Name: Chasmatopora.
Meaning: Ravine or
gorge holes.
Grouping Bryozoan.
Fenestrid. Phylloporinin.
Informal ID: Sea fan. lacy
sea mat.
Fossil size: Colonies about
10cm/4in across.
Reconstructed size:
As aboye.
Habitat: Sea floor.
Time span: Ordovician to
Silurian, 480-420 million
years ago.
Main fossil sites: Europe,
Asia. North America.
Occurrence: ••