Share Posted November 9, 2012 I have 5 or 6 genus of nautiloids at least in Madison Co. alone. Rowan Co. has at least 4 or 5 that are completely different and Lewis CO has some. That doesn’t include potential areas in Western KY. The older publications did studies in Michigan, Arkansas and Alaska. It would make someone a great dissertation; I wish I had the time and resources to do it. Please post some more pix for us. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
howard_l Posted November 9, 2012 Author Share Posted November 9, 2012 I will try posting the various nautiloids from the lower Mississippian in Kentucky. First I will start in Lewis Co. along the Ohio River. I have not had a chance to really work this area but you can find Stroboceras sp., Solenochilus? Sp. and Michelinoceras sp. There are probably other genus there but I haven’t found them yet. These Nautiloids are pretty rare but the Ammonoid Muensteroceras sp. is very common in some horizons. Photo 1. Stroboceras sp Photo 2. ., Solenochilus? Sp Photo 3. Muensteroceras sp 1 Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
howard_l Posted November 9, 2012 Author Share Posted November 9, 2012 The next location is in my old stomping grounds on Cave Run Lake in Rowan Co. KY. A different species of Stroboceras sp. Is common but almost always incomplete. Solenochilus? Sp. Again is common but mostly incomplete. Michelinoceras sp. Is by far the most complete but rarely includes but a few chambers besides the living chamber. A rare genus of Discitoceras? Sp. Can be found at the upper layers of the Nancy Member and rare straight nautiloids of Dolorthoceras sp. And Cycloceras sp. Can be found. Photo 1. Stroboceras sp Photo 2. ., Solenochilus? Sp Photo 3. Michelinoceras sp. Photo 4. Discitoceras? Photo 5. Dolorthoceras sp Photo 6. Cycloceras sp. 1 Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
howard_l Posted November 9, 2012 Author Share Posted November 9, 2012 The last area in the lower Borden in Madison Co. KY. There are two areas in Madison Co. around 20 miles apart. The Nautiloid Genus in these areas are vastly different to those to the east. Since the Borden is a prograding deltaic sequence from east to west, the Madison Co. Genus are more than likely slightly younger. The straight nautiloid Michelinoceras sp. Is common and usually much larger but more poorly preserved. A very large ribbed straight nautiloid of Spyoceras sp. Can be found in lower areas of the Nancy in both the Madison Co. areas. Vestinautilus that resembles Discitoceras? Sp of Rowan Co. can be found. A very common genus in lower beds and as well as very well preserved specimens of Epidomatoceras sp. (Trematodiscus trigonus?). Numerous specimens of Maccoyoceras sp. Are also found in the same horizon. Solenochilus? sp. Is very rare and only two specimens have been found in Eastern Madison Co. The straight nautiloids Dolorthoceras sp. Was also found. Thrincoceras kentuckiense (Hyatt, 1893) can be found in the upper most Nancy beds and are very large. Photo 1. Michelinoceras sp. Photo 2. Spyoceras sp. Photo 3. Vesinautilus sp. Photo 4. Epidomatoceras sp. Photo 5. Maccoyoceras sp. Photo 6. Solenochilus? Sp Photo 7. Dolorthoceras sp. Photo 8. . Thrincoceras sp. 1 Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Herb Posted November 10, 2012 Share Posted November 10, 2012 WOW! "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
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