Description
Presenting a RARE specimen of Metasigaloceras rusticum, a beautifully preserved ammonite fossil from the Lower Turonian stage of the Late Cretaceous period, found in the renowned fossil-rich region of Soria-Burgos, Spain.
Metasigaloceras is a distinctive genus of ammonite within the Acanthoceratidae family, often characterised by its robust shell, moderately involute whorls, and tuberculate ornamentation. The species rusticum in particular displays coarse ribbing and knobby nodes along the flanks—features that provided hydrodynamic advantages in the open marine environment of the Cretaceous seas.
You will receive the exact specimen pictured, with a scale cube showing 1cm squares to provide precise size reference. As always, all of our fossils are 100% genuine specimens and come with a Certificate of Authenticity.
Geological & Scientific Information:
- Species: Metasigaloceras rusticum
- Type: Fossil Ammonite (extinct marine cephalopod mollusc)
- Geological Period: Cretaceous
- Stage: Lower Turonian (approx. 93.9 – 89.8 million years ago)
- Location Found: Soria-Burgos region, Spain
- Order: Ammonitida
- Superfamily: Acanthoceratoidea
- Family: Acanthoceratidae
- Morphological Features: Robust, thick shell; moderate involution; prominent ribs and tubercles; compressed whorl cross-section; well-defined ventrolateral nodes
- Depositional Environment: Shallow to moderately deep marine shelf environment within the Iberian Basin, characterised by marl and limestone sedimentation in a warm Cretaceous sea
- Biozone: Associated with the Mammites nodosoides Zone of the lower Turonian, aiding in global biostratigraphic correlation
- Scientific Significance: Fossils of Metasigaloceras provide important clues about the evolutionary radiation of acanthoceratid ammonites following the Cenomanian-Turonian extinction event
Additional Notes:
This specimen is a superb collector’s item due to its bold ornamentation and the rarity of well-preserved Metasigaloceras from this locality. It is suitable for educational, research, or display purposes.
Why Buy From Us?
- 100% authentic fossils with expert verification
- Includes a Certificate of Authenticity
- You receive the exact fossil shown in the photos
- Excellent for collectors, educators, and natural history lovers
Don’t miss the chance to own this rare and striking Metasigaloceras rusticum ammonite fossil from Spain—a genuine relic of the Cretaceous seas.
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