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 Add this item to the list   828869 Original description
Remarks (public):Notes: Arthrinium ibericum belongs in the large clade around A. sacchari, where it shows a significant relation with the subclade of A. phaeospermum, A. saccharicola, and the modern species A. serenense, A. camelliae-sinensis, A. jiangxiense, A. dichotomanthii, A. obovatum and A. pseudosinense. The size of conidia is more or less similar to that of A. camelliae-sinensis, where these measure about 9.0–13.5 μm in front view, but conidiogenous cells are a bit smaller in this species, measuring about 4.0–9.5 × 3.0–6.0 μm. Arthrinium pseudosinense has slightly smaller asci measuring 85–100 × 15–20 µm, and ellipsoid conidia covered with a mucilaginous sheath. Arthrinium saccharicola has hyphae slightly wider, about 3–5 µm. The genetic identity of A. phaeospermum is still dubious because of the lack of a proper type, but the lineages of this species in Crous & Groenewald (2013) have slightly smaller conidiogenous cells measuring 5–10 × 3–5 μm, and a different iron-grey color of colonies in MEA. 
Description type:Original description 
Description:Diagnosis: Sexual morph: Stromata solitary to gregarious, immersed or semi-immersed, fusiform to ellipsoid in shape, black, with the long axis broken at the top, 2–5 × 0.5–1 mm. Ascomata perithecial, subglobose with a flattened base, arranged in rows, brown to dark brown, exudating a white cirrhus of ascospores, 170–300 µm in diam. and 200–300 µm high. Peridium consisting in 3 or 4 layers of cells arranged in textura angularis. Ostiole single, central, 12–30 µm in diam., with a periphysate channel. Hamathecium composed of dense, septate, branched paraphyses. Asci 8-spored, clavate or cylindrical, lacking an apical apparatus, shortly pedicelate, measuring (82–)90–125(–128) × (14–)15–19(–21) μm (n=30). Ascospores uniseriate to biseriate, hyaline, smooth-walled, apiosporic, composed of a large curved upper cell and small lower cell, fusiform or slightly curved in shape with narrowly rounded ends, uniguttulated, lacking a gelatinose sheath, measuring (28–)29–34(–37) × (5–)6–8(–9) μm, and a basal cell 5–7 μm (n=45). Asexual morph: Mycelium hyaline, septate, branched, hyphae 2–4 μm in diam. Conidiophores reduced to the conidiogenous cells. Conidiogenous cells aggregated in clusters on hypha or solitary, ampuliform or cylindrical, 6–12 × 3 μm. Conidia brown, smooth, globose to ellipsoid (9–)10(–12) µm long (n=30) in face view, lenticular, with a paler equatorial slit, and (6–)7(–8) μm long (n=40) in side view. Sterile cells elongated, rolled up, sometimes mixed among conidia. Culture characteristics: ascospores germinating on MEA 2% within 24–48 h. Colonies flat, spreading, with sparse aerial mycelium, pale siena with white patches. 
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