Heliophyllum infundibulum Horn Coral with Aulocystis

A fine Middle Devonian fossil specimen of a Heliophyllum infundibulum horn coral hosting another coral colony of Aulocystis transitorius. I found this coral in the Beechwood Member, North Vernon Limestone, Givetian Stage of Clark County, Indiana, USA and my cousin Kenny cleaned it with air abrasion. It looks so much different when I spotted it. One could tell it was a horn coral and had another coral colony but WOW he really uncovered a nice size colony on this specimen.

Thanks to Kenny for the pictures.

Echinosphaerites aurantium Cystoid

These images show some interesting fossils found on the island of Öland off the Swedish coast (Suède). Fossils are Ordovician Period cystoids in the matrix from about 465 million years ago. They are identified as Echinosphaerites aurantium. The interesting thing about them is some are yellow fluorescent under longwave UV light.  See picture below.

UPDATE: Christian P. told me in an e-mail,  in Sweden these fossils are called "the Linné's apples".  Named after the Swedish botanist Carl Nilsson Linnæus. Learn more at wikipedia.

Thanks to Dave for the fossils and Christian for finding them in Sweden!

Pyrite Encrusted Caryocrinites Cystoid

 This fossil appears to be a Caryocrinites persculptis? cystoid encrusted with pyrite crystals. It was found in the Waldron Shale of Clark County, Indiana. Fossil dates to the Middle Silurian Period.  Thanks to Kenny for the images!

See more specimens at this web site.