Slideshow image
Dermatocarpon luridum (With.) J. R. Laundon
Family: Verrucariaceae
[Biatora lurida (Dill. ex With.) Fr.,  more]
Dermatocarpon luridum image
Stephen Sharnoff  
Thallus: foliose, multi-lobed, consisting of many interconnected lobes with numerous holdfasts on the lower side with 4-25 mm wide lobes upper surface: light to dark brown with either type of epinecral layer, turns usually green when wet upper cortex: 60-130 µm thick with the outermost part, c. 10 µm, brownish algal layer: 40-160 µm thick, located in lower part of upper cortex or medulla medulla: 50-240 µm thick, turning red with Melzer's iodine lower cortex: 30-90 µm thick Perithecia: rather common, broadly obpyriform to globose, 210-490 µm high and 150-520 µm, primarily with a hyaline exciple that is light brown to brown in the uppermost part, rarely hyaline throughout asci: clavate or cylindrical, 8-spored ascospores: simple, hyaline, 10.5-20 x 5.5-8.5 µm Pycnidia: common, immersed, with ostiolum similar to that of the perithecium, or located in warts conidia: bacilliform, 4-5 x 1 µm. Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: rocks in seepages or by creeks and lakes World distribution: North America and Europe Sonoran distribution: throughout Arizona. Notes: Dermatocarpon luridum is a common species in seepages and brooks in the temperate zone of both Europe and North America. It is easily recognised by its Melzers reaction, multi-lobed habitus and that it usually turns green when wet.
Dermatocarpon luridum image
Troy McMullin  
Dermatocarpon luridum image
Troy McMullin  
Dermatocarpon luridum image
Stephen Sharnoff  
Dermatocarpon luridum image
Stephen Sharnoff  
Dermatocarpon luridum image
Stephen Sharnoff  
Dermatocarpon luridum image
Stephen Sharnoff  
Dermatocarpon luridum image
Stephen Sharnoff  
Dermatocarpon luridum image
Stephen Sharnoff  
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image
Dermatocarpon luridum image