Description
RARE Homagnostus obesus Trilobite Fossil
Upper Cambrian – Nant Ganol, Meirionnydd, North Wales, UK
This listing is for a rare and authentic fossil of the trilobite species Homagnostus obesus, collected from the renowned Upper Cambrian strata at Nant Ganol, Meirionnydd, North Wales. Trilobites from this locality are highly sought after due to their excellent preservation and significance within the Cambrian biostratigraphic record.
Geological & Palaeontological Details:
- Fossil Type: Trilobite fossil (whole or partial, depending on preservation)
- Species: Homagnostus obesus
- Locality: Nant Ganol, Meirionnydd, Wales, UK
- Geological Age: Upper Cambrian (Furongian)
- Depositional Environment:
- Fine-grained marine mudstones and siltstones
- Low-energy offshore basin with anoxic bottom conditions aiding in exceptional fossil preservation
- Order: Agnostida
- Family: Agnostidae
- Superfamily: Agnostoidea
- Biozone Association: Homagnostus obesus is a key zonal fossil for late Cambrian biostratigraphy and may be linked to the H. obesus Zone or adjacent agnostid biozones
- Formally Described By: Typically attributed to early 20th-century taxonomic work (possibly Howell, 1935)
Morphology Features:
- Small, isopygous (head and tail shield of similar size)
- Two-segmented thorax
- Nearly smooth cephalon and pygidium
- Typical of agnostid trilobites, adapted for pelagic (open water) lifestyles
- May have functioned as planktonic or benthic detritivores
Scientific and Collectible Importance:
- Homagnostus obesus is a biostratigraphically important trilobite species, often used for correlating Upper Cambrian rocks globally
- Rare in well-preserved form, especially from classic British localities
- Excellent for collectors, researchers, and anyone interested in early arthropod evolution or the Cambrian Explosion
Product Notes:
- Photo shows the actual specimen for sale
- Scale: 1cm rule/cube shown in photos – please review image for exact size
- Includes a Certificate of Authenticity
- Professionally handled and sourced from an established fossil collection
Our Guarantee:
All of our Fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. Each fossil is carefully selected for quality and scientific interest.
Please feel free to contact us with any questions or for additional images and provenance.






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