File:2012-03-26 Lichenostigma saxicola K. Knudsen & Kocourk 208669.jpg
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[edit]Description2012-03-26 Lichenostigma saxicola K. Knudsen & Kocourk 208669.jpg |
Lichenostigma saxicola K. Knudsen & Kocourk. Image location: Millard Canyon, Mount Wilson, San Gabriel Mountains, Los Angeles Co., California, USA Growing on bare granitic rock and neighboring thalli of Aspicilia confusa and Lecidea laboriosa. On well-sheltered north slope in open live oak forest, apparently long protected from fire, having escaped both of the major fires in the last 20 years even though areas were burned less than 100 yards away. This is apparently an extremely common nonlichenized rock-inhabiting fungus. It is often collected with saxicolous lichens. It is characterized by scattered minute black convex stroma, most of which are sterile. (Look for ones that have developed into tiny disks.) Unlike some other related species, it has few if any visible “stolons” connecting the stroma. I’ve been told that these fungi opportunistically parasitize free-living single-celled green algae growing on the surface and just within the substrate. K. Knudsen warns me that Lichenothelia convexa is another superficially very similar species. It has larger stroma, more conspicuous stolons connecting the stroma, the spores are 1-4-septate to sometimes even submuriform (but otherwise identical size, color and texture), and the asci have an amyloid centrum (stained with Lugol’s solution after a K wash). Used references: Knudsen, K. & J. Kocourková. 2010. A new Lichenostigma species (Genus incertae sedis) from southern California. The Bryologist 113(2): 229-234. Kocourková, J. & K. Knudsen. 2011. Lichenological notes2: Lichenothelia convexa, a poorly known rock-inhabiting and lichenicolous fungus. Mycotaxon 115: 345-351. Based on microscopic features: strictly 1-septate brown spores ~11×6µm
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:04, 8 June 2018 | 728 × 728 (152 KB) | Josef Papi (talk | contribs) | =={{int:filedesc}}== {{Information |Description='''''Lichenostigma saxicola''''' K. Knudsen & Kocourk. Image location: Millard Canyon, Mount Wilson, San Gabriel Mountains, Los Angeles Co., California, USA Growing on bare granitic rock and neighboring thalli of [http://mushroomobserver.org/observer/lookup_name/Aspicilia+confusa ''Aspicilia confusa''] and [http://mushroomobserver.org/observer/lookup_name/Lecidea+laboriosa ''Lecidea laboriosa'']. On well-sheltered north slope in open live oak... |
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Camera manufacturer | CASIO COMPUTER CO.,LTD. |
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Camera model | EX-Z1080 |
Exposure time | 1/4 sec (0.25) |
F-number | f/2.8 |
ISO speed rating | 200 |
Date and time of data generation | 12:51, 28 March 2012 |
Lens focal length | 7.9 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | GIMP 2.6.10 |
File change date and time | 12:21, 28 March 2012 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 12:51, 28 March 2012 |
Meaning of each component |
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Image compression mode | 2.7741869293116 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Spot |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Focal length in 35 mm film | 38 mm |
Scene capture type | Standard |
Scene control | High gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |