Description
Blastoids – Extinct Echinoderms related to modern day Starfish and Sea Urchins.
Price is for ONE box. Very nice Pentremites Pyriformis Blastoid from Sulphur, Indiana.
Blastoids are Echinoderms. They are related to modern day starfish, but this Pentremites Pyriformis Blastoid and all others are now extinct. Blastoids attached to the bottom of the ocean by means of a holdfast. But these were not roots as the creature was an animal. It was a filter feeder using it’s arms to filter food from the water and because it was a filter feeder it needed to live in an area that had a free flowing current and plankton to eat. So these animals were part of the oceanic ecosystem.
These fossils are distributed widely in the United States but sometimes are very difficult to find.
This Pentremites Pyriformis Blastoid is found but is much more rare than the godoni species.
Mississippian Period
Salem Formation
Sulphur, Indiana
Because this Pentremites Pyriformis Blastoid fossil are brittle and tend to get damaged easily these specimens come in this handsome 4 1/2 inch by 5 1/2 inch glass topped collectors box.
Very nice LARGE Blastoid from Sulphur, Indiana.
PENTREMITES pyriformis
Mississippian Period
Salem Formation
Sulphur, Indiana
The Blastoids are an extinct echinoderm, related to modern day starfish. But were most common in the Mississippian Period. They are actually an animal attached to the bottom of the ocean by a stalk and holdfast. The had radiating arms which captured the food and brought it to the mouth. They were filter feeders and were quite common..
Specimen is just over 1 inch long and comes in this handsome 4 1/2 inch by 5 1/2 inch leatherette glass topped collectors box.
