Click on images to enlarge, found in Benton county, Arkansas, Boone limestone formation
This specimen was found in chert. It measures 2 cm, about 5/8". It appears to have a short stalk. The chert preserved its features to an amazing degree.
This specimen was found in chert. It measures 2 cm, about 5/8". It appears to have a short stalk. The chert preserved its features to an amazing degree.
Those little ridges, which connected the structure of the (bryozoan? no, CRINOID!) to the cast in which it was found, are perhaps 1/10 mm thick.
More pics in the article! Update: Visitor Barry has sent me photos strongly suggesting that this is a crinoid head, quite similar to some specimens which he had found. A crinoid head! Hoo-yah!
More pics in the article! Update: Visitor Barry has sent me photos strongly suggesting that this is a crinoid head, quite similar to some specimens which he had found. A crinoid head! Hoo-yah!
Here's a picture of the critter next to its cast.
Overall view of the cast
Magnified view of the cast.
So what is it? Please use the comment form to tell me. Thanks again Barry for identifying this "bryozoan" as actually a crinoid head!
So what is it? Please use the comment form to tell me. Thanks again Barry for identifying this "bryozoan" as actually a crinoid head!
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