Cystoids
Photographed by Michael P. Klimetz


Holocystites scutellatus
[Complete in Shaly Limestone]

Silurian
Osgood Formation

Napoleon


INDIANA
Photographed by Michael P. Klimetz


Holocystites scutellatus
[Complete in Shaly Limestone]

Silurian
Osgood Formation

Napoleon


INDIANA
Photographed by Michael P. Klimetz


Tanaocystis watkinsi
[Complete in Limestone]

Ordovician - Blackriverian
Bromide Formation
Pooleville Member

Criner Hills

Carter County
OKLAHOMA
Photographed by Michael P. Klimetz


Tanaocystis watkinsi
[Complete in Limestone]

Ordovician - Blackriverian
Bromide Formation
Pooleville Member

Criner Hills

Carter County
OKLAHOMA
Photographed by Michael P. Klimetz


Tanaocystis watkinsi
[Complete in Limestone]

Ordovician - Blackriverian
Bromide Formation
Pooleville Member

Criner Hills

Carter County
OKLAHOMA
Photographed by Michael P. Klimetz


Holocystites scutellatus
[Partials in Shaly Limestone]

Silurian
Osgood Formation

Napoleon


INDIANA
Photographed by Michael P. Klimetz


Holocystites scutellatus
[Near Complete in Shaly Limestone]

Silurian
Osgood Formation

Napoleon


INDIANA
Photographed by Michael P. Klimetz


Holocystites scutellatus
[Partial in Shaly Limestone]

Silurian
Osgood Formation

Napoleon


INDIANA
Photographed by Michael P. Klimetz


Holocystites scutellatus
[Partial in Shaly Limestone]

Silurian
Osgood Formation

Napoleon


INDIANA
Photographed by Michael P. Klimetz


Holocystites parvulus

Silurian

Jefferson County
INDIANA
Photographed by Michael P. Klimetz


Holocystites parvulus

Silurian

Jefferson County
INDIANA
Photographed by Michael P. Klimetz


Holocystites parvulus

Silurian

Jefferson County
INDIANA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

[Calcite Filled]

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium


Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Echinosphaerites aurantium

[Calcite-Filled]

Ordovician

ESTONIA
Photographed by Michael P. Klimetz


Pleurocystites sp.
​[Near-Complete Calyx and Stalk in Marly Limestone]

Middle Ordovician
Prosser Formation

Goodhue County
MINNESOTA
Photographed by Michael P. Klimetz


Pleurocystites sp.
​[Near-Complete Calyx and Stalk in Marly Limestone]

Middle Ordovician
Prosser Formation

Goodhue County
MINNESOTA
Photographed by Michael P. Klimetz


Pleurocystites sp.
​[Near-Complete Calyx and Stalk in Marly Limestone]

Middle Ordovician
Prosser Formation

Goodhue County
MINNESOTA
Photographed by Michael P. Klimetz


Pleurocystites sp.
​[Near-Complete Calyx and Stalk in Marly Limestone]

Middle Ordovician
Prosser Formation

Goodhue County
MINNESOTA