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Diploschistes scruposus (Schreber) Norman
Family: Graphidaceae
[Lagerheimina scruposa (Schreb.) Kuntze,  more]
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Stephen Sharnoff  
Thallus: rimose-to verrucose-areolate; areoles: 0.4-1.5 mm in diam., plane to subconvex, thin or thick upper surface: greenish or brownish gray, smooth, shiny or dull, epruinose Ascomata: urceolate, sessile, slightly pruinose, up to 2.0 mm in diam.; disc: blackish, concave; proper exciple: up to 75 µm thick; hymenium: 100-140 µm high asci: subclavate to cylindrical, (4-) 8-spored ascospores: brown, muriform, ellipsoid, 25-40 x 10-20 µm; transverse septa 4-7, longitudinal septa 1-3 per transverse segment Pycnidia: immersed conidia: bacilliform, 4-6 x 1.0 µm Spot tests: K- or + yellow to red, C+ red, KC-, P-, UV- Secondary metabolites: diploschistesic acid (major or absent), lecanoric acid (major), and orsellinic acid (minor). Substrate and ecology: usually on siliceous rocks World distribution: cosmopolitan in relatively open habitats in Mediterranean, temperate and polar regions and extending to high altitudes in the tropics Sonoran distribution: common, at an elevation of c. 0-2700 m in Arizona, Baja California, California and Chihuahua. Notes: The saxicolous Diploschistes scruposus is characterized by an epruinose thallus and ureolate ascomata. A similar species is D. muscorum and the differences are discussed under that name.
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Lucy Taylor  
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Troy McMullin  
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Andrew Khitsun  
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Gary Perlmutter  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
Diploschistes scruposus image
Stephen Sharnoff  
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Andrew Khitsun  
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