Fossils for Sale - High-quality BRITISH and WORLDWIDE Fossils. An impressive selection of fossils, including Ammonites, Trilobites, Belemnites, Fossil Fish, Fossil Shark Teeth, Fossilised Insects in Amber, Dinosaurs, and Reptiles. UK Fossils was formed in 1988 and collects and preps our own fossils in the heart of the Jurassic Coast, collecting fossils from Lyme Regis, Charmouth and Somerset. Our passion for fossils is reflected in our carefully curated collection, which includes some of the rarest and most unique specimens available.
This listing features a RARE and naturally preserved fossil of Gonioclymenia speciosis, a primitive ammonoid (gonatite), from the Lower Devonian period, collected in the fossil-rich Devonian outcrops of Morocco.
You will receive the exact specimen shown in the photo, which includes a 1cm cube scale for size reference. This is a 100% genuine fossil, hand-selected for quality and preservation, and it comes with a Certificate of Authenticity.
Stage: Lower Devonian (approx. 419–393 million years ago)
Location Found: Morocco
Order: Clymeniida (or Goniatitida, depending on classification revisions)
Superfamily: Tornocerataceae
Family: Possibly Gonioclymeniidae (tentative)
Morphological Features: Gonioclymenia features a typically planispiral shell with relatively simple goniatitic suture lines. Whorls are generally compressed with a rounded to angular venter. Ornamentation may include faint ribs or growth lines.
Depositional Environment: Marine carbonate platform or basin environments typical of Early Devonian Morocco, with limestones and shales promoting good fossil preservation.
Scientific Importance: Gonioclymenia and related genera are important for understanding the early evolution of ammonoids following the Silurian–Devonian transition. These fossils are key to biostratigraphic frameworks in Devonian strata across North Africa and Europe.
Additional Notes:
As one of the earliest groups of ammonoid cephalopods, gonatites like Gonioclymenia represent a critical evolutionary phase between nautiloids and later ammonites. Their rarity and age make them highly desirable among fossil collectors and paleontology enthusiasts.
Why Buy From Us?
Every specimen is 100% genuine and professionally curated.
Each fossil comes with a Certificate of Authenticity.
The actual item in the photo is the one you will receive.
Ideal for collectors, educators, museum displays, or as a unique natural history gift.
Add this rare and ancient Gonioclymenia speciosis gonatite fossil to your collection and own a beautifully preserved relic from Earth’s early marine ecosystems!
This listing features a RARE and naturally preserved fossil of Gonioclymenia speciosis, a primitive ammonoid (gonatite), from the Lower Devonian period, collected in the fossil-rich Devonian outcrops of Morocco.
You will receive the exact specimen shown in the photo, which includes a 1cm cube scale for size reference. This is a 100% genuine fossil, hand-selected for quality and preservation, and it comes with a Certificate of Authenticity.
Stage: Lower Devonian (approx. 419–393 million years ago)
Location Found: Morocco
Order: Clymeniida (or Goniatitida, depending on classification revisions)
Superfamily: Tornocerataceae
Family: Possibly Gonioclymeniidae (tentative)
Morphological Features: Gonioclymenia features a typically planispiral shell with relatively simple goniatitic suture lines. Whorls are generally compressed with a rounded to angular venter. Ornamentation may include faint ribs or growth lines.
Depositional Environment: Marine carbonate platform or basin environments typical of Early Devonian Morocco, with limestones and shales promoting good fossil preservation.
Scientific Importance: Gonioclymenia and related genera are important for understanding the early evolution of ammonoids following the Silurian–Devonian transition. These fossils are key to biostratigraphic frameworks in Devonian strata across North Africa and Europe.
Additional Notes:
As one of the earliest groups of ammonoid cephalopods, gonatites like Gonioclymenia represent a critical evolutionary phase between nautiloids and later ammonites. Their rarity and age make them highly desirable among fossil collectors and paleontology enthusiasts.
Why Buy From Us?
Every specimen is 100% genuine and professionally curated.
Each fossil comes with a Certificate of Authenticity.
The actual item in the photo is the one you will receive.
Ideal for collectors, educators, museum displays, or as a unique natural history gift.
Add this rare and ancient Gonioclymenia speciosis gonatite fossil to your collection and own a beautifully preserved relic from Earth’s early marine ecosystems!
Additional information
Era
Devonian
Origin
Morocco
Devonian Information
The Devonian Period (419–359 million years ago), known as the "Age of Fishes," was a time of major evolutionary advances in both marine and terrestrial life. The oceans were dominated by armored placoderm fish, early sharks, and lobe-finned fish like Tiktaalik, which had features that helped vertebrates transition to land. Coral reefs flourished, and ammonites became more diverse. On land, the first forests appeared, with early trees like Archaeopteris, leading to a drop in atmospheric carbon dioxide and climate cooling. The first tetrapods (four-legged vertebrates) began evolving from fish, marking a critical step in the evolution of amphibians. The period ended with the Devonian extinction, likely caused by ocean anoxia and climate shifts, wiping out many marine species and reshaping ecosystems.
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