australiensis

Marine species:
Annabella australiensis Fryar, Haelew. & D.E.A. Catches., Mycological Progress 18: 973-981

MycoBank: MB 829170

Saprobic on attached, decorticated, dead branch of Avicennia marina (Forssk.) Vierh. (Lamiales, Acanthaceae) in the upper intertidal region. Sexual morph: Ascomata minute, apothecial, hyaline to pale yellowish, superficial, perithecioid, with a broad ostiolar opening when mature, solitary or gregarious, (175)188-225(250) µm high, (88)100-123(188) µm diam. ( =210 x 123 µm, n=8), initially closed, then opening to a maximum of 100 µm wide, tissues not ionomidotic. Ectal excipulum thin, composed of cells of textura angularis-epidermoidea ((6)9-20(30) x 4-13 µm,  = 15 x 7 µm, n= 20). Paraphyses septate, hyaline, 1.5-2.5 µm wide ( = 2 µm, n = 9), sparsely branched (mostly unbranched, occasionally forked towards the tip), protruding beyond the asci, growing from subhymenium, upper ends free. Asci 8-spored, cylindrical, unitunicate, arising from croziers , ascospores uniseriate, no apical wall thickening or ring structure, rounded apices, inamlyoid, ascospores expelled through a split at or near the apex, (72.5)80-130(150) x (5)6-7.5(9) µm ( = 99 x 7.5 µm, n=22), contents turning rusty-red in Melzers and faintly yellow/brown in Melzers when pretreated with 2-5% KOH, ascus wall inamyloid . Ascospores not overlapping in the asci and straight, highly variable in shape, ellipsoid to fusoid to oblong, hyaline, two, occasionally one large oil drop per ascospore, aseptate, (7.5)9-14(17.5) x (4)5-6(7.5) µm ( = 11 x 5.5 µm, n = 30), no appendages or sheath, sometimes budding outside the asci. Asexual morph: undetermined.