Niebla isidiosa
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| Niebla isidiosa | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Lecanorales |
| Family: | Ramalinaceae |
| Genus: | Niebla |
| Species: | N. isidiosa |
| Binomial name | |
| Niebla isidiosa Spjut (1996) | |
Niebla isidiosa is a fruticose lichen known only from Guadalupe Island.[1] The epithet, isidiosa is in reference to isidia (isidium) on the thallus.
Niebla isidiosa is characterized by a rigid thallus divided into irregularly widened branches, to 5 cm long and 5 cm across, by its development of dense isidia along the reticulate ridges of the cortex, by containing divaricatic acid, and by the absence of pycnidia.[1] The irregular widened branches are similar to Niebla caespitosa, which not only lacks isidia, but also has a thinner cortex, 45–75 μm thick, in contrast to 100–150 μm thick in N. isidiosa. The thicker cortex of N. isidiosa—along with its reticulate ridging—is much like that of Niebla testudinaria, 100–150 μm thick; it also lacks isidia.[1] Another similar species, Niebla sorediata, which has a relatively thin cortex, 30–40 μm thick, differs by the granular appearance of the isidia that become sorediate (soredium).[1] Niebla isidiosa was probably derived from N. testudinaria, which also occurs on Guadalupe Island.[1]