Description
This listing is for a Rare Fossil Ammonite (Subdichotomoceras rebilliyi) from the Lower Tithonian Stage of the Late Jurassic to Early Cretaceous transition, discovered at Tulear, Madagascar.
100% Genuine Fossil Specimen – All of our fossils are authentic and come with a Certificate of Authenticity.
Exact Specimen Shown – The photos provided are of the actual fossil you will receive.
Scale for Reference – Scale rule squares/cube = 1cm. Please see photos for full sizing.
Geological & Scientific Details:
- Fossil Type: Ammonite (extinct marine mollusc, related to squid and octopus).
- Species: Subdichotomoceras rebilliyi.
- Order: Ammonitida.
- Superfamily: Perisphinctoidea.
- Family: Perisphinctidae.
- Geological Period: Late Jurassic.
- Stage/Age: Lower Tithonian (approx. 152 – 148 million years ago).
- Locality: Tulear, Madagascar.
Notable Features & Morphology:
- Shell Form: Evolute with exposed inner whorls.
- Ribs: Prominent, bifurcating ribs running across the flanks, a characteristic of Subdichotomoceras.
- Whorl Section: Broad with strong ribbing, producing an eye-catching ornamental shell.
- Size: A well-preserved rare specimen, highly sought after by collectors.
Depositional Environment:
During the Tithonian, the Tulear region of Madagascar was covered by shallow, warm tropical seas with carbonate-rich sediments. These conditions provided ideal preservation for ammonites, resulting in abundant yet scientifically significant fossil material.
Scientific & Collecting Importance:
Subdichotomoceras rebilliyi is an important ammonite species for biostratigraphic correlation within the Tithonian. Its robust ribbing and distinct shell morphology make it a highly recognisable index fossil and a prized specimen in fossil collections.
Why Buy This Fossil?
- A rare ammonite species from Tulear, Madagascar.
- Excellent preservation with characteristic ribbing.
- An important specimen for collectors of Jurassic–Cretaceous ammonites or Madagascan fossil material.
- Supplied with a Certificate of Authenticity guaranteeing its provenance.
All of our fossils are responsibly sourced, carefully prepared, and chosen for quality.
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