Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Eurotiales 
 BCRC Number 32118      
 Scientific Name: Eurotium rubrum

Eurotium rubrum Konig, Spieckermann & Bremer Z., Unters. Nahru. Genussm. 4: 726. 1901.

Anamorph: A. rubrobrunneus Samson & W. Gams apud Samson & Pitt, Adv. Penicillium Aspergillus System: 4. 1985.

 Description: Colony diameters on Czapek’s Agar 4.5-5.0 cm in 3 weeks at 25°C, plane; mycelium white, cream buff, mikado brown, mahogany red, or cinnamon-rufons, Hay’s russet. (R., Plate XXX, XXIX, II, XIV); conidial heads radiate to loosely columnar, deep greenish glaucous to deep grape green, or bice green to light hellebore green (R., Plate XLI, XVII); soluble pigment brown; reverse vinaceous-fawn to army brown (R., Plate XL); cleistothecia empire yellow to light orange-yellow (R., Plate IV, III), abundant in margin. Colony diameters on Malt Extract Agar 4.3-5.0 cm in 3 weeks at 25°C, plane to somewhat floccose; mycelium white, amber yellow, mustard yellow, clay color to mikado brown, or brick red (R., Plate XVI, XXIX, XIII); conidial heads often radiate rarely loosely columnar, deep greenish glaucous to pistachio green (R., Plate XLI); cleistothecia abundant, picric yellow to buff-yellow (R., Plate IV); soluble pigment vinaceous-fawn (R., Plate XL); reverse colorless to cinnamon-buff to mikado brown (R., Plate XXIX). Colony diameters on Czapek’s Agar with 20% added sucrose larger than 9 cm in 3 weeks, at 25°C, plane; mycelium warm buff, antimony yellow, zinc orange to salmon-orange, bit-tersweet orange, or apricot buff to vinaceous-rufous (R., Plate XV, II, XIV); reverse dark livid brown to warm blackish brown, or light seal brown (R., Plate XXXIX); conidial heads radiate to loosely columnar, celandine green to vetiver green (R., Plate XLVII); stipes smooth, 350-1095 × 8.0-25.0 μm; vesicles clavate, pyriform, or subglobose, 18-52 μm. Aspergilla uniseriate; phialides covering 1/2 to the whole surface of the vesicle, 5.8-13.3 × 4.6-8.0 μm; conidia subglobose, elongate, doliiform, globose, 4.6-8.0 × 5.0-7.5 μm, spinose to spinulose; cleistothecia globose to subglobose, 80.0-145.0 μm in diameter; asci globose to subglobose, 8-spored, 10.8-16.7 × 10.0-15.0 μm; ascospores lenticular, 5.0-7.1 × 4.0-5.8 μm, with a narrow to broad furrow, and two indistinct ridges, with smooth convex surfaces walls.

Taiwan, Changhwa Pref., from stored paddy rice, 1 Aug. 1987 (BCRC 32118); moldy leather, Taipei City, 6 Feb. 1988.

 Habitat: from stored paddy rice; moldy leather.

Taiwan, USA, Italy.


Tzean, SS et al., 1990.


S. S. Tzean and J. L. Chen

 Note: E. rubrum is closely related to E. repens, ascospores of both species are smooth, without crests. However, E. rubrum in having larger ascospores, with distinct furrow, whereas in E. repens, ascospores are smaller, also furrow is less distinct. In addition, in E. rubrum the conidial surface ornamentations are spinulose to spinose, but are somewhat thicker, more spaced, while in E. repens although are spinulose to spinose, but somewhat thinner and denser.