Order Dasycladales (calcareous green algae) [dasyclads]
.......... Family Dasycladaceae (extinct and recent)
. Family Receptaculitaceae (extinct)
...........Tribe Receptaculiteae [receptaculitids]
...........Tribe Cyclocriniteae [cyclocrinitids]
.............. Genus Cyclocrinites
Silurian-Ordovician
Wayne County near Richmond, Indiana
"Fossils of this order [dasyclads] are only rarely recognized by collectors.". . .
"Fossil dasyclads are globose to c
© (image only) Harry Pristis 2012
