|
Placopyrenium
''Placopyrenium'' is a genus of saxicolous lichen, saxicolous (rock-dwelling), crustose lichens in the family Verrucariaceae. Taxonomy The genus was circumscription (taxonomy), circumscribed in 1987 by the Austrian lichenologist Othmar Breuss. He assigned ''Placopyrenium bucekii'' as the type species. Description The genus ''Placopyrenium'' is characterised by its (growing on rocks) thallus, which is thick and distinctly patterned, breaking into (small, island-like sections) or squarrose-areolate (with scale-like, spreading areoles). These areoles have a unique shape, being noticeably narrowed at their base and extending into elongated stipes (stalks), which are ashen in colour on the upper surface due to a protective , while the underside is black. The thallus lacks (root-like hyphae) and the stipes are directly attached to the . The entire thallus is composed of cells that are either angular or rounded, measuring 5–10 micrometre, μm in diameter, forming a structur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placopyrenium Bucekii
''Placopyrenium'' is a genus of saxicolous lichen, saxicolous (rock-dwelling), crustose lichens in the family Verrucariaceae. Taxonomy The genus was circumscription (taxonomy), circumscribed in 1987 by the Austrian lichenologist Othmar Breuss. He assigned ''Placopyrenium bucekii'' as the type species. Description The genus ''Placopyrenium'' is characterised by its (growing on rocks) thallus, which is thick and distinctly patterned, breaking into (small, island-like sections) or squarrose-areolate (with scale-like, spreading areoles). These areoles have a unique shape, being noticeably narrowed at their base and extending into elongated stipes (stalks), which are ashen in colour on the upper surface due to a protective , while the underside is black. The thallus lacks (root-like hyphae) and the stipes are directly attached to the . The entire thallus is composed of cells that are either angular or rounded, measuring 5–10 micrometre, μm in diameter, forming a structur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |