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 Add this item to the list   513417 Original description
Page number:250 
Remarks (public):Annulohypoxylon macrodiscum is close to A. truncatum but has larger ostiolar disks (0.5-0.8 mm diam) and larger perithecia (0.7-1 mm diam). Annulohypoxylon truncatum is usually associated with Quercus in North America. The host of A. macrodiscum is unknown. It differs from A. bovei (Speg.) Y.-M. Ju, J.D. Rogers & H.-M. Hsieh var. microsporum (J.H. Milll.) Y.-M. Ju, J.D. Rogers & H.-M. Hsieh in apparently having a truncatum-type disk. Unfortunately we were unable to culture it.  
Description type:Original description 
Description:Annulohypoxylon macrodiscum Jad. Pereira, J.D. Rogers & J.L. Bezerra, sp. nov. Figs. 11-14
MycoBank MB 513417
It differs from Annulohypoxylon truncatum (Schwein.: Fr.) Y.-M. Ju, J.D. Rogers & H.-M. Hsieh in the ostiolar disk 0.5-0.8mm diam and perithecia 0.7-1 mm diam.
Stromata effused-pulvinate, with conspicuous perithecial mounds, 2-5 x 2-3 mm broad and 0.8-1 mm thick; surface blackish with brownish tones, with KOH-extractable pigments green, black tissue below the perithecial layer, 0.3-0.5 mm thick. Perithecia black, spherical to obovoid, 0.7-1 mm diam x 0.5-1 mm high, with perithecial mounds one-quarter to one-half exposed. Ostioles papillate, with truncatum-type disk, 0.5-0.8 mm diam. Asci damaged, with apical ring bluing in Melzer's reagent, discoid. Ascospores brown to dark brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, 8-11 x 4-5 µm, with conspicuous straight germ slit spore length on convex side; perispore dehiscent in 10% KOH; epispore smooth.
Specimen examined. - Brazil. Bahia: Una, Una Ecopark, 15°09'50''W 39°03'14''S, 52 m. On indeterminate branch of dicotyledonous tree, 23-VIII-2007, Jad. Pereira (Holotype, WSP 71614).
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