Fossils Found That Day
Crinoids and Other Rarities
As expected, most of the fossils found were Flexicalymene
retrorsa trilobites (ho hum). But an unusually large number of crinoid
calyxes were found. Here's one of the best finds that day. A beautiful Pycnocrinus
dyeri crinoid calyx (cup). There's a great looking, prone, Flexi
trilobite right next to it, in the shale. Those omnipresent Flexi's!
Here's an interesting find. It's a single Echinoderm plate. At
first glance, you might think it's a cystoid plate. It's more likely to be a cup
plate of the crinoid, Pycnocrinus dyeri.
Here's another beautiful calyx of Pycnocrinus dyeri.
This is a much smaller, but more complete specimen of Pycnocrinus
dyeri. Note the crinoid arms on the left of this matrix!
This interesting cup of Pycnocrinus dyeri has a
peel-away section, showing the crinoid interior.
The site is from the Arnheim formation of the Cincinnatian. A
Dry Dredger from a nice portion of a Arnheim Conularia!
Several parts of Nautiloid Cephalopods were also found.
And now, the TRILOBITES! This rock has an interesting genal
spine of an Ontopleurid trilobite. It is most likely Acidaspis.
Oh, there's a Flexi trilobite to the left that didn't get brushed off the
Shown above is a closeup of the Acidaspis.
It will be interesting when the trilobite below is cleaned. Is
it a Proetus spurlocki? (very rare!). Proetus is the
juvenile form of Decoroproetus.
Next Page: Fossil Found That Day - Isotelus and Flexicalymene
Page 1: Introduction and Collecting Photos
Page 2: More Collecting Photos
Page 3: Fossils Found That Day: Crinoids and Other Rarities
Page 4: Fossils Found That Day:: Isotelus and Flexi Trilobites
Page 5: Fossils Found That Day: More Flexicalymene
Page 6: Living Fossils Found That Day
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