Cyclocrinitids

{{Short description|Informal group of green algae}}

{{Use dmy dates|date=September 2022}}

{{Automatic taxobox

| fossil_range = {{Fossil range| Middle Ordovician | Early Silurian}}

| taxon = Cyclocrinitids

}}

Cyclocrinitids are an early (mid-Ordovician–early-Silurian){{Cite book | doi = 10.1007/978-3-642-52335-9_6| chapter = Cyclocrinitids| title = Calcareous Algae and Stromatolites| year = 1991| last1 = Beadle| first1 = S. C.| pages = 114–124| isbn = 978-3-642-52337-3}} Dasycladalean algae, resembling but probably not closely related to the Receptaculitids.{{Cite journal | doi = 10.1111/j.1502-3931.1988.tb01745.x| title = Dasyclads, cyclocrinitids and receptaculitids: Comparative morphology and paleoecology| year = 1988| last1 = Beadle| first1 = Steven C.| journal = Lethaia| volume = 21| issue = 1| pages = 1–12| bibcode = 1988Letha..21....1B}}{{Cite book | doi=10.7312/webb12678-032 | chapter=31. Receptaculitids and Algae | title=The Great Ordovician Biodiversification Event | year=2004 | last1=Nitecki | first1=Matthew H. | last2=Webby | first2=Barry D. | last3=Spjeldnaes | first3=Nils | last4=Yong-Yi | first4=Zhen | pages=336–347 | isbn=9780231126786 }}