Bryozoan on Crinoid Fossil

This fossil is a bryozoan anchored on to a crinoid column. It was found in the Glen Dean formation of Grayson County, Kentucky USA. The fossil dates to the Mississippian Period. Thanks to Kenny for the images.

Petalodus Shark Tooth Fossil

These pictures show a Petalodus (Hall, 1858) shark tooth fossil. They were found in the Glen Dean Formation of Grayson County, Kentucky USA. The fossils date to the Mississippian Period. Thanks to Kenny for the images.

Petalodis Shark Tooth Fossil

 

 

The pictures shown in this post are of a freshly found shark tooth fossil from the Glen Dean Formation of Grayson County, Kentucky, USA. It appears to be a Petalodis (Owen, 1840) and dates to the Mississippian Period. This genus was named by the English paleontologist Richard Owen (1804-1892).

Thanks to Kenny for the pictures.

Zeacrinites wortheni Crinoid Calyx

This fossil was found in the Glen Dean Member of Grayson County, Kentucky USA. It is a crinoid calyx fossil that appears to be a Zeacrinites wortheni (Hall, 1858). The fossil dates to the Mississippian Period. The next three pictures show it from three more sides. Rule is in one centimeter blocks.

 

Phacelocrinus longidactylus Crinoid Fossil

 

Images are of a Phacelocrinus longidactylus (McChesney, 1860) crinoid calyx fossil the dark mass on the calyx is a Platyceras snail fossil. It was found in the Glen Dean Formation of Grayson County, Kentucky USA. The fossil dates to the Mississippian Period. Thanks to Kenny for the images.

 

Dasciocrinus Crinoid Calyx Fossil

 

Images are of a Dasciocrinus (Kirk, 1939) crinoid calyx fossil. It was found in the Glen Dean Formation of Grayson County, Kentucky USA. The fossil dates to the Mississippian Period. Thanks to Kenny for the images.

Tholocrinus spinosus Calyx Crinoid Fossil

These pictures are of a recent fossil find from the Glen Dean Member of Grayson County, Kentucky USA. It is a crinoid calyx fossil that appears to be a Tholocrinus spinosus (Wood, 1909). The fossil dates to the Mississippian Period.  Thanks to Kenny for the images.

 

In 1909, Elvira Wood (1865-1928) published A Critical Summary of Troost's Unpublished Manuscript on the Crinoids of Tennessee. On page 93, she names a new crinoid species Hydreionocrinus spinosus after the fossil by Wetherby who described it in 1881 as Hydreionocrinus depressus found by Troost. She writes that Wetherby had actually found a new species and thus she names it. It's genus was later changed to Tholocrinus (Kirk, 1939).

Pterotocrinus acutus Crinoid Calyx With Snail

 

This picture is a recent fossil find from the Glen Dean Member of Grayson County, Kentucky USA. It is a crinoid calyx fossil that appears to be a Pterotocrinus acutus (Wetherby, 1879). The fossil dates to the Mississippian Period. 

The most interesting part of the fossil is when it photographed from the top revealing a gastropod was attached to its anal tube when they both died. A somewhat common relationship found in the fossil record between these two creatures.

Thanks to Kenny for the image.

Platyceras Snail Fossil

 

Here is a recent find from Grayson County, Kentucky USA. It is a gastropod fossil that appears to be Platyceras sp. (Conrad, 1840), genus is also known as Orthonychia (Hall, 1843). Fossil dates to the Mississippian Period of the Glen Dean Member.

Thanks to Kenny for the image.

Bicidiocrinus Crinoid Fossil

This crinoid appears to be a Bicidiocrinus crinoid calyx fossil. It was found in the Glen Dean Member of Grayson County, Kentucky, USA. The fossilized animal dates to Chesterian, Upper Mississippian Period. Thanks to Kenny for the images.

Zeacrinites wortheni Crinoid Calyx Fossil with Stem

This crinoid appears to be a Zeacrinites wortheni (Hall, 1858) crinoid calyx fossil. As a bonus, this calyx has part of its stem. It was found in the Glen Dean Member of Grayson County, Kentucky, USA. The fossilized animal dates to Chesterian, Upper Mississippian Period. I believe this species was named for a paleontologist from Illinois named Amos Henry Worthen (1813-1888). Worthern was James Hall's assistant while he was State Geologists of Iowa 1855-1857.

Next to the calyx is some intricate Fenestella bryozoan fossils.

Thanks to Kenny for this remarkable fossil gift.

Arm Detail of an Onychocrinus Crinoid Fossil

These images are of the inside detail of an Onychocrinus crinoid arm fossil. Fossil found in the Glen Dean Member of Grayson County, Kentucky, USA. The fossil dates to the Mississippian Period.

Thanks to Kenny for the images.

Taxocrinus whitfieldi Crinoid Fossil

This posting shows a number of images of what appears to be a Taxocrinus whitfieldi crinoid fossil. It was found in Glen Dean Member of Grayson County, Kentucky, USA. The fossil dates to the Mississippian Period.

Thanks to Kenny for the images.

Onychocrinus pulaskiensis Crinoid Calyx Reconstructed

This fossil appears to be an Onychocrinus pulaskiensis crinoid calyx. It was meticulously reconstructed by my cousin Kenny. He found it in the Glen Dean Member of Grayson County, Kentucky, USA. The fossil dates to the Mississippian Period.

Cliothyridina sublamellosa Brachiopod with Hederella Bryozoan Fossil

This image shows what appears to be a Hederella bryozoan and spirobis (palaeoconchus?) that grew on a Cliothyridina sublamellosa brachiopod fossil. Fossils were found in the Glen Dean layer at Grayson County, Kentucky, USA. These creatures existed in the Mississippian Period.

Thanks to Kenny for image.

Corrections: Earlier post listed the brachiopod as a Reticularia setigera and the spelling for spirobis has been adjusted.

Onychocrinus Crinoid Calyx Fossils

This pictures show reconstructed Onychocrinus sp. crinoid calyx fossils. They were found in the Glen Dean Member of Grayson County Kentucky USA. The fossils date to the Mississippian Period. Thanks to Kenny for the images.

Reticulariina Brachiopod Fossil Spines

These images are of brachiopod fossils and close up images under the microscope of some of their spines. The brachiopod fossils are called Reticulariina spinosa and date to the Mississippian Period. They were found in the Glen Dean Member of Grayson County, Kentucky, USA.

Thanks to Kenny for images.

Platycerid Gastropod Fossil

Platycerid gastropod fossil found in Grayson County, Kentucky USA. It was in the Glen Dean Member. This snail roamed the ocean in the Mississippian Period. Thanks to Kenny for the images.

Pterocrinus acutus Crinoid with Snail Fossil

This crinoid calyx appears to be a Pterocrinus acutus (Wetherby, 1879). It has a snail fossil fossilized with it. The animals existed in the Mississippian Period and were found in the Glen Dean member of Grayson County Kentucky USA.

Thanks to Kenny for images.

See more images of crinoids like this at Don R. Chesnut's web page on fossils of the Sloans Valley Member (Paragon Formation).

http://www.uky.edu/OtherOrgs/KPS/stratigraphicfauna/sloansvalleymacrofauna/pages/sloansvalleyechinodermata.html

Pterocrinus Crinoid Calyx with Gastropod Fossil

This calyx was found while sifting through matrix while looking for dis-articulated crinoid arms for another fossil. It is quite a find measuring a little over 3 cm in width and it has part of gastropod fossil (see arrow) located near the top of its folded up arms.

This crinoid appears to be a Pterocrinus acutus (Wetherby, 1879). The creature existed in the Mississippian Period and was found in the Glen Dean member of Grayson County Kentucky USA. This next image has 3 arrows highlighting the spines on the arms.

Side view of spines below.

Thanks to Kenny for the images.

See more images of crinoids like this at Don R. Chesnut's web page on fossils of the Sloans Valley Member (Paragon Formation).

http://www.uky.edu/OtherOrgs/KPS/stratigraphicfauna/sloansvalleymacrofauna/pages/sloansvalleyechinodermata.html