#Holectypus echinoid fossil

[uk-fossils]

HOLECTYPUS DEPRESSUS Fossil Echinoid Sea Urchin Jurassic Cornbrash Somerset UK Authentic Specimen

This listing features a well-preserved fossil echinoid (sea urchin) of the species Holectypus depressus, collected from the Cornbrash Formation in Somerset, United Kingdom. This authentic Jurassic marine invertebrate fossil is provided with a Certificate of Authenticity, and the photo shows the exact specimen you will receive.

Holectypus depressus belongs to:

Order: Holectypoida

Family: Holectypidae

This echinoid lived during the Bathonian Stage of the Middle Jurassic Period, approximately 168–166 million years ago. The Cornbrash Formation consists of marine shelly limestones and mudstones deposited in a shallow marine, inner shelf environment that supported a diverse array of invertebrate life.

Morphological Features:

Flattened, oval test (shell) with a low dome profile

Petaloid ambulacra with finely impressed pore pairs

Oral surface flattened with distinct peristome

Smooth to lightly granulated surface, often symmetrical

These features suggest an infaunal or semi-infaunal lifestyle, with the organism likely burrowing or living on soft marine sediments.

Specimen Details:

Species: Holectypus depressus

Fossil Type: Echinoid (Sea Urchin) Test

Geological Unit: Cornbrash Formation

Geological Age: Middle Jurassic (Bathonian Stage)

Location: Somerset, United Kingdom

Depositional Environment: Shallow marine shelf, calcareous muds and shelly limestones

Family: Holectypidae

This is a fine example of a Jurassic echinoid fossil from a historically significant geological unit in the UK, ideal for fossil collectors, educators, or anyone with a passion for ancient marine life.

Scale rule squares/cube = 1cm. Please see the photograph for full sizing and condition.

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