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Species MB501005 Mycosphaerella alistairii Crous 2006   Bibliography: Crous, P.W.; Groeneveld, J.Z., 2006, Fungal Planet no. 4: (more info) Year of publication: 2006 Status of the name: basionym; legitimate MycoBank's opinion: this name is a synonym of Teratosphaeria alistairii (Crous) Crous & U. Braun 2007 (MB504468) Classification: Fungi, Ascomycota, Pezizomycotina, Dothideomycetes, Pleosporomycetidae, Pleosporales, Pleosporaceae, Teratosphaeria Obligate synonym(s): Teratosphaeria alistairii (Crous) Crous & U. Braun 2007 [LEG; MB504468] Morphic status: Teleomorph (anamorph connection(s) unknown or not recorded) Taxonomic synonym(s): Ordered by epithet name none Descriptions: Latin diagnosis (Crous, P.W.; Groeneveld, J.Z. 2006, Fungal Planet no. 4) Latin diagnosis: Mycosphaerellae bellulae similis, sed ascosporis majoribus, (9-)10-12(-13) x (2.5-)3-4 µm, differens. Typus: South Africa, Western Cape Province, Hermanus, Rotary Road, close to the Vodacom tower, on leaves of Protea repens, 31 Dec. 2005, collected by P.W. Crous & A. Smith, CBS-H 19765, holotypus; cultures ex-type CPC 12730 = CBS 120035, CPC 12731-12732. Original description (Crous, P.W.; Groeneveld, J.Z. 2006, Fungal Planet no. 4) Description: Leaf spots amphigenous, sub-circular to circular, 2-5 mm diam, pale to medium brown with a thin, raised, dark brown border. Ascomata pseudothecial, amphigenous, black, subepidermal, substomatal, erumpent to superficial, globose, up to 200 µm diam; apical ostiole 5 µm wide; wall consisting of 2-3 layers of medium brown textura angularis. Asci aparaphysate, fasciculate, bitunicate, subsessile, obovoid to broadly ellipsoid, straight to slightly curved, 8-spored, 35-50 x 6-8 µm. Ascospores bi- to tri-seriate, overlapping, hyaline, guttulate, thin-walled, straight, fusoid-ellipsoidal with obtuse ends, widest in middle of apical cell, medianly 1-septate, constricted at the septum, tapering towards both ends, but more prominently towards the lower end, (9-)10-12(-13) x (2.5-)3-4 µm in lactic acid; ascospores frequently becoming pale brown and slightly verruculose in older asci. Ascospores primarily geminating from polar ends with germ tubes parallel to the long axis of the spore; spores distorting, becoming brown and verruculose, up to 7 µm wide, with lateral branches growing out from the original ascospore. Conidiophores formed on brown, verruculose hyphae. Conidia brown, verruculose, subcylindrical to ellipsoid, with a marginal frill present at one or both ends; when aseptate, 7-10 x 4-6 µm; when 1-septate, 9-15 x 5-6 µm; when 2-3-septate, 15-25 x 5-7 µm. Cultural characteristics: Colonies on 2 % potato-dextrose agar (PDA; Difco) erumpent, spreading, reaching 40 mm diam after 5 weeks at 25 °C; surface olivaceous-black with moderate olivaceous-grey aerial mycelium; margins smooth, regular; reverse iron-grey; colonies fertile. Typus: South Africa, Western Cape Province, Hermanus, Rotary Road, close to the Vodacom tower, on leaves of Protea repens, 31 Dec. 2005, collected by P.W. Crous & A. Smith, CBS-H 19765, holotypus; cultures ex-type CPC 12730 = CBS 120035, CPC 12731-12732. Etymology Named after Alistair Smith of Kentucky Farms, Elgin, South Africa, who took me mountain-biking on his birthday, and patiently waited on top of the mountain while I collected this fungus. Date entered: 05/06/2006 01:53:48 Entered by: Mycobank administration Illustration #1: Description: Asci Author(s): P. Crous Illustration #2: Description: Asci Author(s): P. Crous Illustration #3: Description: Asci Author(s): P. Crous Illustration #4: Description: Asci Author(s): P. Crous Illustration #5: Description: Ascospore Author(s): P. Crous Illustration #6: Description: Ascospore Author(s): P. Crous Illustration #7: Description: Colony Author(s): P. Crous Illustration #8: Description: Colony Author(s): P. Crous Illustration #9: Description: Colony Author(s): P. Crous Illustration #10: Description: Conidia Author(s): P.Crous Illustration #11: Description: Conidia Author(s): P. Crous Illustration #12: Description: Conidia Author(s): P. Crous Illustration #13: Description: Conidia Author(s): P. Crous Illustration #14: Description: Conidia Author(s): P. Crous Illustration #15: Description: Conidia Author(s): P. Crous Illustration #16: Description: Germinating ascospore Author(s): P. Crous Illustration #17: Description: Germinating ascospore Author(s): P. Crous Illustration #18: Description: Germinating ascospore Author(s): P. Crous Illustration #19: Description: Germinating ascospores Author(s): P. Crous Illustration #20: Description: Germinating ascospore Author(s): P. Crous Illustration #21: Description: Substomatal ascoma Author(s): P. Crous Type specimen Herbarium number: CBS H-19765 Collected by: P.W. Crous & A. Smith, CPC 12730-12732, 2005 Substrate: Protea repens, leaves Location: South Africa, Western Cape Province, Hermanus, Rotary Road, close to the Vodacom tower