Colletotrichum indonesiense Damm, P.F. Cannon & Crous, sp. nov. MycoBank MB800502. Fig. 13.

Etymology. Named after the country of origin, Indonesia.

Sexual morph not observed. Asexual morph on SNA. Vegetative hyphae 1-7 [micro]m diam, hyaline, smooth-walled, septate, branched. Chlamydospores not observed. Conidiomata not developed, conidiophores formed directly on hyphae. Setae not observed. Conidiophores hyaline, smooth-walled, simple or septate and branched, to 40 [micro]m long. Conidiogenous cells hyaline, smooth-walled, cylindrical to [+ or -] inflated, 8-21 x 2-3.5 [micro]m, opening 1-1.5 [micro]m diam, collarette 1-1.5 [micro]m long, periclinal thickening distinct. Conidia hyaline, smooth-walled, aseptate, straight, cylindrical with one end round and one end acute, (8-)10-14.5(-18) x (2.5-)3.5-4(-4.5) [micro]m, mean [+ or -] SD = 12.3 [+ or -] 2.4 x 3.8 [+ or -] 0.3 [micro]m, L/W ratio = 3.2. Appressoria single, pale to medium brown, smooth-walled, elliptical, to subglobose in outline, the edge entire, sometimes undulate, 5.5-9(-14.5) x (5-)5.5-7.5(-9) [micro]m, mean [+ or -] SD = 7.5 [+ or -] 1.8 x 6.3 [+ or -] 1.0 [micro]m, L/W ratio = 1.2.

Asexual morph on Anthriscus stem. Conidiomata acervular, conidiophores formed on pale brown, angular, basal cells 2.5-6 [micro]m diam. Setae not observed. Conidiophores hyaline to pale brown, smooth-walled, septate, branched, to 60 [micro]m long. Conidiogenous cells hyaline to pale brown, smooth-walled, cylindrical, sometimes [+ or -] inflated, 9-25 x 2-4 [micro]m, opening 1-1.5 [micro]m diam, collarette 1-1.5 [micro]m long, periclinal thickening visible. Conidia hyaline, smooth-walled, aseptate, straight, cylindrical to fusiform with both ends acute, (10.5-)13-17.5(-19) x (3-)3.5-4 [micro]m, mean [+ or -] SD = 15.4 [+ or -] 2.2 x 3.7 [+ or -] 0.2 [micro]m, L/W ratio = 4.1.

Culture characteristics: Colonies on SNA flat, partly raised with entire margin, hyaline, buff to pale honey, on medium, filter paper and Anthriscus stem partly covered with irregular white aerial mycelium, Anthriscus stem partly covered with orange acervuli, reverse hyaline, white, buff to cinnamon, filter paper partly olivaceous grey; growth rate 18.5-20 mm in 7 d (30-31 mm in 10 d). Colonies on OA flat, partly raised with entire margin; surface covered with irregular floccose to woolly white to olivaceous grey aerial mycelium and few orange acervuli, reverse buff, cinnamon to dark purplish grey; growth rate 22.5-24 mm in 7 d (32.5-34 mm in 10 d). Conidia in mass orange.

Material examined: Indonesia: Sumatra, Tele, from leaf spots developing after herbicide treatment of Eucalyptus sp., 1 Jan. 2008, M.J. Wingfield, (CBS H-20798 holotype, culture ex-type CBS 127551 = CPC 14986).

Notes: Eucalyptus is not a well-known disease reservoir for Colletotrichum species. Colletotrichum eucalypti was described from Brazil by Bitancourt (1927) and noted again by Viegas (1946) from the Campinas region, causing anthracnose of Eucalyptus leaves. Viegas described the species as having conidia that are elongate-fusiform to oblong and 10-20 x 3-5 [micro]m in size; the description is reminiscent of the C. acutatum species complex, but cultures are not available, we have not seen type material, and the species was described from a different continent.

There is a number of Gloeosporium...