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A B C
  1. secondary pit-connections (p2).
  1. epithallial cells with rounded or flattened but not flared cell walls.

tab. 37
  1. secondary pit-connections (p2) and cell fusions (cf);
  1. epithallial cells with flattened and flared cell walls.
    (reproductive structures: not tetrasporangial conceptacles but “sori” sunken in the thallus visible only as superficial pores NB: cruciate tetraspores).
Sporolithon ptychoides
  1. cell fusions (cf).
  1. epithallial cells with rounded or flattened but not flared cell walls.
Pneophyllum fragile
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