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  1. conceptacles on the tips of sparse knobbly protuberances  (see tab. 14a).
  1. tetrasporangial conceptacles:
    •   800-1000µm in outer diameter.
  1. number of pores: 70.
  1. medullary cells:
    • 15 (20)µm (long);
    • (6) 9 µm (in diameter).
  1. cortical cells:
    • 15-24 (32)µm (long);
    • 8-12µm (in diameter).
Lithothamnion philippii
  1. conceptacles grouped on the tips of numerous excrescences (see tab. 14b).
  1. tetrasporangial conceptacles:
    •   300-600µm in diameter.
  1. number of pores: 20-30.
  1. medullary cells:
    • 10-15 (28)µm (long);
    • 3-7 µm (in diameter).
  1. cortical cells:
    • (6)7-8 (13)µm (long);
    • 6-9 µm (in diameter).
Lithothamnion valens
A
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