Anisomeridium globosum

Anisomeridium globosum is a species of corticolous (bark-dwelling), crustose lichen in the family Monoblastiaceae. This species is characterised by its greyish-green thallus and its almost globose (spherical) ascomata (fruiting bodies). The ascospores are 1-septate, meaning they are divided into two sections, and measure 8–10.5 μm by 4.5–6 μm. The septum (dividing wall) is distinctly submedian, such that the lower cell is only about a quarter of the size of the upper cell. The type specimen of Anisomeridium globosum was collected from the Refúgio de Vida Silvestre Mata do Junco in Capela, Sergipe, Brazil, at an elevation of about 150 m (490 ft). The thallus is thin, shiny, and greyish-green, surrounded by an irregular white prothallus (a border around the thallus) about 1 mm wide. The ascomata are almost globose (more or less spherical), 0.3–0.45 mm in diameter, and superficial (situated on the surface) in the bark but completely covered by a thin layer of thallus. The walls of the asc......read more on Wikipedia.