RARE Parabolina spinulosa Trilobite Double Fossil – Upper Cambrian – Wales – Certified Authentic

Description

RARE Parabolina spinulosa Fossil Trilobite DOUBLE – Upper Cambrian, Foel Gron, Meirionnydd, Wales

This exquisite fossil features a double specimen of Parabolina spinulosa – a rare and scientifically significant trilobite from the Upper Cambrian Period, specifically from the P. spinulosa Zone of the Dolgella Series, found at Foel Gron, Meirionnydd, North Wales.

This double fossil showcases two individuals preserved in close association, offering exceptional insight into trilobite morphology and potential group behaviour in deep marine settings.

Fossil Overview:

• Species: Parabolina spinulosa
• Type: Double Trilobite Fossil (mould and impression)
• Geological Age: Upper Cambrian (approx. 497–485 million years ago)
• Stratigraphy: Dolgella Series – P. spinulosa Zone
• Location: Foel Gron, Meirionnydd, Wales, UK
• Depositional Environment: Deep marine shelf; oxygen-poor black shale environment, typical of the Welsh Basin during the late Cambrian
• Lithology: Fine-grained black mudstones and shales, with exceptional fossil preservation

Morphology & Features:

Parabolina spinulosa is a member of the Olenidae family, adapted to low-oxygen environments. Key features include:

• Flattened, elongate body
• Long glabella and reduced (or absent) eyes – characteristic of deep-water trilobites
• Fine axial segmentation and prominent thoracic ridges
• Spiny pygidium and thoracic tips (hence “spinulosa”)
• Streamlined, hydrodynamic body structure

This specimen is particularly valuable as it displays two distinct individuals in association – a rare occurrence that may represent a moulting pair or natural aggregation.

Biozone & Taxonomy:

• Biozone: Parabolina spinulosa Zone – a critical Upper Cambrian index fossil zone
• Order: Ptychopariida
• Superfamily: Ellipsocephaloidea
• Family: Olenidae
• Genus: Parabolina
• Species: spinulosa
• Described By: J.W. Salter, 1866

These trilobites are used extensively for biostratigraphy in British and Scandinavian Cambrian sequences and are indicators of global Cambrian marine anoxic events.

Notable Points:

• Rare double fossil specimen
• Excellent preservation from a classic British fossil locality
• Deep marine origin – formed in dark, anoxic muds of the Welsh Basin
• Ideal for collectors, educators, and palaeontology enthusiasts
• Comes with full Certificate of Authenticity

Specimen Information:

• Condition: Excellent preservation, clear segmentation and features
• Size Reference: 1cm cube visible in image
• What You See Is What You Get: The exact fossil pictured is the one you will receive
• Authenticity Guaranteed: Backed by certificate and ethical sourcing

Summary:

A premium-quality Parabolina spinulosa double trilobite fossil from a historic Welsh site. With outstanding preservation and scientific relevance, this specimen offers a unique opportunity to own a piece of early Palaeozoic history – ideal for display or collection.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Scale Rule Squares / Cube = 1cm. Please refer to the photo for full sizing. The fossil shown is the exact piece you will receive.