Bryozoan – Parvohallopora subnodosa – Ordovician Fossil – Cincinnati Ohio. 450 Million Years Old Fossils. 3.5 cms.or 1.5 inches long. SOLD
Individuals in bryozoan (ectoproct) colonies are called zooids, since they are not fully independent animals. All colonies contain autozooids, which are responsible for feeding and excretion. Don’t you love these names–Zooids!! Maybe AutoZone got their name from Autozooids!
Bryozoan fossils occur in many forms, including finger-shaped, fan-shaped, mats, spiralling fans, and massive irregular mounds. Many of the fossils, if examined closely with a magnifying glass, will show the individual pits where the individual bryozoans lived. Each animal was attached to the inside of its pit and could not leave the pit.