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Rare: fossil blastoid pentremites gudoni – carboniferous, mississippian, millstadt, illinois, usa – genuine specimen with coa
Rare: fossil blastoid pentremites gudoni – carboniferous, mississippian, millstadt, illinois, usa – genuine specimen with coa - Image 2

Rare: fossil blastoid pentremites gudoni – carboniferous, mississippian, millstadt, illinois, usa – genuine specimen with coa

Original price was: £12.00.Current price is: £9.60.

This is a rare Pentremites gudoni blastoid fossil from the Point Creek Formation, Carboniferous (Mississippian stage), discovered in Millstadt, Illinois, USA. Blastoids, often referred to as “sea buds,” are an extinct class of echinoderms closely related to crinoids. They thrived in ancient shallow marine environments, filtering food particles from the water using delicate brachioles.

This well-preserved specimen showcases the classic star-shaped ambulacra and calyx structure characteristic of blastoids. Fossils from the Carboniferous period provide valuable insights into early marine ecosystems, making this an excellent addition for collectors and researchers alike.

Key Features:

  • Authentic Pentremites gudoni blastoid fossil
  • Age: Approximately 330-345 million years old (Carboniferous, Mississippian stage)
  • Origin: Point Creek Formation, Millstadt, Illinois, USA
  • Fine preservation with clear ambulacral and calyx details
  • From the Alice Purnell Collection, one of the largest ammonite and fossil collections in the world
  • 100 percent genuine specimen with Certificate of Authenticity

Scale Rule Squares = 1cm – Please see photos for accurate sizing.

All of our fossils are guaranteed genuine and securely packaged for worldwide shipping.

(Actual as seen)

Only 1 left in stock

SKU: AF0483 Category:

Description

This is a rare Pentremites gudoni blastoid fossil from the Point Creek Formation, Carboniferous (Mississippian stage), discovered in Millstadt, Illinois, USA. Blastoids, often referred to as “sea buds,” are an extinct class of echinoderms closely related to crinoids. They thrived in ancient shallow marine environments, filtering food particles from the water using delicate brachioles.

This well-preserved specimen showcases the classic star-shaped ambulacra and calyx structure characteristic of blastoids. Fossils from the Carboniferous period provide valuable insights into early marine ecosystems, making this an excellent addition for collectors and researchers alike.

Key Features:

  • Authentic Pentremites gudoni blastoid fossil
  • Age: Approximately 330-345 million years old (Carboniferous, Mississippian stage)
  • Origin: Point Creek Formation, Millstadt, Illinois, USA
  • Fine preservation with clear ambulacral and calyx details
  • From the Alice Purnell Collection, one of the largest ammonite and fossil collections in the world
  • 100 percent genuine specimen with Certificate of Authenticity

Scale Rule Squares = 1cm – Please see photos for accurate sizing.

All of our fossils are guaranteed genuine and securely packaged for worldwide shipping.

Additional information

Weight 0.1 g
Dimensions 10 × 10 × 10 cm
Era

Carboniferous
Origin

USA

Carboniferous Information

The Carboniferous Period (359–299 million years ago) was a time of vast forests, giant insects, and the first reptiles. Named for its extensive coal deposits, this period saw lush swamps filled with towering lycophyte trees, ferns, and horsetails, which would later become today’s coal reserves. The climate was warm and humid, with high oxygen levels fueling the growth of giant arthropods like the dragonfly-like Meganeura and the massive millipede Arthropleura. Amphibians thrived in swampy environments, while the first reptiles evolved, laying eggs on land. In the oceans, sharks and early bony fish dominated, and corals flourished in warm, shallow seas. The period ended with a cooling climate and glaciation, leading to the drying of swamps and the decline of many species.

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