Search on : Taxa descriptions

 


 
 Add this item to the list   831825 Original description
   
Remarks (public):known from the type locality in Portugal (Sintra) 
Description type:Original description 
Description:Diagnosis. Species characterized by the production of branched isidia, dark greyish to almost black apothecia containing Cinereorufa-green pigment and measuring 0.15–0.5 mm in diam., (0-)1-septate, narrowly ellipsoidal to clavate ascospores measuring 7.5–12 × (2.5–)3–4.5 µm and the production of methoxymicareic acid. Description. Thallus inconspicuous, thin, consisting of often branched and vertically proliferating fine isidia; prothallus not seen; areoles up to 0.1 mm in diam.; isidia developing from small areoles, vertically branched and coralloid, in some parts crowded and forming almost a continuous layer, but separated in younger parts of thalli, brownish green, up to 500 μm tall and 30 μm wide, with a distinct and complete hyphal layer; apothecia abundant, adnate, flat to moderately convex, emarginate, 0.15–0.5 mm in diam., dark greyish to almost black, sometimes with a pale greyish rim; hymenium greenish, with pale brownish streaks, K–, C‒, 30–40 µm high; epihymenium aeruginose greenish, with Cinereorufa-green pigment, K+ green intensifying; hypothecium hyaline; paraphyses sparse, branched, tips not widened and not pigmented, c. 1.0‒1.5 µm wide; asci cylindrical to clavate, 24–28 × 9–12 µm, 8-spored; ascospores narrowly ellipsoid to clavate, 7.5–12 × (2.5–)3–4.5 µm, (0–)1-septate; micropycnidia inconspicuous, rare, 30–60 µm in diam., with dark brown top (K–, C‒); microconidia bacilliform, sometimes slightly curved, aseptate, 7–10 × 0.5–0.9 µm; crystalline granules (studied in polarized light) not visible in apothecium, but detected in isidia (sometimes isidia very abundant, and sometimes very few), insoluble in K. Photobiont micareoid, cells thin walled, 4–8 µm diam., clustered in compact masses. Chemistry. Methoxymicareic acid detected by TLC. Cinereorufa-green in apothecia (epihymenium). 
Taxon name: