Brief Summary

Read full entry


 Thallus: crustose, thick, consisting of dispersed or contiguous verrucae, up to 0.4-0.6 mm wide; surface: light to dark gray, dull; margin: determinate; prothallus: sometimes present, dark, fimbriate; vegetative propagules: absent; Apothecia: sessile, frequent, contiguous or not, up to 0.61 mm in diam.; disc: dark brown to black, concave at first, becoming plane; thalline margin: concolorous with thallus, prominent, 0.1-0.15 mm wide, entire and persistent; excipular ring: absent; thalline exciple: 60-110 µm wide laterally; cortex: 10-20 µm; cells: up to 4.5-5.5 µm wide, not pigmented; algal cells: up to 11.5-15.5 µm in diam.; thalline exciple: 90-140 µm below; cortex: 20-40 µm wide, cellular; proper exciple: hyaline, 10-15 µm wide laterally, expanded to (10-)20-30 µm at periphery; hymenium: 120140 µm tall; paraphyses: 2.5-3 µm wide, often conglutinate, sometimes with oil paraphyses, with apices lightly pigmented, up to 4-7 µm wide, immersed in dispersed pigment, forming orange-brown epihymenium; hypothecium: hyaline, 50-80 µm thick; asci: clavate, 70-80 x 22-25 µm, 8-spored; ascospores: brown, 1-septate, broadly ellipsoid, type A development, Pachysporaria-type, (18.9-)22.5-24(-28) x (10.5-) 13-14(-16.5) µm, lumina irregularly polygonal when immature, lumina often developing satellite apical lumina, more rarely additional lateral lumina, spores persistently thick walled, often slightly waisted at maturity; torus: narrow; walls: not ornamented; Pycnidia: prominent, dark brown to black, 0.05-0.1 mm in diam., on small verrucae; conidiophores: type I; conidia: bacilliform, 3.5-4.5 x c. 1 µm; Spot tests: K+ yellow, C-, KC-, P+ lemon yellow (rarely P+ red); Secondary metabolites: atranorin, zeorin and unknown substance 3-4/4-5/3 (or stictic acid replacing unknown).; Substrate and ecology: on siliceous rock and rhyolite; World distribution: endemic to southwestern North America; Sonoran distribution: southern Arizona and Chihuahua, at elevations of 1700-2560 m.; Notes: Rinodina verruciformis is characterized by its rock growing habit and large, Pachysporaria-type spores with small, apical, satellite lumina, and by its chemistry. The polygonal shape of the immature spore lumina indicate a relationship to R. algarvensis Giralt, Barbero & v.d. Boom (1996), another species on rock described from maritime southern Portugal. This latter species, however, lacks satellite apical spore lumina, and is sorediate, possessing discrete soralia. 


Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

Belongs to 0 communities

This taxon hasn't been featured in any communities yet.

Learn more about Communities


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!