Indy Posted September 23, 2011 Share Posted September 23, 2011 (edited) Trachydomia nodosa (Meek & Worthen, 1861) Showy gastropod with prominent nodes Middle Pennsylvanian Series - Desmoinesian Stage Marmaton Group - Altamont Formation Lake Neosho Shale Member - St. Louis, Missouri The abundance is considered common, however, large adult specimens are rarely found. This species is illustrated in Knight (1933) and is listed in Yochelson (1967). There is a partly developed shoulder on the upper part of the whorl that does not have nodes on the adult portion of the shell. The large coarse nodes on the shell are characteristic and they are formed along the growth lines, but on the earlier formed parts of the shell there are rows of nodes roughly aligned at an angle to the growth lines. This species is of special interest because it is the type species for the genus Trachydomia. Knight list the name as Trachydoma, but Yochelson (1967) and the gastropod Treatise use the correct spelling, Trachydomia. References: Knight, 1933, The gastropods of the St. Louis, Missouri, Pennsylvanian outlier: 6, The Neritidae; Journal of Paleontology, v. 7, p. 359-392 Yochelson, 1967, A bibliographic index of North American late Paleozoic Hyolitha, Amphineura, Scaphopoda and Gastropoda; U. S. Geological Survey Bulletin 1210, 271 pages. _______________ Trachydomia nodosa have been reported from the Carboniferous in ONLY 2 states: Missouri (St. Louis area), and New Mexico - My link _______________ Trachydomia have been reported from the Carboniferous of the Untied States: Kansas, Missouri, New Mexico, Ohio, and Texas - My link Trachydomia have been reported from the Permian of Cambodia, China, Greece, Malaysia, Mexico, United States (Nevada, Nevada and Utah, and Wyoming). _______________ Wondering if other members have collected this gastropod Barry . Edited September 24, 2011 by Indy 1 Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
nala Posted September 23, 2011 Share Posted September 23, 2011 Very nice fossil! Link to comment Share on other sites More sharing options...
Roz Posted September 23, 2011 Share Posted September 23, 2011 Wow! That is one gorgeous snail!! What a great addition to your collection.. Welcome to the forum! Link to comment Share on other sites More sharing options...
piranha Posted September 23, 2011 Share Posted September 23, 2011 Thanks for the superb data that accompanies your fantastic fossil. Bravo Barry! Link to comment Share on other sites More sharing options...
FossilDAWG Posted September 24, 2011 Share Posted September 24, 2011 What a beautiful snail! I have collected Trachydomia nodosa from near Taos, New Mexico, but my specimens are smaller, flattened or distorted, and not nearly as photogenic. Don Link to comment Share on other sites More sharing options...
Indy Posted September 24, 2011 Author Share Posted September 24, 2011 What a beautiful snail! I have collected Trachydomia nodosa from near Taos, New Mexico, but my specimens are smaller, flattened or distorted, and not nearly as photogenic. Don Don, thanks for the reply Very interesting because Trachydomia nodosa is only reported from the Carboniferous of Missouri (St. Louis area) and New Mexico. Nice to hear from someone who has found this specific species in New Mexico Other species have been reported from the Carboniferous of Kansas, New Mexico, Ohio, and Texas...And the Permian of Cambodia, China, Greece, Malaysia, Mexico, United States (Nevada, Nevada and Utah, and Wyoming). Hopefully we will hear from others who have collected this interesting gastropod Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
Vordigern Posted September 24, 2011 Share Posted September 24, 2011 thats a beauty, love all the detail! Link to comment Share on other sites More sharing options...
Jocky Posted September 24, 2011 Share Posted September 24, 2011 NEWBIE ALERT !!! I was wondering..... is that the actual snail shell or the cast it left in whatever it was encased in. The reason I ask is that I am getting a bit obsessed with finding gastropods in the desert of Qatar. I am finding what appear to be several different species, supposition based mostly on sizes ranging from fingernail to baseball, but they are mostly made of the the same material as the surrounding limestone landscape ie what was once the snail but now all that exists is the mould it left in the limestone. CHEERS Link to comment Share on other sites More sharing options...
Indy Posted September 24, 2011 Author Share Posted September 24, 2011 NEWBIE ALERT !!! I was wondering..... is that the actual snail shell or the cast it left in whatever it was encased in. The reason I ask is that I am getting a bit obsessed with finding gastropods in the desert of Qatar. I am finding what appear to be several different species, supposition based mostly on sizes ranging from fingernail to baseball, but they are mostly made of the the same material as the surrounding limestone landscape ie what was once the snail but now all that exists is the mould it left in the limestone. CHEERS The snail is the actual fossil and not a mold or cast. When I first became interested in the hobby...I would say "Look at this beautiful gastropod, it has the original shell" Today...I know it isn't the "original shell" but the type and quality of preservation gives the "appearance" of being the original shell At this locality, the type and quality of preservation is outstanding and many fossils look like they might still be alive...Especially, when wet - My link Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
RomanK Posted September 24, 2011 Share Posted September 24, 2011 Nice gastropod, I didn't find any yet but going to do that. Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
2ynpigo Posted September 24, 2011 Share Posted September 24, 2011 I posted a photo on the forum in late December 2010. Do a search on "Mexico gastropods" and you should find the post (they are really from New Mexico, not Mexico. For some reason the search feature of the forum will not let you search using 3 letter or less words). The gastropods in the post are all from a locality near Taos. Don, thanks for the reply Very interesting because Trachydomia nodosa is only reported from the Carboniferous of Missouri (St. Louis area) and New Mexico. Nice to hear from someone who has found this specific species in New Mexico Other species have been reported from the Carboniferous of Kansas, New Mexico, Ohio, and Texas...And the Permian of Cambodia, China, Greece, Malaysia, Mexico, United States (Nevada, Nevada and Utah, and Wyoming). Hopefully we will hear from others who have collected this interesting gastropod Link to comment Share on other sites More sharing options...
Indy Posted September 24, 2011 Author Share Posted September 24, 2011 I posted a photo on the forum in late December 2010. Do a search on "Mexico gastropods" and you should find the post (they are really from New Mexico, not Mexico. For some reason the search feature of the forum will not let you search using 3 letter or less words). The gastropods in the post are all from a locality near Taos. Just below "References" you will see that New Mexico is listed where Trachydomia nodosa have been found...and Mexico is listed where Permian species have been found. You might have overlooked the 2 "My link" pointing to the website with this information Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
Auspex Posted September 24, 2011 Share Posted September 24, 2011 ...For some reason the search feature of the forum will not let you search using 3 letter or less words... On purpose; annoying but necessary. A key word search for "the" could really jam up the server. Sometimes, wrapping something like "New Mexico" in quotes will work in advances search. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Indy Posted September 24, 2011 Author Share Posted September 24, 2011 (edited) I posted a photo on the forum in late December 2010. Do a search on "Mexico gastropods" and you should find the post (they are really from New Mexico, not Mexico. For some reason the search feature of the forum will not let you search using 3 letter or less words). The gastropods in the post are all from a locality near Taos. I have no idea what web page you are referring to stating this snail has been found in NEW Mexico...However, that information is CORRECT. See posted text below References - My link Above posted to point out some may miss the mention of New Mexico or confused by me listing reports of where the genus have been found in the Carboniferous as well as the Permian YES... Trachydomia nodosa have been reported from the Taos area in NEW Mexico By the way...Just below my signature you will see a couple of useful search links to search only pages on our forum . Edited September 24, 2011 by Indy Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
amaltheus Posted September 24, 2011 Share Posted September 24, 2011 Very nice find,geting into gastropods myself. Will post a few next week. If you like gastropods look out for Pleurotomariidae by Wolfgang Fischer. Link to comment Share on other sites More sharing options...
Indy Posted September 24, 2011 Author Share Posted September 24, 2011 In an attempt to simplify where Trachydomia have been found keeping in mind there are a number of different species Trachydomia nodosa have only been reported from Missoui and New Mexico Cambodia - Permian China - Permian Greece - Permian Kansas - Pennsylvanian Malaysia - Permian Mexico - Permian Missouri - Pennsylvanian - (St. Louis area) Trachydomia nodosa Nevada - Permian New Mexico - Pennsylvanian - (Taos area) Trachydomia nodosa Ohio - Pennsylvanian Texas - Pennsylvanian Utah - Permian Wyoming - Permian Looking forward to hearing from others regarding this interesting Carboniferous snail Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
Terry Dactyll Posted September 24, 2011 Share Posted September 24, 2011 Definately a 'showy' gastropod... very nice Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
2ynpigo Posted September 25, 2011 Share Posted September 25, 2011 See My link At least I hope this link works. Never tried to do this before. Else this might work: http://www.thefossilforum.com/index.php/topic/17736-new-mexico-gastropods/page__p__196010#entry196010 Link to comment Share on other sites More sharing options...
Indy Posted September 25, 2011 Author Share Posted September 25, 2011 See My link At least I hope this link works. Never tried to do this before. Else this might work: http://www.thefossilforum.com/index.php/topic/17736-new-mexico-gastropods/page__p__196010#entry196010 Thanks for sharing...Yes, that's Trachydomia nodosa Appears that you and FossilDAWG found this snail at the same locality Intersting...2 members so far posting they have collected this snail from the archived locality near Taos, New Mexico Looking forward to hearing from other members who have found this snail in New Mexico and other areas on this list: - - My link Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
Xiphactinus Posted September 26, 2011 Share Posted September 26, 2011 They are some of the most beautiful snails from that Missouri locality. I've only been lucky enough to find a couple. On some of the specimens, the bumps are black and the snail gray, which would indicate that when alive the bumps were a different color than the rest of the snail. In my mind, the snail is white and the bumps orange. Would look really cool! Link to comment Share on other sites More sharing options...
Indy Posted September 26, 2011 Author Share Posted September 26, 2011 (edited) They are some of the most beautiful snails from that Missouri locality. I've only been lucky enough to find a couple. On some of the specimens, the bumps are black and the snail gray, which would indicate that when alive the bumps were a different color than the rest of the snail. In my mind, the snail is white and the bumps orange. Would look really cool! Hi Scott For those who don't know...Scott was collecting this locality before I lost my mind and devoted well over a decade collecting and studying this fascinating exposure The fossils found at this locality are, for the most part, extremely well preserved and most have the "appearance" of retaining original colors and color banding. Color and "color banding" preservation is a very interesting topic and why this seems to occur is not really understood. Lots of speculation including the common answer that fossil colors are a result of minerals in the soil…That is understood. However, many found fossils from this locality (and a few others) challenge the “All” fossil colors belief This will be the subject of a future post, which will include several images illustrating colors and color banding preservation at this locality along with my personal speculations and reasoning . Edited September 26, 2011 by Indy Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
Paleome Posted July 9, 2020 Share Posted July 9, 2020 On 9/23/2011 at 4:32 PM, Indy said: Trachydomia nodosa (Meek & Worthen, 1861) Showy gastropod with prominent nodes Middle Pennsylvanian Series - Desmoinesian Stage Marmaton Group - Altamont Formation Lake Neosho Shale Member - St. Louis, Missouri The abundance is considered common, however, large adult specimens are rarely found. _______________ Wondering if other members have collected this gastropod Barry . WOW! Thank you so much, Indy. And they are Paleozoic, too! I would agree with others that they are truly beautiful. I have exactly 25 of these. Link to comment Share on other sites More sharing options...
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