| 词条 | Aspicilia phaea |
| 释义 |
| image = Aspicilia phaea 248999.jpg | width = | regnum = Fungi | divisio = Ascomycota | classis = Ascomycetes | ordo = Pertusariales | familia = Megasporaceae | genus = Aspicilia | species = A. phaea | binomial = Aspicilia phaea | binomial_authority = Owe-Larss. & A.Nordin (2007) }}Aspicilia phaea (dusky sunken disk lichen) is a grayish brown to tan areolate crustose lichen commonly found on rock in coastal to inland parts of central and southern California. Described as new to science in 2007,[1]{{rp|227}}[2] it is endemic to (only found in) California.[3] It grows on exposed or partially shaded siliceous rock, with a few known occurrences on serpentine rock.[2] In rare cases full areolas do not form, and it appears as being cracked (rimose).[1][2] There are often grayish or whitish spots on the areolas.[2] The thallus is 2–8 cm in diameter, and 0.1– 1.2 mm thick.[2] The areolas are irregularly sized and angular, giving the lichen body (thallus) the appearance of a mosaic of small polygons.[1][2] A rim of dark tissue (prothallus) may surround the edges of the lichen.[1][2] The fruiting body parts (apothecia) are flat to concave (especially in the thallus center), and slightly immersed in the thallus, appearing as sunken round to polygonal discs, often with a grey or white rim of thalline tissue.[1][2] Lichen spot tests are all negative (K-, C-, KC-, P-).[1][2] The photobiont is a chlorococcoid.[2] In Joshua Tree National Park, it is commonly found to be infected with Lichenostigma, a genus or lichenicolous fungi (fungi that are parasitic on lichens).[3] References1. ^1 2 3 4 5 Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, {{ISBN|978-0-300-19500-2}} 2. ^1 2 3 4 5 6 7 8 9 Lichen Flora of the Greater Sonoran Desert Region. Vol 3, Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001, 3. ^1 The Lichen Flora of Joshua Tree National Park An Annotated Checklist, Kerry Knudsen, Mitzi Harding, Josh Hoines, National Park Service, External links
3 : Fungi described in 2007|Fungi of North America|Pertusariales |
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