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Rare Subastiera sulcosa Fossil Ammonite, Lower Hauterivian, Cretaceous, Madagascar - Genuine Fossil with Certificate of Authenticity

Rare Subastiera sulcosa Fossil Ammonite, Lower Hauterivian, Cretaceous, Madagascar – Genuine Fossil with Certificate of Authenticity

Original price was: £18.00.Current price is: £16.20.

This Rare Subastiera sulcosa Fossil Ammonite is a unique specimen from the Lower Hauterivian stage of the Cretaceous period, discovered in Madagascar. The fossil is a 100% genuine specimen, accompanied by a Certificate of Authenticity. The Subastiera sulcosa ammonite is a rare and exceptional example of ancient marine life, showcasing the distinct features that make it a sought-after piece for collectors and enthusiasts of Cretaceous ammonites.

Geology and Fossil Type

  • Geological Stage: Lower Hauterivian, Cretaceous
  • Depositional Environment: Marine (The Lower Hauterivian period was part of a warm, shallow marine environment, conducive to the preservation of ammonites and other marine organisms in regions like Madagascar.)
  • Family: Turrilitidae (A family of ammonites, known for their coiled and smooth spiral shells)
  • Superfamily: Ammonoidea
  • Order: Ammonitida (Part of the Cephalopoda class, related to modern squid and octopus)

Morphology Features

The Subastiera sulcosa ammonite features a distinct spiral shell with smooth coiling and clear suture lines. The smooth surface of the shell, combined with the large, coiled shape, gives this ammonite its characteristic appearance. The ribbing on the shell is subtle but adds texture to the otherwise smooth spiral. The suture lines inside the shell reveal details of its internal structure, giving insight into the buoyancy control that allowed this ammonite to thrive in the marine environment.

Notable Features

This ammonite is notable for its exceptional preservation and its unique spiral shape. The Subastiera sulcosa species is not commonly found in the fossil record, making it a rare find. Its well-preserved condition, along with its smooth curvature and clear suture lines, make it a standout example of Lower Hauterivian ammonites. The marine adaptation of this species is reflected in the shape of its shell, which would have enabled it to navigate the shallow seas of the Cretaceous period.

Size and Presentation

  • Scale Cube: 1cm
  • Full sizing is provided in the photos, so you can see the exact size of the ammonite.
  • Actual Fossil: The fossil pictured is the exact piece you will receive.

Key Selling Points

  • 100% Genuine Fossil
  • Comes with a Certificate of Authenticity
  • A rare Subastiera sulcosa ammonite from the Lower Hauterivian, Cretaceous period
  • Distinct spiral shape, smooth coiling, and suture lines
  • Perfect for collectors and those interested in Cretaceous ammonites and marine fossils

This Rare Subastiera sulcosa Fossil Ammonite from Madagascar offers a rare glimpse into the Lower Hauterivian stage of the Cretaceous period. Its fine preservation, smooth spiral shape, and clear suture lines make it a valuable addition to any fossil collection, particularly for those with an interest in Cretaceous ammonites and marine life.

(Actual as seen)

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Description

This Rare Subastiera sulcosa Fossil Ammonite is a unique specimen from the Lower Hauterivian stage of the Cretaceous period, discovered in Madagascar. The fossil is a 100% genuine specimen, accompanied by a Certificate of Authenticity. The Subastiera sulcosa ammonite is a rare and exceptional example of ancient marine life, showcasing the distinct features that make it a sought-after piece for collectors and enthusiasts of Cretaceous ammonites.

Geology and Fossil Type

  • Geological Stage: Lower Hauterivian, Cretaceous
  • Depositional Environment: Marine (The Lower Hauterivian period was part of a warm, shallow marine environment, conducive to the preservation of ammonites and other marine organisms in regions like Madagascar.)
  • Family: Turrilitidae (A family of ammonites, known for their coiled and smooth spiral shells)
  • Superfamily: Ammonoidea
  • Order: Ammonitida (Part of the Cephalopoda class, related to modern squid and octopus)

Morphology Features

The Subastiera sulcosa ammonite features a distinct spiral shell with smooth coiling and clear suture lines. The smooth surface of the shell, combined with the large, coiled shape, gives this ammonite its characteristic appearance. The ribbing on the shell is subtle but adds texture to the otherwise smooth spiral. The suture lines inside the shell reveal details of its internal structure, giving insight into the buoyancy control that allowed this ammonite to thrive in the marine environment.

Notable Features

This ammonite is notable for its exceptional preservation and its unique spiral shape. The Subastiera sulcosa species is not commonly found in the fossil record, making it a rare find. Its well-preserved condition, along with its smooth curvature and clear suture lines, make it a standout example of Lower Hauterivian ammonites. The marine adaptation of this species is reflected in the shape of its shell, which would have enabled it to navigate the shallow seas of the Cretaceous period.

Size and Presentation

  • Scale Cube: 1cm
  • Full sizing is provided in the photos, so you can see the exact size of the ammonite.
  • Actual Fossil: The fossil pictured is the exact piece you will receive.

Key Selling Points

  • 100% Genuine Fossil
  • Comes with a Certificate of Authenticity
  • A rare Subastiera sulcosa ammonite from the Lower Hauterivian, Cretaceous period
  • Distinct spiral shape, smooth coiling, and suture lines
  • Perfect for collectors and those interested in Cretaceous ammonites and marine fossils

This Rare Subastiera sulcosa Fossil Ammonite from Madagascar offers a rare glimpse into the Lower Hauterivian stage of the Cretaceous period. Its fine preservation, smooth spiral shape, and clear suture lines make it a valuable addition to any fossil collection, particularly for those with an interest in Cretaceous ammonites and marine life.

Additional information

Era

Cretaceous
Origin

Madagascar

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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