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Rare Torquatisphinctes madagascariensis Fossil Ammonite – Lower Kimmeridgian, Upper Jurassic, Madagascar – Genuine + COA

£24.00

A rare Torquatisphinctes madagascariensis Fossil Ammonite, from the Lower Kimmeridgian Stage of the Upper Jurassic, collected in Madagascar. This ammonite is an excellent representative of the genus Torquatisphinctes, recognised for its elegant ribbing, strong coiling, and significance within Kimmeridgian ammonite faunas. The specimen shown in the photographs is the exact one you will receive, and it is supplied with a Certificate of Authenticity.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Species: Torquatisphinctes madagascariensis
  • Order: Ammonitida
  • Superfamily: Perisphinctoidea
  • Family: Perisphinctidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Upper Jurassic – Lower Kimmeridgian (approx. 157.3 to 155 million years ago)
  • Biozone: Typically associated with Platynota Zone faunas, used for global correlation of the early Kimmeridgian
  • Formation: Kimmeridgian marine limestones of Madagascar
  • Depositional Environment: Marine carbonate shelf environment with fine-grained limestones and marls, producing excellent ammonite preservation

Locality:

  • Region: Madagascar

Morphology & Features:

  • Evolute shell with wide umbilicus
  • Strong, dense ribbing that bifurcates on the flanks and extends across the venter
  • Whorl section moderately compressed with graceful coiling
  • Distinctive ribbing pattern characteristic of Torquatisphinctes madagascariensis

Scientific Notes:

  • The genus Torquatisphinctes is an important group within the Perisphinctidae, first recognised in the 19th century
  • T. madagascariensis is a significant species in Madagascan ammonite faunas, aiding in regional and global biostratigraphic correlation

Notable Details:

  • Excellent preservation with strong ribbing and detailed shell ornamentation
  • Rare Madagascan ammonite from a classic Kimmeridgian deposit
  • 100% genuine, natural fossil – no restoration
  • Scale Reference: Each square or cube in the photo = 1cm. Please check the images for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. Every purchase includes a Certificate of Authenticity. The fossil shown is the exact specimen you will receive.

 

This Torquatisphinctes madagascariensis ammonite is a rare and scientifically valuable fossil from the Lower Kimmeridgian of Madagascar – an excellent addition for collectors, researchers, or natural history displays.

 

(Actual as seen)

Only 1 left in stock

SKU: UF4312 Category:

Description

A rare Torquatisphinctes madagascariensis Fossil Ammonite, from the Lower Kimmeridgian Stage of the Upper Jurassic, collected in Madagascar. This ammonite is an excellent representative of the genus Torquatisphinctes, recognised for its elegant ribbing, strong coiling, and significance within Kimmeridgian ammonite faunas. The specimen shown in the photographs is the exact one you will receive, and it is supplied with a Certificate of Authenticity.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Species: Torquatisphinctes madagascariensis
  • Order: Ammonitida
  • Superfamily: Perisphinctoidea
  • Family: Perisphinctidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Upper Jurassic – Lower Kimmeridgian (approx. 157.3 to 155 million years ago)
  • Biozone: Typically associated with Platynota Zone faunas, used for global correlation of the early Kimmeridgian
  • Formation: Kimmeridgian marine limestones of Madagascar
  • Depositional Environment: Marine carbonate shelf environment with fine-grained limestones and marls, producing excellent ammonite preservation

Locality:

  • Region: Madagascar

Morphology & Features:

  • Evolute shell with wide umbilicus
  • Strong, dense ribbing that bifurcates on the flanks and extends across the venter
  • Whorl section moderately compressed with graceful coiling
  • Distinctive ribbing pattern characteristic of Torquatisphinctes madagascariensis

Scientific Notes:

  • The genus Torquatisphinctes is an important group within the Perisphinctidae, first recognised in the 19th century
  • T. madagascariensis is a significant species in Madagascan ammonite faunas, aiding in regional and global biostratigraphic correlation

Notable Details:

  • Excellent preservation with strong ribbing and detailed shell ornamentation
  • Rare Madagascan ammonite from a classic Kimmeridgian deposit
  • 100% genuine, natural fossil – no restoration
  • Scale Reference: Each square or cube in the photo = 1cm. Please check the images for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. Every purchase includes a Certificate of Authenticity. The fossil shown is the exact specimen you will receive.

 

This Torquatisphinctes madagascariensis ammonite is a rare and scientifically valuable fossil from the Lower Kimmeridgian of Madagascar – an excellent addition for collectors, researchers, or natural history displays.

 

Additional information

Era

Jurassic

Origin

Madagascar

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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