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RARE Quenstedtoceras pseudolamberti Fossil Ammonite – Jurassic Upper Callovian, Ryazan Russia – Genuine + COA
£24.00
Discover a rare and scientifically significant ammonite from the Jurassic seas: this exceptional Quenstedtoceras pseudolamberti Fossil Ammonite originates from the Upper Callovian Stage of the Jurassic Period, collected in Ryazan, Russia. Carefully selected for its preservation and rarity, this authentic specimen offers a glimpse into the complex ammonoid evolution of the Middle-Late Jurassic transition.
Fossil Type & Species:
- Type: Ammonite (extinct marine cephalopod)
- Species: Quenstedtoceras pseudolamberti
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Cardioceratidae
Geological Context:
- Period: Jurassic
- Epoch/Stage: Middle to Late Jurassic boundary, specifically Upper Callovian
- Biozone: Likely within the Quenstedtoceras lamberti Zone, closely associated with this species
- Depositional Environment: Offshore marine shelf, within fine calcareous sediments – ideal for cephalopod fossilisation
Locality:
- Region: Ryazan Oblast, western Russia
- Formation: Likely Callovian marine clays and marls typical of the Russian Platform (specific lithostratigraphy unverified)
Morphology & Features:
- Strongly ribbed evolute shell with well-defined bifurcating ribs
- Wide umbilicus and compressed whorl section
- Distinctive suture lines and ornamentation characteristic of Quenstedtoceras pseudolamberti
- Rare transitional form bridging earlier Macrocephalitidae-like lineages and later Cardioceratidae
Scientific Notes:
- First described by Russian paleontologist Gerassimov in the mid-20th century, Q. pseudolamberti is used in biostratigraphy to define specific subzones of the Upper Callovian
- Notable for its role in correlating European and Russian Jurassic stratigraphic sequences
Notable Details:
- Fossil is in excellent condition and displays key taxonomic features
- This is a carefully selected, professionally prepared piece – ideal for collectors, educational display, or research
- Scale Cube/Squares: Each square or cube in the photo = 1cm. Please refer to the image for exact dimensions of the specimen
Authenticity: All our fossils are 100% genuine specimens and come with a Certificate of Authenticity. You will receive the exact fossil shown in the photograph.
Add this rare and scientifically valuable fossil to your collection today – a perfect blend of palaeontology, geology, and natural history.
(Actual as seen)
Only 1 left in stock
Description
Discover a rare and scientifically significant ammonite from the Jurassic seas: this exceptional Quenstedtoceras pseudolamberti Fossil Ammonite originates from the Upper Callovian Stage of the Jurassic Period, collected in Ryazan, Russia. Carefully selected for its preservation and rarity, this authentic specimen offers a glimpse into the complex ammonoid evolution of the Middle-Late Jurassic transition.
Fossil Type & Species:
- Type: Ammonite (extinct marine cephalopod)
- Species: Quenstedtoceras pseudolamberti
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Cardioceratidae
Geological Context:
- Period: Jurassic
- Epoch/Stage: Middle to Late Jurassic boundary, specifically Upper Callovian
- Biozone: Likely within the Quenstedtoceras lamberti Zone, closely associated with this species
- Depositional Environment: Offshore marine shelf, within fine calcareous sediments – ideal for cephalopod fossilisation
Locality:
- Region: Ryazan Oblast, western Russia
- Formation: Likely Callovian marine clays and marls typical of the Russian Platform (specific lithostratigraphy unverified)
Morphology & Features:
- Strongly ribbed evolute shell with well-defined bifurcating ribs
- Wide umbilicus and compressed whorl section
- Distinctive suture lines and ornamentation characteristic of Quenstedtoceras pseudolamberti
- Rare transitional form bridging earlier Macrocephalitidae-like lineages and later Cardioceratidae
Scientific Notes:
- First described by Russian paleontologist Gerassimov in the mid-20th century, Q. pseudolamberti is used in biostratigraphy to define specific subzones of the Upper Callovian
- Notable for its role in correlating European and Russian Jurassic stratigraphic sequences
Notable Details:
- Fossil is in excellent condition and displays key taxonomic features
- This is a carefully selected, professionally prepared piece – ideal for collectors, educational display, or research
- Scale Cube/Squares: Each square or cube in the photo = 1cm. Please refer to the image for exact dimensions of the specimen
Authenticity: All our fossils are 100% genuine specimens and come with a Certificate of Authenticity. You will receive the exact fossil shown in the photograph.
Add this rare and scientifically valuable fossil to your collection today – a perfect blend of palaeontology, geology, and natural history.
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