Mortoniceras equidistans Ammonite Fossil | Cretaceous Texas | Duck Creek Formation | Authentic Fossil with COA
£ 18.00
This listing offers a fine specimen of Mortoniceras equidistans, an ammonite
fossil from the Duck Creek Formation, dated to the Upper Albian Stage of the Cretaceous Period (~105 million years ago). Found at Spring Creek, Cooke County, Texas, USA, this piece is a scientifically recognised ammonite species important for biostratigraphy.You will receive the exact fossil shown in the photo. Please note that the cube in the image = 1cm for scale. The fossil comes with a Certificate of Authenticity, and as always, all of our specimens are 100% genuine.Geological & Taxonomic Overview:
• Fossil Type: Ammonite (extinct cephalopod)
• Species: Mortoniceras equidistans
• Family: Brancoceratidae
• Superfamily: Acanthoceratoidea
• Order: Ammonitida
• Formation: Duck Creek Formation
• Age: Upper Albian, Cretaceous Period
• Location: Spring Creek, Cooke County, Texas, USA
• Depositional Environment: Shallow marine shelf of the Western Interior Seaway
• Biozone: Mortoniceras equidistans is often used within the Upper Albian ammonite biostratigraphic framework
• Formally Described By: Meek (1876)Morphology & Distinctive Features:
• Exhibits a moderately involute, compressed shell with clearly spaced and equidistant ribs—the feature for which it is named
• Ornamented with ventrolateral tubercles and lateral ribs that remain evenly spaced across whorls
• Well-preserved suture lines highlight classic Mortoniceras traits
• High relief against the surrounding matrix makes it ideal for display or studyScientific Importance: Mortoniceras equidistans is notable for its regular ribbing and use in identifying Upper Albian zones across North America and Europe. It represents a transitional form that provides key insights into the morphological evolution of Mortoniceras.Collector Display Appeal:
• Aesthetic shell with well-defined ribs and ornamentation
• Great educational example of Albian ammonite diversity
• Professionally cleaned and conserved for maximum visual and structural integrityWhy Choose Us?
• Each fossil is a 100% authentic specimen
• Comes with a Certificate of Authenticity
• Responsibly sourced, handled with scientific careThis Mortoniceras equidistans ammonite is a perfect addition for any fossil collector, geologist, or educator—combining visual appeal with stratigraphic significance. Own a true relic of Earth's Cretaceous seas today.
fossil from the Duck Creek Formation, dated to the Upper Albian Stage of the Cretaceous Period (~105 million years ago). Found at Spring Creek, Cooke County, Texas, USA, this piece is a scientifically recognised ammonite species important for biostratigraphy.You will receive the exact fossil shown in the photo. Please note that the cube in the image = 1cm for scale. The fossil comes with a Certificate of Authenticity, and as always, all of our specimens are 100% genuine.Geological & Taxonomic Overview:
• Fossil Type: Ammonite (extinct cephalopod)
• Species: Mortoniceras equidistans
• Family: Brancoceratidae
• Superfamily: Acanthoceratoidea
• Order: Ammonitida
• Formation: Duck Creek Formation
• Age: Upper Albian, Cretaceous Period
• Location: Spring Creek, Cooke County, Texas, USA
• Depositional Environment: Shallow marine shelf of the Western Interior Seaway
• Biozone: Mortoniceras equidistans is often used within the Upper Albian ammonite biostratigraphic framework
• Formally Described By: Meek (1876)Morphology & Distinctive Features:
• Exhibits a moderately involute, compressed shell with clearly spaced and equidistant ribs—the feature for which it is named
• Ornamented with ventrolateral tubercles and lateral ribs that remain evenly spaced across whorls
• Well-preserved suture lines highlight classic Mortoniceras traits
• High relief against the surrounding matrix makes it ideal for display or studyScientific Importance: Mortoniceras equidistans is notable for its regular ribbing and use in identifying Upper Albian zones across North America and Europe. It represents a transitional form that provides key insights into the morphological evolution of Mortoniceras.Collector Display Appeal:
• Aesthetic shell with well-defined ribs and ornamentation
• Great educational example of Albian ammonite diversity
• Professionally cleaned and conserved for maximum visual and structural integrityWhy Choose Us?
• Each fossil is a 100% authentic specimen
• Comes with a Certificate of Authenticity
• Responsibly sourced, handled with scientific careThis Mortoniceras equidistans ammonite is a perfect addition for any fossil collector, geologist, or educator—combining visual appeal with stratigraphic significance. Own a true relic of Earth's Cretaceous seas today.
