Titanoderma pustulatum (Lamouroux) Nägeli, 1858

Dey, Rikee, Basso, Daniela, Chakraborty, Arindam, Roy, Lopamudra, Bhaumik, Ajoy Kumar & Ghosh, Amit K., 2023, Rhodolith-forming coralline red algae in the CaCO biofactory - A case study from the Serravallian of tropical northeastern Indian Ocean, Comptes Rendus Palevol 22 (26), pp. 541-567 : 548-549

Titanoderma pustulatum (Lamouroux) Nägeli, 1858

( Fig. 4F)

Melobesia pustulata Lamouroux, 1816: 315 .

Titanoderma pustulatum (Lamouroux) Nägeli, 1858: 532 .

DESCRIPTION

Encrusting growth form, thallus dimerous, dorsiventral. Cells of VC 12 to 18 µm in length and 8 to 15 µm in diameter, palisade-like. Cells of PF are more or less squarish to rectangular, measuring 7 to 18 µm in length and 8 to 16 µm in diameter. Cell fusions occurring both in VC and PF.Epithallial cells are poorly preserved. Conceptacles uniporate, rose above the thallus surface, with chambers appearing hemispherical to elongated in section. Conceptacle chambers measure 110 to 140 µm in diameter and 72 to 94 µm in height ( Table 1).

REMARKS

This non-endophytic species of Titanoderma shows the growthform, size and shape of the conceptacle chamber and pore canal, conceptacle roof and thickness of the thallus that resemble Titanoderma pustulatum , as described by previous authors ( Chamberlain & Irvine 1994; Harvey et al. 2009; Van Der Merwe & Maneveldt 2015). The oldest record of T.pustulatum is from the early Oligocene of Iran ( Basso et al. 2019) ( Table 2).