Table 1 Floristic comparison between phototrophs encountered in the two sites of Catacombs of SS. Marcellino and Pietro and other previously studied Roman catacombs
Phototrophs | Other catacombs | SS. Marcellino and Pietro |
|---|---|---|
  Cyanobacteria | ||
    Scytonema julianum | ++ | ++ |
    Symphyonemopsis sp. | + | ++ |
    Leptolyngbya sp. | ++ | + |
    Oculatella subterranea | + | ++ |
    Loriella sp. | + | − |
    Gloeocapsopsis sp. | + | − |
    Gloeothece palea | + | − |
    Phormidium sp. | + | − |
  Green microalgae | ||
    Chlorella sp. | + | + |
  Diatoms | ||
    Diadesmis gallica | + | + |