2015-08-10 Collemopsidium foveolatum (A.L. Sm.) F. Mohr 545932

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Description: Collemopsidium foveolatum (A.L. Sm.) F. Mohr Image location: Lourinhã, Portugal This observation refers to the lichen growing on barnacles that is noticed as black dots over the shell. Following the key in the reference one arrives to the pair of species C. foveolatum and C. sublitorale. They mainly differ by the size of perithecia, though overlaping (0.1-0.2 mm for the former and 0.15 – 0.5 mm for the latter). I estimate that the size of perithecia (involucrellum included) is consistently less than 0.2 mm, which makes C. foveolatum a good choice. I will try to make the microscopy, though the dimensions for the spores of the two species are also similar. Used references: British Flora : For more information about this, see the observation page at Mushroom Observer. English | español | français | italiano | македонски | മലയാളം | português | +/−. Date: 10 August 2015. Source: : This image is Image Number 545932 at Mushroom Observer, a source for mycological images. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. English | español | français | italiano | македонски | മലയാളം | português | +/−. Author: : This image was created by user zaca at Mushroom Observer, a source for mycological images.You can contact this user here. English | español | français | italiano | македонски | മലയാളം | português | +/−.