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Manuanis Ammonite Fossil | Cretaceous Texas | Duck Creek Formation | Upper Albian | Genuine Fossil with COA
Manuanis Ammonite Fossil | Cretaceous Texas | Duck Creek Formation | Upper Albian | Genuine Fossil with COA - Image 2

Manuanis Ammonite Fossil | Cretaceous Texas | Duck Creek Formation | Upper Albian | Genuine Fossil with COA

£21.60

This listing features a scientifically significant and visually captivating Manuanis ammonite fossil, collected from the Duck Creek Formation, in Spring Creek, Cooke County, Texas, USA. This ammonite originates from the Upper Albian Stage of the Cretaceous Period, approximately 105 million years ago.

You will receive the exact fossil shown in the photo, and a Certificate of Authenticity is included. All of our fossils are 100% genuine specimens, professionally cleaned and selected. The cube shown in the image = 1cm. Please refer to the photo for full sizing.

Geological & Scientific Information:

  • Fossil Type: Ammonite (extinct marine mollusc)
  • Genus: Manuanis
  • Family: Brancoceratidae (tentatively assigned based on similar forms)
  • Superfamily: Acanthoceratoidea
  • Order: Ammonitida
  • Geological Formation: Duck Creek Formation
  • Geological Stage: Upper Albian, Cretaceous Period
  • Depositional Environment: Shallow marine shelf (Western Interior Seaway)
  • Location: Spring Creek, Cooke County, Texas, USA

Morphological Characteristics:

  • Moderately involute shell with flattened flanks and rounded venter
  • Finely ribbed surface with faint to moderate tuberculation (tubercles vary by specimen)
  • Distinctive for its symmetry and clean ribbing, separating it from more ornate ammonite types
  • Preserved with great detail showing growth lines and potentially faint suture patterning

Scientific Notes: Manuanis is a lesser-known ammonite genus from the Albian and is notable for its conservative morphology and potential evolutionary significance among brancoceratids. While not widely distributed, it provides important data for refining Upper Albian zonation, especially in the Western Interior.

Collector Value & Presentation:

  • Excellent preservation with good surface detail
  • Natural coloration and contrast for display or educational use
  • A great example of rare Upper Albian ammonite diversity

Why Purchase from Us?

  • All fossils are 100% authentic and responsibly sourced
  • Each item includes a Certificate of Authenticity
  • Hand-selected and professionally prepared for display and study

Add a unique ammonite from the mid-Cretaceous seas of Texas to your collection with this beautiful and rare Manuanis ammonite fossil—ideal for collectors, educators, and natural history enthusiasts alike.

(Actual as seen)

Only 1 left in stock

SKU: UF3562 Category:

Description

This listing features a scientifically significant and visually captivating Manuanis ammonite fossil, collected from the Duck Creek Formation, in Spring Creek, Cooke County, Texas, USA. This ammonite originates from the Upper Albian Stage of the Cretaceous Period, approximately 105 million years ago.

You will receive the exact fossil shown in the photo, and a Certificate of Authenticity is included. All of our fossils are 100% genuine specimens, professionally cleaned and selected. The cube shown in the image = 1cm. Please refer to the photo for full sizing.

Geological & Scientific Information:

  • Fossil Type: Ammonite (extinct marine mollusc)
  • Genus: Manuanis
  • Family: Brancoceratidae (tentatively assigned based on similar forms)
  • Superfamily: Acanthoceratoidea
  • Order: Ammonitida
  • Geological Formation: Duck Creek Formation
  • Geological Stage: Upper Albian, Cretaceous Period
  • Depositional Environment: Shallow marine shelf (Western Interior Seaway)
  • Location: Spring Creek, Cooke County, Texas, USA

Morphological Characteristics:

  • Moderately involute shell with flattened flanks and rounded venter
  • Finely ribbed surface with faint to moderate tuberculation (tubercles vary by specimen)
  • Distinctive for its symmetry and clean ribbing, separating it from more ornate ammonite types
  • Preserved with great detail showing growth lines and potentially faint suture patterning

Scientific Notes: Manuanis is a lesser-known ammonite genus from the Albian and is notable for its conservative morphology and potential evolutionary significance among brancoceratids. While not widely distributed, it provides important data for refining Upper Albian zonation, especially in the Western Interior.

Collector Value & Presentation:

  • Excellent preservation with good surface detail
  • Natural coloration and contrast for display or educational use
  • A great example of rare Upper Albian ammonite diversity

Why Purchase from Us?

  • All fossils are 100% authentic and responsibly sourced
  • Each item includes a Certificate of Authenticity
  • Hand-selected and professionally prepared for display and study

Add a unique ammonite from the mid-Cretaceous seas of Texas to your collection with this beautiful and rare Manuanis ammonite fossil—ideal for collectors, educators, and natural history enthusiasts alike.

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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