Missourian Posted November 21, 2012 Share Posted November 21, 2012 I'll start with images I've already posted on the forum. All are from the Kansas City metropolitan area. Winterset Limestone.... Metacoceras: Liroceras: Stenodomatoceras: Undetermined: Domatoceras umbilicatum: Wea Shale.... Metacoceras: Westerville Limestone.... Domatoceras: Chanute Shale.... Mooreoceras or Pseudorthoceras: Liberty Memorial Shale.... Metacoceras: I'll add many more images in the future. 2 Context is critical. Link to comment Share on other sites More sharing options...
glacialerratic Posted November 21, 2012 Share Posted November 21, 2012 Very nice! The Domatoceras is super! Link to comment Share on other sites More sharing options...
Terry Dactyll Posted November 21, 2012 Share Posted November 21, 2012 Fabulous specimens... Thanks for sharing them...Tim can have the Domatoceras... I'm drawn to the Stenodomatoceras:.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
nala Posted November 21, 2012 Share Posted November 21, 2012 Wow! great specimens! Link to comment Share on other sites More sharing options...
Fossildude19 Posted November 21, 2012 Share Posted November 21, 2012 I agree with the majority - awesome finds. There's something about those spirals of nautiloids,ammonites, and gastropods that pleases my eyes. Thanks for posting them. I had no idea there were so many around in the Pennsylvanian. Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
trilobiteruss Posted November 21, 2012 Share Posted November 21, 2012 Very nice finds, awesome specimens! Link to comment Share on other sites More sharing options...
Missourian Posted November 21, 2012 Author Share Posted November 21, 2012 (edited) This next one is my most remarkable specimen. Undetermined G. sp. Westerville Limestone Jackson County, Missouri What appears to be a color pattern preserved on the shell is actually encrustations of calcite. My guess is that the original color pattern somehow influenced the mineral growth. What do you think? Edit: The slight asymmetry of the markings makes me wonder if this is instead a bellerophontid gastropod. Edited November 21, 2012 by Missourian 1 1 Context is critical. Link to comment Share on other sites More sharing options...
Grenzton Posted November 21, 2012 Share Posted November 21, 2012 (edited) Wow, very nice specimen, my favorites are the Metacoceras and the Stenodomatoceras! Thanks for sharing Karl Edited November 21, 2012 by Grenzton I want to die sleeping like my grandfather, not screaming like his passenger! Link to comment Share on other sites More sharing options...
Missourian Posted November 22, 2012 Author Share Posted November 22, 2012 (edited) As you may have noticed, the most common fossils tend to be the most 'boring'. That isn't the case with nautiloids in KC. Metacoceras is the most frequently encountered coiled cephalopod, and it happens to be my favorite. This one is from the Winterset Limestone of Jackson County, Missouri: The remaining shell is encrusted with algae: Tainoceras is not nearly as common: It is similar to Metacoceras, but it has four sets of bumps instead of two: I found this in the Merriam Limestone in Parkville, Missouri. Edited November 22, 2012 by Missourian 2 Context is critical. Link to comment Share on other sites More sharing options...
Rob Russell Posted November 22, 2012 Share Posted November 22, 2012 Great finds Missourian! A couple of ceph's you may consider for your undetermined specimen are Muensteroceras and Eoasianites. Then again, I may be way off. Finding my way through life; one fossil at a time. Link to comment Share on other sites More sharing options...
astron Posted November 22, 2012 Share Posted November 22, 2012 Excellent collection Astrinos P. Damianakis Link to comment Share on other sites More sharing options...
Missourian Posted November 23, 2012 Author Share Posted November 23, 2012 Temnocheilus Westerville Limestone Jackson County, Missouri: Knightoceras (abundum?) Winterset Limestone Jackson County, Missouri: Condraoceras? Winterset Limestone Jackson County, Missouri: 2 Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted November 23, 2012 Author Share Posted November 23, 2012 Great finds Missourian! A couple of ceph's you may consider for your undetermined specimen are Muensteroceras and Eoasianites. Then again, I may be way off. I would be thrilled if it was an ammonoid. So far, I can't tell if sutures are present or not. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted November 23, 2012 Author Share Posted November 23, 2012 (edited) Liroceras with a complete living chamber Winterset Limestone Jackson County, Missouri: When this nautiloid reached a certain size, it developed a chevron-shaped ridge on the base of the living chamber: Edited November 24, 2012 by Missourian 1 1 Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted November 23, 2012 Author Share Posted November 23, 2012 (edited) Ephippioceras Winterset Limestone Jackson County, Missouri: Ephippioceras is similar to Liroceras, but it has chevron-shaped sutures: Edited November 23, 2012 by Missourian 1 Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted November 24, 2012 Author Share Posted November 24, 2012 This one appears to be intermediate between Stenodomatoceras and the first 'undetermined' shown above: Domatoceras umbilicatum: I used to call this Titanoceras, now I'm not sure: Both are from the Winterset Limestone in Jackson County. 1 1 Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted November 25, 2012 Author Share Posted November 25, 2012 (edited) Domatoceras inner whorl Westerville Limestone Jackson County, Missouri: Solenochilus Dewey Limestone Miami County, Kansas: Solenochilus is easy to identify by its robust form and siphuncle that hugs the outer part of the whorl. My largest orthocone Winterset Limestone Jackson County, Missouri: Crushed orthocone shell Liberty Memorial Shale Johnson County, Kansas: The orthocones are either Mooreoceras or Pseudorthoceras. As far as I know, there is no way to tell unless the siphuncle can be seen. Mooreoceras has a simple, straight siphuncle, while that of Pseudorthoceras is similar to a string of beads and is somewhat wider. These fragments are Pseudorthoceras: They are from the Chanute Shale of Platte County, Missouri. Edited November 25, 2012 by Missourian 2 1 Context is critical. Link to comment Share on other sites More sharing options...
cngodles Posted August 9, 2023 Share Posted August 9, 2023 Perhaps well known by now, but Kröger and Mapes (2005) declared Mooreoceras invalid after being unable to find a difference between it and Pseudorthoceras. https://www.jstor.org/stable/4095072 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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