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 Add this item to the list   828866 Original description
   
Remarks (public):Notes: Arthrinium balearicum is phylogenetically close to A. phragmitis, a species with a similar ascospore size, (23–)26–30(–32) × (7–)9–10(–12) µm in A. balearicum, and (22–)23–28(–30) µm × (6–)7–9(–10) µm in A. phragmitis. Unfortunately, the asexual morph of A. balearicum could not be studied in order to compare it with that of A. phragmitis. 
Description type:Original description 
Description:Diagnosis: Sexual morph: Stromata forming black, linear, confluent raised areas on the host surface, with the longer axis broken at the apex, (500–)600–1500(–2000) µm × (200–)320–450(–500) µm (n=20). Ascomata globose to subglobose, with flattened base, blackish brown, (120–) 140–180 (–200) µm in diam. (n=30). Peridium 8-15 µm thick, consisting of 4–5 layers of cells arranged in textura angularis, externally dark brown, hyaline in the inner part. Ostiole single, central, 30–60 µm diam., with a periphysate channel 20–30 µm long. Peryphises broad, colorless. Hamathecium composed of dense hypha-like, broad septate paraphyses, deliquescing early, 4–6 µm thick. Asci 8-spored, unitunicate, clavate, broadly cylindrical, with an inconspicuous pedicel, rounded apex, thin-walled, without an apical apparatus, measuring (77–)80–98(–105) × (14–)15–19(–21) µm (n=22). Ascospores 1-3-seriate, hyaline, apiospore smooth-walled, fusiform, elliptical, reniform, straight or curved, bicellular, wider at the center of the longest cell, measuring (23–)26–30(–32) × (7–) 9–10(–12) µm (n=35), basal cell 3–6 µm long, sometimes containing a droplet. Asexual morph: not observed. Culture characteristics colonies flat spreading on MEA 2%, with moderate aerial mycelium, reverse withish. 
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