{"id":29828,"date":"2025-07-04T16:58:55","date_gmt":"2025-07-04T19:58:55","guid":{"rendered":"http:\/\/gabrielpaladino.com\/?p=29828"},"modified":"2025-09-15T12:08:42","modified_gmt":"2025-09-15T15:08:42","slug":"trachyceras-multituberculatum","status":"publish","type":"post","link":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/2025\/07\/04\/trachyceras-multituberculatum\/","title":{"rendered":"Trachyceras multituberculatum"},"content":{"rendered":"\n<div>\n  <img decoding=\"async\" src=\"https:\/\/live.staticflickr.com\/65535\/54631540712_5bc47bbd44_k.jpg\">\n  <p><b>Trachyceras multituberculatum<\/b> is an impressive ammonite from the Carnian stage of the Late Triassic, found mainly in the marine rocks of Guizhou Province, southern China. Most fossils are discovered in thin layers of limestone and shale, often as single shells or fragments. This species is important for paleontologists because it serves as an \u201cindex fossil,\u201d helping to date and compare rock layers across different regions of the ancient Tethys Ocean. The best-known examples come from the Xiaowa Formation, especially the famous fossil sites of Guanling and Xingyi, though a few have turned up in neighboring Yunnan and Sichuan. Finding a complete and well-preserved specimen is quite rare\u2014less than 5% of all finds\u2014but even partial or internal molds are prized, especially when they show the unique bumps and ribs that set this species apart. Most Trachyceras fossils from Guizhou are preserved as shiny, pyritized molds, a sign of the oxygen-poor, deep-water conditions that existed over 230 million years ago.<br \/><br \/><b>Scientific classification:<\/b><br \/>Kingdom: Animalia<br \/>Phylum: Mollusca<br \/>Class: Cephalopoda<br \/>Subclass: Ammonoidea<br \/>Order: Ceratitida<br \/>Superfamily: Trachyceratoidea<br \/>Family: Trachyceratidae<br \/>Genus: Trachyceras<br \/>Species: <i>Trachyceras multituberculatum<\/i><br \/><br \/>Era: Mesozoic<br \/>Period: Triassic (Carnian, ~237\u2013227 Ma)<br \/>Origin: Guizhou Province, China<br \/>Diameter of the larger pictured specimen: 44 mm<br \/><br \/>The shell of <i>Trachyceras multituberculatum<\/i> is thick and disk-shaped, with a somewhat triangular cross-section, flat sides, and an angular edge. It\u2019s easily recognized by its strong ribs and rows of spiny bumps (called tubercles), which make it stand out from other ammonites of the time. These ammonites lived in open marine environments alongside a rich variety of marine reptiles\u2014like ichthyosaurs, thalattosaurs, placodonts, and early turtles\u2014and many other ammonites.<br \/><br \/>Although the original shell material is gone, the fossils beautifully capture the characteristic ornamentation and fine details of the species. This type of preservation is the most common way Trachyceras fossils are found today\u2014and such specimens remain highly valued, both for their scientific importance and for the unique glimpse they provide into the ancient marine world.<br \/><br \/><\/p>\n  \n  <p>Photo Taken: July 03, 2025<br \/>\n     <a href=\"https:\/\/flic.kr\/p\/2reAVHJ\">High resolution<\/a><br \/>\n     <a href=\"https:\/\/www.flickr.com\/photos\/93293461@N03\/\">Flickr Gallery<\/a>\n  <\/p>\n<\/div>\n<p><b>Did you like this post?<\/b><\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Trachyceras multituberculatum is an impressive ammonite from the Carnian stage of the Late Triassic, found mainly in the marine rocks of Guizhou Province, southern China. Most fossils are discovered in thin layers of limestone and shale, often as single shells or fragments. This species is important for paleontologists because it serves as an \u201cindex fossil,\u201d [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[2],"tags":[3,521,523,526,635,640,670,1568,1575,1578,2537,2538,2744,2756,2757,2758,2942,2958,3275,3276,3374,3413,4731,4741,4806,4809,4838,4914,5202,5204,5205,5206,5352,5354,5578,5959,5995,5996,6680,6692,6694,6924,7703,7910,8053,8062,8274,8452,8453,8670,8871,9299,9308,9559,9564,10693,10875,11006,11758,11814,11926,12280,12281,12330,12955,13244,13245,13246,13247,13327,13328,14768,14168,14182,14183,14331,14333],"class_list":["post-29828","post","type-post","status-publish","format-standard","hentry","category-related-posts","tag-animals","tag-ammonite","tag-ammonites","tag-ammonoidea","tag-animal","tag-animalia","tag-anoxic-conditions","tag-bilateria","tag-biodiversidad","tag-biodiversity","tag-carnian","tag-carnian-ammonite","tag-cephalopoda","tag-ceratitid","tag-ceratitid-ammonite","tag-ceratitida","tag-china","tag-chinese-ammonite","tag-collectable","tag-collection","tag-conchologia","tag-conquiliologia","tag-eubilateria","tag-eukaryota","tag-evolucion","tag-evolution","tag-extinct","tag-fauna","tag-fosil","tag-fossil","tag-fossil-zone","tag-fossilised","tag-gabriel-paladino-ibanez","tag-gabrielpaladino-com","tag-geology","tag-guanling","tag-guizhou","tag-guizhou-fossil","tag-internal-mold","tag-invertebrado","tag-invertebrate","tag-julian-substage","tag-lophotrochozoa","tag-malacology","tag-marine","tag-marino","tag-mesozoic","tag-mollusca","tag-molluscs","tag-multituberculatum","tag-nature","tag-open-marine","tag-opisthokonta","tag-paleoenvironment","tag-paleontology","tag-protostomia","tag-pyritized-fossil","tag-rare-fossil","tag-science","tag-seashell","tag-shell","tag-species","tag-specimen","tag-spiralia","tag-tethys-domain","tag-trachyceras","tag-trachyceras-multituberculatum","tag-trachyceratidae","tag-trachyceratoidea","tag-triassic","tag-triassic-ammonite","tag-updated","tag-writing","tag-xiaowa-formation","tag-xingyi","tag-zoologia","tag-zoology","has-post-thumbnail"],"tags_input":"#animals,ammonite,ammonites,ammonoidea,animal,animalia,anoxic conditions,bilateria,biodiversidad,biodiversity,Carnian,Carnian ammonite,cephalopoda,Ceratitid,ceratitid ammonite,Ceratitida,china,Chinese ammonite,collectable,collection,conchologia,conquiliologia,eubilateria,eukaryota,evolucion,evolution,extinct,fauna,fosil,fossil,fossil zone,fossilised,Gabriel Paladino Iba\u00f1ez,gabrielpaladino.com,geology,Guanling,Guizhou,Guizhou fossil,internal mold,invertebrado,invertebrate,Julian substage,lophotrochozoa,malacology,marine,marino,mesozoic,mollusca,molluscs,multituberculatum,nature,open marine,opisthokonta,paleoenvironment,paleontology,protostomia,pyritized fossil,rare fossil,science,seashell,shell,species,specimen,spiralia,Tethys domain,Trachyceras,Trachyceras multituberculatum,Trachyceratidae,Trachyceratoidea,Triassic,Triassic ammonite,Updated,writing,Xiaowa Formation,Xingyi,zoologia,zoology","jetpack_shortlink":"https:\/\/wp.me\/phjlBv-7L6","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":22717,"url":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/2024\/05\/09\/cleoniceras-species\/","url_meta":{"origin":29828,"position":0},"title":"Cleoniceras species","author":"Gabriel Paladino Ib\u00e1\u00f1ez","date":"May 9, 2024","format":false,"excerpt":"Ammonites are a group of extinct molluscs which somewhat resembled a shelled squid when they were alive.These ancient sea creatures had tentacles like the modern octopus, and spiral shells like Nautilus creatures. They first appeared on the fossil record 240 million years ago, in the Triassic Period, and died out\u2026","rel":"","context":"In &quot;Related posts&quot;","block_context":{"text":"Related posts","link":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/category\/related-posts\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":32005,"url":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/2025\/07\/23\/ataxioceras-discobolum\/","url_meta":{"origin":29828,"position":1},"title":"Ataxioceras discobolum","author":"Gabriel Paladino Ib\u00e1\u00f1ez","date":"July 23, 2025","format":false,"excerpt":"Ataxioceras discobolum is a species of ammonite from the Late Jurassic, specifically the Unter\u2011Kimmeridgian (approximately 155\u2013153\u202fMa). It is found in the marine sediments of the Kulmbach\u2013Kirchleus area, in the Franconian Alb (Bavaria, Germany), a classic locality for Kimmeridgian studies in Europe. The shell of this ammonite is moderately evolute and\u2026","rel":"","context":"In &quot;Related posts&quot;","block_context":{"text":"Related posts","link":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/category\/related-posts\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":31627,"url":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/2025\/07\/20\/quenstedticeras-species\/","url_meta":{"origin":29828,"position":2},"title":"Quenstedticeras species","author":"Gabriel Paladino Ib\u00e1\u00f1ez","date":"July 20, 2025","format":false,"excerpt":"Quenstedticeras is a genus of ammonites from the Late Middle Jurassic, specifically the Callovian stage, approximately 164 to 161 million years ago. Its fossils are especially abundant in the marine clays of the Dubki Clay Quarry, near Saratov, southwestern Russia\u2014one of the most productive and best-preserved Middle Jurassic ammonite localities\u2026","rel":"","context":"In &quot;Related posts&quot;","block_context":{"text":"Related posts","link":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/category\/related-posts\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":30902,"url":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/2025\/07\/14\/catacoeloceras-species\/","url_meta":{"origin":29828,"position":3},"title":"Catacoeloceras species","author":"Gabriel Paladino Ib\u00e1\u00f1ez","date":"July 14, 2025","format":false,"excerpt":"Catacoeloceras is a genus of ammonite that lived during the Early Jurassic, specifically in the Toarcian stage, approximately 183 to 175 million years ago. Its fossils are characteristic of the marine deposits of Millau, in the Aveyron department of France, a classic European locality for Jurassic paleontology. These ammonites are\u2026","rel":"","context":"In &quot;Related posts&quot;","block_context":{"text":"Related posts","link":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/category\/related-posts\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":30352,"url":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/2025\/07\/09\/amaltheus-gibbosus\/","url_meta":{"origin":29828,"position":4},"title":"Amaltheus gibbosus","author":"Gabriel Paladino Ib\u00e1\u00f1ez","date":"July 9, 2025","format":false,"excerpt":"Amaltheus gibbosus is a species of ammonite from the Early Jurassic, more precisely from the Pliensbachian stage, around 190 to 183 million years ago. Due to its rapid evolution and wide geographic distribution, it serves as an excellent index fossil, helping geologists date rock layers with high precision.Its fossils are\u2026","rel":"","context":"In &quot;Related posts&quot;","block_context":{"text":"Related posts","link":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/category\/related-posts\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":37102,"url":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/2026\/06\/07\/epimayaites-species\/","url_meta":{"origin":29828,"position":5},"title":"Epimayaites species","author":"Gabriel Paladino Ib\u00e1\u00f1ez","date":"June 7, 2026","format":false,"excerpt":"Epimayaites is a genus of ammonites from the Late Jurassic, specifically the Oxfordian stage, approximately 163 to 157 million years ago. Its fossils are found in the marine limestones and marls of southwestern Madagascar \u2014 one of the richest Oxfordian ammonite sites in the Indian Ocean region. Specimens of Epimayaites\u2026","rel":"","context":"In &quot;Related posts&quot;","block_context":{"text":"Related posts","link":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/category\/related-posts\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/posts\/29828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/comments?post=29828"}],"version-history":[{"count":1,"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/posts\/29828\/revisions"}],"predecessor-version":[{"id":34256,"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/posts\/29828\/revisions\/34256"}],"wp:attachment":[{"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/media?parent=29828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/categories?post=29828"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/pelecyphora.ddns.net:60123\/GabrielPaladino.com\/wp-json\/wp\/v2\/tags?post=29828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}