Ancient Species -
Algae

The term "algae" refers to organisms which are aquatic and which manufacture their own food by "capturing" light energy to manufacture sugars. It includes photosynthetic bacteria (cyanobacteria), chromista ("coloured algae"), and rhodophyta ("red algae"), as well as "green algae" - none of which are closely related.

Some algae secrete silica or calcium carbonate and fossil records of such  algae date back to the Proterozoic Period about 1,250 years ago. Limestone deposits which originated as coral reefs usually contain large amounts of calcium carbonate from algae secretions. In some cases, algae contribute more to the building of coral reefs than coral do.

Green algae

 

Algae fossils now available (at eBay):

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Ordovician Solenoides iowensis algae fossil Ottosee Formation complete colony

AU $27.17
End Date: Friday Sep-13-2019 5:22:29 EST
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Fossil Margaretia Dorus Algae Trilobite Age Wheeler Fm MD61

AU $11.83
End Date: Sunday Sep-15-2019 21:31:08 EST
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Fossil Margaretia Dorus Algae Trilobite Age Wheeler Fm MD41

AU $22.18
End Date: Saturday Aug-31-2019 3:16:49 EST
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Fossil Margaretia Dorus Algae Trilobite Age Wheeler Fm MD46

AU $13.31
End Date: Saturday Sep-21-2019 7:12:06 EST
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Stromatolite fossil collection 18 species in display gem jars algae wide variety

AU $88.70
End Date: Sunday Aug-25-2019 18:53:08 EST
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Pennsylvanian Somphospongia fossil sponge algae fossil cut w/ great layers (sml)

AU $5.91
End Date: Friday Aug-30-2019 19:02:34 EST
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Pennsylvanian Somphospongia fossil sponge algae fossil cut polished half Medium

AU $13.59
End Date: Sunday Sep-22-2019 3:56:39 EST
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