This Specimen has been sold.
2.2" Ordovician Bryozoan (Pseudohornera) Plate - Estonia
This is a plate of Upper Ordovician, Bryozoan fossils primary of the species Pseudohornera bifida and Pachydictya kuckersensis. They come from the Viivikonna Formation in Northeastern Estonia. The bryozoa have a white preservation that contrasts well against the lighter brown shale.
Bryozoans are microscopic aquatic invertebrates that live in colonies, forming skeletal structures. The form of these skeletal structures is unique to each particular species. The individual Byrozoans which form the colonies are called zooids and are filter feeders, straining nutrients from the surrounding water.