#real fossil echinoid

[uk-fossils]

Pseudodiadema depressum Regular Echinoid Fossil, Oxfordian Stage, Jurassic France | Authentic Specimen + COA

Pseudodiadema depressum Regular Echinoid Fossil – Oxfordian Stage, Late Jurassic, Cricqueboeuf, Normandy, France

This fine fossil specimen represents Pseudodiadema depressum, a regular echinoid (sea urchin) from the Oxfordian stage of the Late Jurassic, approximately 159 to 154 million years ago. It was recovered from the fossil-rich marine limestone beds of Cricqueboeuf, a renowned site in Normandy, northern France.

Fossil Type & Species:

Type: Invertebrate Fossil (Regular Echinoid / Sea Urchin)

Species: Pseudodiadema depressum

Phylum: Echinodermata

Class: Echinoidea

Order: Cidaroida

Superfamily: Pseudodiadematoidea

Family: Pseudodiadematidae

Described by: Cotteau, 1863

Geological & Stratigraphic Details:

Location: Cricqueboeuf, Calvados, Normandy, France

Formation: Oxfordian marine limestones

Geological Stage: Oxfordian (Upper Jurassic)

Age: ~159–154 million years ago

Biozone: Perisphinctes ammonite zone (regional correlation)

Depositional Environment: Shallow marine carbonate platform with calm, warm seas; ideal for the preservation of delicate echinoid shells in fine-grained limestones

Morphology & Features: This Pseudodiadema depressum specimen features:

Sub-hemispherical, symmetrical test with clear ambital outline

Densely arranged primary and secondary tubercles forming a detailed lattice across the shell

Well-developed ambulacral and interambulacral zones, sometimes showing fine pore structures

No spines attached, but tubercle structure suggests strong spine-bearing capability

Subtle colour variations from beige to pale brown, depending on matrix contact

Notable: Pseudodiadema depressum is a classic species of Jurassic echinoid used in palaeoenvironmental and biostratigraphic studies. Its compact test and distinctive tubercle patterning make it both scientifically important and visually appealing.

Specimen Details:

Origin: Cricqueboeuf, Normandy, France

Species: Pseudodiadema depressum

Fossil Type: Echinoid Shell (Regular Sea Urchin)

Geological Stage: Oxfordian, Late Jurassic

Size Reference: Scale rule square = 1cm (please refer to the listing photo for full size)

Note: You will receive the exact specimen shown in the photographs

Authenticity & Quality: All our fossils are genuine and professionally selected. This specimen includes a Certificate of Authenticity. No restorations or artificial enhancements are applied.

Why Choose This Fossil? Perfect for:

Fossil and echinoderm collectors

Academic and educational purposes

Natural history displays

Unique gifts with palaeontological value

Shipping & Packaging: Eco-conscious packaging and tracked global shipping ensure secure and swift delivery. Each fossil is packed with care to preserve detail and structure.

Own a finely preserved sea urchin from the Jurassic oceans of France with this authentic Pseudodiadema depressum echinoid fossil.

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

[echinoid-fossils-on-the-rocks]

On the fossil hunting now this afternoon, i need to do a little stress out from work anyway.

Thinking about it all time anyway, also I need new to shown for this fossil Friday.

Real time outdoor Edit :

Uuuh have some part of an bruised brachiopod cluster in rock matrix found. Like Limestone?

And an Incredible 🍊 size echinoid, in near perfectly condition!!!!!!!!

[uk-fossils]

Circopeltis baicheri Regular Echinoid Fossil, Ypresian Stage, Eocene France | Authentic Specimen + COA

CIRCOpeltis baicheri Regular Echinoid Fossil – Ypresian Stage, Early Eocene, Antugnac, France

This well-preserved fossil specimen is a rare Circopeltis baicheri, a regular echinoid (sea urchin) that lived during the Ypresian stage of the Early Eocene, approximately 56 to 47.8 million years ago. Found in the renowned marine fossil beds of Antugnac, southern France, this specimen exemplifies the morphological diversity and beauty of post-Paleocene echinoids.

Fossil Type & Species:

Type: Invertebrate Fossil (Regular Echinoid/Sea Urchin)

Species: Circopeltis baicheri

Phylum: Echinodermata

Class: Echinoidea

Order: Cidaroida (tentative placement)

Family: Cidaridae or related regular echinoid lineage

Described by: (Exact authority not formally cited; likely post-WWII paleontological records in European literature)

Geological & Stratigraphic Details:

Location: Antugnac, Aude, Occitanie, France

Formation: Ypresian marine marl and limestone beds

Geological Stage: Ypresian (Early Eocene)

Age: ~56–47.8 million years ago

Depositional Environment: Warm, shallow marine environment with carbonate-rich mud and fine sediment ideal for the preservation of echinoids

Biozone: Not specifically assigned; part of the broader Eocene echinoid-bearing beds of southern France

Morphology & Features: This Circopeltis baicheri specimen is noted for:

Symmetrical, globular to slightly flattened test (sea urchin shell)

Five distinct ambulacral zones with regularly spaced tubercles

No visible spines attached, though tubercle positions are preserved

Test diameter and surface ornamentation consistent with regular echinoid structure

Preserved in light beige to grey tones, sometimes with original sediment matrix attached

Notable: Circopeltis is a lesser-known but scientifically relevant genus of regular echinoids from the Eocene of France. Specimens like baicheri are rarely seen outside academic collections. Their presence helps define biodiversity recovery and reef evolution in the early Paleogene after the K-Pg mass extinction.

Specimen Details:

Origin: Antugnac, France

Species: Circopeltis baicheri

Fossil Type: Echinoid Shell (Regular Sea Urchin)

Geological Stage: Ypresian, Early Eocene

Size Reference: Scale rule square = 1cm (see photo for exact size)

Note: You will receive the exact specimen shown in the photograph

Authenticity & Quality: This fossil is professionally verified and 100% genuine. It comes with a Certificate of Authenticity. No restoration, casting, or enhancement has been applied.

Why Choose This Fossil? Ideal for:

Fossil collectors and echinoderm enthusiasts

Educational and teaching displays

Early Paleogene marine life studies

Decorative fossil art with scientific value

Shipping & Packaging: Fast, tracked shipping with secure, eco-conscious packaging. Each fossil is handled with expert care to ensure safe delivery.

Add a scientifically significant and visually elegant Circopeltis baicheri echinoid fossil to your collection from the beautiful marine beds of Antugnac, France.

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

[uk-fossils]

Acrosalenia hemicidaroides Echinoid Fossil + Spines, Bajocian Stage, Jurassic France | Rare Authentic Specimen + COA

Acrosalenia hemicidaroides Echinoid Fossil with Spines – Bajocian Stage, Middle Jurassic, Neufchâteau, France

This exceptionally rare fossil specimen features a beautifully preserved Acrosalenia hemicidaroides echinoid, complete with fossilised spines, from the Bajocian stage of the Middle Jurassic, approximately 170 to 168 million years ago. It was discovered in the renowned marine fossil deposits of Neufchâteau, northeastern France.

Fossil Type & Species:

Type: Invertebrate Fossil (Echinoid/Sea Urchin + Detached Spines)

Species: Acrosalenia hemicidaroides

Phylum: Echinodermata

Class: Echinoidea

Order: Cidaroida

Family: Hemicidaridae

Described by: d'Orbigny, 1850 (species known since the mid-19th century)

Geological & Stratigraphic Details:

Location: Neufchâteau, Vosges, France

Formation: Bajocian marine limestone/marl layers

Geological Stage: Bajocian, Middle Jurassic

Age: ~170–168 million years ago

Depositional Environment: Shallow marine carbonate platform, ideal for echinoderm preservation due to low-energy sedimentation and early calcite mineralisation

Biozone: Bajocian ammonite biozones (exact echinoid zonation not formally assigned)

Morphology & Features: This fossil displays key traits of Acrosalenia hemicidaroides:

Spherical to sub-hemispherical test (shell) with intricate tubercle patterns

Thick, robust primary spines, often found detached and fossilised alongside the test

Ambulacral plating in orderly radial arrangement with fine granulation

Distinct oral and aboral surfaces, sometimes visible in partially exposed or prepared examples

Colour ranges from pale grey to light brown due to local matrix mineralisation

Notable: This species is a classic example of Jurassic cidaroid echinoids and is rarely found with spines preserved in association. The presence of spines makes this a scientifically significant and highly aesthetic specimen, ideal for both collectors and educators.

Specimen Details:

Origin: Neufchâteau, France

Species: Acrosalenia hemicidaroides

Fossil Type: Echinoid (Sea Urchin) Test and Spines

Geological Stage: Bajocian, Middle Jurassic

Size Reference: Scale rule square = 1cm (see listing photos for accurate sizing)

Note: The specimen pictured is the exact item you will receive

Authenticity & Quality: All our fossils are guaranteed genuine and carefully selected. This piece includes a Certificate of Authenticity and has not been restored or enhanced.

Why Choose This Fossil? An ideal specimen for:

Serious fossil collectors and echinoderm enthusiasts

Museum or university-level palaeontology displays

Decorative fossil showcases

Education in marine palaeobiology and Jurassic ecosystems

Shipping & Packaging: All items are professionally packed with eco-conscious materials and shipped via tracked services for safe delivery.

Add a stunning piece of Jurassic marine life to your collection with this rare Acrosalenia hemicidaroides echinoid fossil complete with spines from Neufchâteau, France.

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

[uk-fossils]

Small Echinoid Fossil - Salenia prestensis - Cretaceous, Aptian, Morella Spain - Genuine Specimen with Certificate

This listing features a beautifully preserved small echinoid fossil of the species Salenia prestensis, sourced from the Aptian stage of the Cretaceous period in the Morella region, Castellón province, Spain. This genuine fossil showcases the characteristic features of this extinct sea urchin, offering both scientific value and aesthetic charm.

Salenia prestensis belonged to a genus of regular echinoids that lived during the Lower Cretaceous. These marine echinoderms are recognized by their spherical to slightly flattened tests, covered with tiny tubercles and spines in life. Fossils of this genus are relatively rare and sought after, particularly from the rich sedimentary beds of the Iberian Peninsula.

The exact fossil shown in the photographs is what you will receive, accompanied by a 1cm scale cube for sizing reference.

Geological & Fossil Context:

Species: Salenia prestensis (Regular Echinoid)

Type: Fossilised sea urchin (echinoderm)

Formation: Cretaceous marine limestone

Location: Morella, Castellón Province, Spain

Age: Aptian Stage, Lower Cretaceous (~125–113 million years ago)

Fossil Features:

Preservation: Excellent preservation of surface texture and overall form

Preparation: Carefully cleaned to reveal natural detail

Condition: 100% genuine and stable, suitable for display or study

Product Highlights:

Genuine Salenia prestensis echinoid fossil

Sourced from a classic Cretaceous locality in Spain

Includes a Certificate of Authenticity

An ideal piece for collectors, educators, or natural history enthusiasts

The Aptian marine deposits near Morella are well-known for producing high-quality fossils, and this echinoid is a perfect example of the biodiversity that flourished in Cretaceous seas. With its detailed morphology and historical significance, this fossil is both a decorative and educational treasure.

Please review all photos for size and detail. The item shown is the exact specimen you will receive.

Own a rare and exquisite Salenia prestensis echinoid fossil from Spain’s ancient seas.

[echinoid-fossils-on-the-rocks]

The collection of finds is growing

These are the other pictures taken from the today finds of nearby common fossils in chert, flint from myself.

It was an good trip for the local search on nice weather with these finds. Nice echinoid in full completed size of an chestnut and the new shard with an tiny mussel.

The next fossil hunts will be to the previous areas from the other referring posts. There must more of them to digging out or find to picking up.

One of the real big pieles of stones is already gone, within all of the potencial fossils. 🥺

Repost from 04.04.2024