Posts treating: "bryozoan"
Sunday, 11 December 2022
Saturday I gave a talk at the Falls of the Ohio Interpretative Center entitled "Fossils Around Us - You Don't Always Have to Go to the Wilds of Nature to Find Creatures of the Past". This presentation was about fossils one can find in buildings and other human constructed objects.
After finishing I checked out the Waldron Shale Fossil exhibit at the center. Lots of Silurian Period fossils to look at in the display case.
Highlighted in this post is a fossil called Fenestella acmea [...]
Bryozoan fossils found near Brookville Lake, Franklin County, Indiana USA and Waynesville Formation dates to the Ordovician Period. Images have a field of view is 2-3 cm. The one bryozoan shows evidence of snails boring into the colony.
Thanks to Kenny for the images.
This fossil was displayed on August 2022, at the Harvard Museum of Natural History in Cambridge, Massachusetts, USA. The bryozoa fossil called Archimedes reversus. This specimen was found in Illinois. It dates to the Mississippian/Carboniferous Period.
https://hmnh.harvard.edu/
My September 2021 trip to Alpena, Michigan USA with several amateur paleontologists from Louisville and Chicago, we visited a local paleontologist Paleo Joe (aka Joseph Kchodl).
This picture is of one of his bryozoan fossils from Middleport, New York USA. This fossil is known as Chilotrypa ostiolata (Hall, 1852). It was found in the Rochester Shale and existed in the Silurian Period.
Pictured above is a hash plate from the Calloway Creek Formation of Spencer County Kentucky USA. The main fossil is a mostly intact Caritodens demissa (Conrad, 1842) clam fossil with some interesting fossils on or around it. Below is unidentified 4mm diameter bryozoan fossil on the clam fossil.
Near the bryozoan on the shell is the 1.5 mm cephalon of unidentified trilobite fossil seen below.
Near by is the spine of an unidentified trilobite fossil measuring about 4 mm.
Off to the side [...]
These images show an interesting fossil combination. The fossil ensemble was found in the Kope Formation (Latonia (Eden) Shale) of Carroll County, Kentucky, USA. The main fossil appears to be a Prasapora simulatrix (Ulrich, 1886) bryozoan. The colony grew on top of the shell of a Hormotoma gracilis (Hall, 1847) gastropod. The imprint of the shell's spiral looks intact. These fossils existed in the Ordovician Period. I have found that when in an area with Kope Formation fossils that [...]
I have one example of Fenestellid type Bryozoans from the Jeffersonville formation. The specimen below has pieces of the fan like, lacy skeletons impressed on the chert. Unfortunately the preservation is not fine enough to preserve enough of the zooids to try and ID to the generic level.
I found this specimen near Lousiville, KY and believe it comes from the Jeffersonville Limestone, dated to the Devonian period (Eifelian stage).
I've found a few specimens of what appears to be a mounding Bryozoan that lived during the Devonian period during collecting trips to the Louisville, KY area. I've also received specimens from Mike P. via exchanges and he has them labelled as "Eridotrypa sp. from the Speed limestone". The Speed limestone is a member of the Silver Creek formation (or North Vernon/Sellersburg limestone depending on the resource you look at) and is above the Jeffersonville limestone.
I am unsure of the [...]
I've found a few small specimens of the delicate bryozoan Sulcoretipora incisurata at Deep Springs Rd. They are a flat genera of bryozoan that occasionally bifurcates. If these were present in the Windom shale then there was likely not very much turbulence in the water from waves or currents. This lends more evidence to the theory that sometimes the environment preserved in the Windom shale at this site was sometimes quiet enough for more delicate sessile animals thrive.
I've posted some [...]
This snail fossil is quite a find but so much more with encrusted worm tubes, bryozoans and pyrite cubic shapes. The snail appears to be a Platystoma niagarense with four visible Cornulites propius worm tubes and maybe a encrusting trepostome bryozoan. The end of the largest worm tube is a golden colored pyrite. The snail shell appears to be composed pyrite as well. It was found in the
This image is of a Spiropora elegans (LAMOUROUX 1821) bryzoan fossil. It was found in Ranville, Calvados, France. The fossil dates to the Jurassic Period (Bathonien). It was displayed at Muséum National D'Historie Naturelle Jardin Des Plantes Paléontologie et Anatomie Comparée, Paris, France. Image taken August
This image is of a Fenestella subantiqua (d'ORBIGNY 1850) fossil. It was found in Konieprus, Bohemia, Czechoslovakia. The fossil dates to the Devonian Period. It was displayed at Muséum National D'Historie Naturelle Jardin Des Plantes Paléontologie et Anatomie Comparée, Paris, France. Image taken August
This image is of a Constellaria constellata (VAN CLEVE 1846) fossil. It was found in Newport Kentucky. The fossil dates to the Ordovician Period. It was displayed at Muséum National D'Historie Naturelle Jardin Des Plantes Paléontologie et Anatomie Comparée, Paris, France. Image taken August
Here is a nice find showing 3 different fossils. What appears to be a Hederella and unknown bryozoan that grew on a Zaphrentoides coral 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
This fossil mold appears to be an Ambonychia clam with both valves and is big enough to almost cover the palm of a hand. The clam fossil may have several colonies of cyclostome bryozoan (though only their holdfasts remain). I don't see where the zooids would bud out of their protective structures.The branching pattern seen in the pictures can be found on quite a few clam molds at the
The Evactinopora grandis bryozoan fossil is quite unique in that its cross section looks more like starfish than a bryozoan. This one is part of a very unique fireplace in Louisville, Kentucky, USA. It is made up a lot of fossils from a variety of places. Unfortunately, the creators of the fireplace have passed away making it difficult with identifications and where the specimens are
This specimen is a mix between a fossil and mineral (calcite crystals). It appears to be Prasopora bryozoan fossil. The fossil dates to the Ordovician Period. It was found in Ripley County, Indiana, USA.
Thanks to Kenny for
These image appear to be the Lichenalia cocentrica bryozoan fossil. They existed in the Silurian Period. The fossils were found in the Waldron Shale of Clark County, Indiana USA. Thanks to Kenny for the
If you ever visit the Speed Art Museum in downtown Louisville next to the campus of the University of Louisville, check out the polished columns leading the Grand Staircase. The arrow in the image points to an area of the column with interesting fossils. It is next to the entrance to the Ancient art rooms.
The image above shows crinoid stem sections. The one shaped it a star pattern
Images of fenestrate bryozoan fossils found in Knobstone Formation of Clark County, Indiana USA. The fossil dates to the Mississippian Period. Thanks to Kenny for the
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