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Rare Parabolina heres Trilobite Fossil – Upper Cambrian, Cwmhesgyn Mudstone, Bryn-llan-fawr, Trawsfynydd, Wales
Rare Parabolina heres Trilobite Fossil – Upper Cambrian, Cwmhesgyn Mudstone, Bryn-llan-fawr, Trawsfynydd, Wales - Image 2

Rare Parabolina heres Trilobite Fossil – Upper Cambrian, Cwmhesgyn Mudstone, Bryn-llan-fawr, Trawsfynydd, Wales

Original price was: £84.00.Current price is: £75.60.

RARE Parabolina heres Fossil Trilobite

Upper Cambrian, Cwmhesgyn Mudstone

Bryn-llan-fawr near Trawsfynydd, Wales, UK

This is an authentic and rare fossil of the trilobite Parabolina heres, a member of the Olenidae family, found in the Upper Cambrian-aged Cwmhesgyn Mudstone Formation. This formation is exposed near Bryn-llan-fawr, close to Trawsfynydd in North Wales, an area long known for important Cambrian fossil discoveries.

Geological & Palaeontological Details:

  • Species: Parabolina heres
  • Fossil Type: Complete or partial trilobite fossil
  • Location: Bryn-llan-fawr, near Trawsfynydd, North Wales, UK
  • Formation: Cwmhesgyn Mudstone
  • Geological Stage: Upper Cambrian (Furongian Series)
  • Depositional Environment: Deep marine basin – low-oxygen muddy seafloor, ideal for trilobite preservation
  • Biozone: Parabolina heres Zone
  • Family: Olenidae
  • Superfamily: Olenoidea
  • Order: Ptychopariida
  • Formally Described By: First described by Lake in 1906

Morphology Features:

  • Broad cephalon (head) with distinctive glabella
  • Smooth, tapering thorax with multiple segments
  • Narrow pygidium (tail)
  • Adapted to hypoxic (low-oxygen) deep-sea environments, as typical of olenid trilobites
  • Thin exoskeleton with some species preserving delicate fine details

Why This Fossil is Special:

  • Very limited fossiliferous exposures at this locality
  • This species is diagnostic of its biozone and useful in high-resolution stratigraphy
  • Rare and desirable for collectors of British Cambrian material
  • Specimens from Cwmhesgyn Mudstone are not commercially common and often restricted to academic collections

Product & Purchase Info:

  • The photo shows the exact specimen you will receive
  • Scale cube = 1cm — see images for full sizing
  • Includes a Certificate of Authenticity
  • 100% Genuine, responsibly collected specimen
  • Professionally cleaned and prepared to highlight key morphological features

Our Guarantee:

All of our Fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. This fossil has been carefully selected for its scientific interest, condition, and quality — ideal for collectors, researchers, or museum-quality displays.

Questions are always welcome — we’re happy to provide additional details or photos.

(Actual as seen)

Only 1 left in stock

SKU: UF3918 Category:

Description

RARE Parabolina heres Fossil Trilobite

Upper Cambrian, Cwmhesgyn Mudstone

Bryn-llan-fawr near Trawsfynydd, Wales, UK

This is an authentic and rare fossil of the trilobite Parabolina heres, a member of the Olenidae family, found in the Upper Cambrian-aged Cwmhesgyn Mudstone Formation. This formation is exposed near Bryn-llan-fawr, close to Trawsfynydd in North Wales, an area long known for important Cambrian fossil discoveries.

Geological & Palaeontological Details:

  • Species: Parabolina heres
  • Fossil Type: Complete or partial trilobite fossil
  • Location: Bryn-llan-fawr, near Trawsfynydd, North Wales, UK
  • Formation: Cwmhesgyn Mudstone
  • Geological Stage: Upper Cambrian (Furongian Series)
  • Depositional Environment: Deep marine basin – low-oxygen muddy seafloor, ideal for trilobite preservation
  • Biozone: Parabolina heres Zone
  • Family: Olenidae
  • Superfamily: Olenoidea
  • Order: Ptychopariida
  • Formally Described By: First described by Lake in 1906

Morphology Features:

  • Broad cephalon (head) with distinctive glabella
  • Smooth, tapering thorax with multiple segments
  • Narrow pygidium (tail)
  • Adapted to hypoxic (low-oxygen) deep-sea environments, as typical of olenid trilobites
  • Thin exoskeleton with some species preserving delicate fine details

Why This Fossil is Special:

  • Very limited fossiliferous exposures at this locality
  • This species is diagnostic of its biozone and useful in high-resolution stratigraphy
  • Rare and desirable for collectors of British Cambrian material
  • Specimens from Cwmhesgyn Mudstone are not commercially common and often restricted to academic collections

Product & Purchase Info:

  • The photo shows the exact specimen you will receive
  • Scale cube = 1cm — see images for full sizing
  • Includes a Certificate of Authenticity
  • 100% Genuine, responsibly collected specimen
  • Professionally cleaned and prepared to highlight key morphological features

Our Guarantee:

All of our Fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. This fossil has been carefully selected for its scientific interest, condition, and quality — ideal for collectors, researchers, or museum-quality displays.

Questions are always welcome — we’re happy to provide additional details or photos.

Additional information

Era

Cambrian
Origin

United Kingdom

Cambrian Information

The Cambrian Period (541–485 million years ago) was the first period of the Paleozoic Era, marking a dramatic explosion of life known as the Cambrian Explosion. During this time, complex multicellular organisms rapidly diversified, giving rise to the first arthropods, mollusks, echinoderms, and chordates—early ancestors of vertebrates. The climate was generally warm, with high sea levels covering much of the continents, creating vast shallow seas where life thrived. Iconic creatures such as Trilobites, Anomalocaris, and Opabinia dominated the oceans, while the first primitive reefs formed. The Cambrian set the stage for the evolution of modern animal groups and the complexity of marine ecosystems.

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