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Mortoniceras inflatum Ammonite Fossil | Cretaceous Texas | Duck Creek Formation | Authentic Specimen with COA
Mortoniceras inflatum Ammonite Fossil | Cretaceous Texas | Duck Creek Formation | Authentic Specimen with COA - Image 2

Mortoniceras inflatum Ammonite Fossil | Cretaceous Texas | Duck Creek Formation | Authentic Specimen with COA

£57.60

This listing is for a scientifically significant Mortoniceras inflatum ammonite fossil, discovered in the Duck Creek Formation at Spring Creek, Cooke County, Texas, USA. This fossil dates back to the Upper Albian Stage of the Cretaceous Period, approximately 105 million years ago.

All our fossils are 100% genuine and come with a Certificate of Authenticity. The photo shows the actual specimen you will receive. The cube pictured is 1cm per square—please see the photo for full sizing.

Geological & Taxonomic Information:

  • Fossil Type: Ammonite (extinct marine cephalopod)
  • Species: Mortoniceras inflatum
  • Family: Brancoceratidae
  • Superfamily: Acanthoceratoidea
  • Order: Ammonitida
  • Formation: Duck Creek Formation
  • Geological Stage: Upper Albian, Cretaceous Period
  • Location: Spring Creek, Cooke County, Texas, USA
  • Depositional Environment: Shallow marine shelf environment of the Western Interior Seaway
  • Biozone Use: Mortoniceras inflatum is a key zonal index fossil for the Upper Albian, often used to define the inflatum ammonite biozone
  • Formally Identified By: Meek (1876)

Morphology & Notable Features:

  • Typically inflated, globular shell with wide whorls
  • Prominent ribbing with tubercles (nodes) present on the flanks and ventrolateral shoulders
  • Well-preserved suture patterns characteristic of the genus
  • Thickened outer whorl with some lateral compression near the aperture in mature specimens

Scientific Significance: Mortoniceras inflatum is a globally recognized index species, crucial in correlating marine sequences from Europe and North America. Its distinct morphology and stratigraphic position make it invaluable in Upper Albian biostratigraphy and evolutionary studies within ammonoid lineages.

Collector Display & Educational Use:

  • The fossil is presented exactly as shown in the photo
  • High-contrast matrix highlights the ammonite detail beautifully
  • Perfect for fossil collectors, geology enthusiasts, educational institutions, or museum display

Why Buy from Us?

  • All fossils are 100% genuine and responsibly sourced
  • Comes with a Certificate of Authenticity
  • Professionally cleaned and selected for quality and clarity

This Mortoniceras inflatum fossil is a rare and essential addition to any serious collection—both scientifically significant and visually stunning. Own a piece of ancient Cretaceous marine history today.

(Actual as seen)

Only 1 left in stock

SKU: UF3557 Category:

Description

This listing is for a scientifically significant Mortoniceras inflatum ammonite fossil, discovered in the Duck Creek Formation at Spring Creek, Cooke County, Texas, USA. This fossil dates back to the Upper Albian Stage of the Cretaceous Period, approximately 105 million years ago.

All our fossils are 100% genuine and come with a Certificate of Authenticity. The photo shows the actual specimen you will receive. The cube pictured is 1cm per square—please see the photo for full sizing.

Geological & Taxonomic Information:

  • Fossil Type: Ammonite (extinct marine cephalopod)
  • Species: Mortoniceras inflatum
  • Family: Brancoceratidae
  • Superfamily: Acanthoceratoidea
  • Order: Ammonitida
  • Formation: Duck Creek Formation
  • Geological Stage: Upper Albian, Cretaceous Period
  • Location: Spring Creek, Cooke County, Texas, USA
  • Depositional Environment: Shallow marine shelf environment of the Western Interior Seaway
  • Biozone Use: Mortoniceras inflatum is a key zonal index fossil for the Upper Albian, often used to define the inflatum ammonite biozone
  • Formally Identified By: Meek (1876)

Morphology & Notable Features:

  • Typically inflated, globular shell with wide whorls
  • Prominent ribbing with tubercles (nodes) present on the flanks and ventrolateral shoulders
  • Well-preserved suture patterns characteristic of the genus
  • Thickened outer whorl with some lateral compression near the aperture in mature specimens

Scientific Significance: Mortoniceras inflatum is a globally recognized index species, crucial in correlating marine sequences from Europe and North America. Its distinct morphology and stratigraphic position make it invaluable in Upper Albian biostratigraphy and evolutionary studies within ammonoid lineages.

Collector Display & Educational Use:

  • The fossil is presented exactly as shown in the photo
  • High-contrast matrix highlights the ammonite detail beautifully
  • Perfect for fossil collectors, geology enthusiasts, educational institutions, or museum display

Why Buy from Us?

  • All fossils are 100% genuine and responsibly sourced
  • Comes with a Certificate of Authenticity
  • Professionally cleaned and selected for quality and clarity

This Mortoniceras inflatum fossil is a rare and essential addition to any serious collection—both scientifically significant and visually stunning. Own a piece of ancient Cretaceous marine history today.

Additional information

Era

Cretaceous
Origin

USA

Cretaceous Information

The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.

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