Stromatocerium huronense (Billings, 1865)
Late Ordovician stromatoporoid sponge. Found along the Credit River at Streetsville, Mississauga, Ontario. Collected as a loose specimen, most likely coming from the Stromatocerium reef of the exposure this came from. Georgian Bay formation, late Ordovician. There is a tiny Favistella alveolata coral colony growing on the edge of the specimen, perhaps this was a commensalistic relationship?
Specimen is 12 cm long. However this species in the exposure where it came from can grow beyond a foot in diameter as mounds.
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Photo Information for Stromatocerium huronense
Taken with Apple iPhone 6
- 4.2 mm
- f f/2.2
- ISO 50