Aulopora
Encyclopedia
Aulopora is an extinct genus of tabulate coral
Tabulate coral
The tabulate corals, forming the order Tabulata, are an extinct form of coral. They are almost always colonial, forming colonies of individual hexagonal cells known as corallites defined by a skeleton of calcite, similar in appearance to a honeycomb. Adjacent cells are joined by small pores...

 characterized by a bifurcated budding pattern and conical corallites. Colonies commonly encrust hard substrates such as rocks, shells and carbonate hardgrounds
Carbonate hardgrounds
Carbonate hardgrounds are surfaces of synsedimentarily cemented carbonate layers that have been exposed on the seafloor . A hardground is essentially, then, a lithified seafloor. Ancient hardgrounds are found in limestone sequences and distinguished from later-lithified sediments by evidence of...

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